Select the transport configuration

Abstract

Methods, systems, and apparatus for wireless communications are described. A non-coherent modulation configuration may be selected for transmission of a data set based on a radio frequency spectrum band used for the transmission. After selecting the non-coherent modulation configuration, a differential phase shift keying modulation technique may be used to modulate the data set. After selecting the non-coherent modulation configuration, a frequency domain symbol set may be generated from a modulated symbol set using a discrete Fourier transform. The frequency domain symbol set may be mapped to a set of subcarriers, and a time domain waveform may be generated from the mapped frequency domain symbol set, thereby producing a time domain waveform. The time domain waveform may be transmitted over a radio frequency spectrum band.

Description

[0001] Cross-references

[0002] This patent application claims priority to U.S. Patent Application No. 17 / 332,052, entitled “SELECTING ATRANSMISSION CONFIGURATION,” filed by HORN et al. on May 27, 2021, and U.S. Provisional Patent Application No. 63 / 037,530, entitled “SELECTING A TRANSMISSION CONFIGURATION,” filed by HORN et al. on June 10, 2020, each of which is assigned to the assignee of this application and is expressly incorporated herein by reference. Technical Field

[0003] The present disclosure relates to wireless communications and, more particularly, to selecting a transmission configuration.

[0004] background

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcasting, etc. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth generation (4G) systems (such as long term evolution (LTE) systems, advanced LTE (LTE-A) systems, or LTE-A Pro systems), and fifth generation (5G) systems, which may be referred to as new radio (NR) systems. These systems may use various technologies, such as code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), or discrete Fourier transform extended orthogonal frequency division multiplexing (DFT-S-OFDM) (which may also be referred to as single carrier frequency domain multiple access (SC-FDMA)). A wireless multiple access communication system may include one or more base stations or one or more network access nodes, each base station or network access node simultaneously supporting the communication of multiple communication devices, which may be referred to as user equipment (UE) in addition.

[0006] Different technologies (e.g., OFDMA and SC-FDMA) may be associated with different levels of peak-to-average power ratio (PAPR). In some examples, OFDMA technology is used to transmit downlink information, and SC-FDMA technology is used to transmit uplink information (e.g., due to lower PAPR characteristics associated with SC-FDMA technology).

[0007] Overview

[0008] The described technology relates to improved methods, systems, devices, and apparatuses that support selecting a transmission configuration. As disclosed herein, when communications are performed on a high spectrum band, a non-coherent modulation technique may be used. In some examples, a differential phase shift keying (DPSK) modulation technique may be used for communications performed on a high spectrum band. In some examples, when the phase noise associated with communicating in a high spectrum band exceeds a threshold (e.g., a predetermined threshold) and / or when the modulation and coding scheme (MCS) selected for communicating in a high spectrum band exceeds another threshold (e.g., another predetermined threshold), the DPSK modulation technique may be used for communications. By using the DPSK modulation technique for communications on a high spectrum band, the effects of phase noise may be ignored, thereby increasing the reliability of communications performed on the high spectrum band.

[0009] Additionally or alternatively, a single carrier frequency domain multiplexing (SC-FDM) transmission mode may be used in conjunction with a higher order phase shift keying (PSK) modulation technique. Unlike using a higher order quadrature amplitude modulation (QAM) with SC-FDM transmission, the peak-to-average power ratio (PAPR) of the SC-FDM transmission may be improved (or at least not increased) when a higher order PSK modulation technique is used - for example, due to smoother upsampling of the higher order PSK modulation relative to a lower order PSK modulation (such as QPSK). In some examples, a higher order PSK modulation technique is used in conjunction with the SC-FDM transmission based on the amount of upsampling performed during the generation of the SC-FDM transmission - for example, the PSK modulation order may increase as the amount of upsampling increases. Thus, by using a higher order PSK modulation with the SC-FDM transmission mode, the throughput of the SC-FDM communication may be increased while improving the PAPR. In some examples, the SC-FDM transmission mode may be used in conjunction with a higher order DPSK modulation technique. By using higher order DPSK modulation in conjunction with the SC-FDM transmission mode, the impact of phase noise at higher frequencies can be mitigated and the throughput of SC-FDM communications can be increased while improving the PAPR.

[0010] A method for wireless communication at a transmitting device is described. The method may include: selecting a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by the transmitting device to communicate with a receiving device; modulating a data set using DPSK modulation based on the non-coherent modulation configuration to obtain a modulated codeword set; generating a frequency domain codeword set from the modulated codeword set using a discrete Fourier transform; and transmitting a time domain waveform obtained from the frequency domain codeword set in a codeword period of the radio frequency spectrum band.

[0011] An apparatus for wireless communication at a transmitting device is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: select a non-coherent modulation configuration from a modulation configuration group based on a radio frequency spectrum band used by the transmitting device to communicate with a receiving device; modulate a data set using DPSK modulation based on the non-coherent modulation configuration to obtain a modulated codeword set; generate a frequency domain codeword set from the modulated codeword set using a discrete Fourier transform; and transmit a time domain waveform obtained from the frequency domain codeword set in a codeword period of the radio frequency spectrum band.

[0012] Another apparatus for wireless communication at a transmitting device is described. The apparatus may include means for: selecting a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by the transmitting device to communicate with a receiving device; modulating a data set using DPSK modulation based on the non-coherent modulation configuration to obtain a modulated codeword set; generating a frequency domain codeword set from the modulated codeword set using a discrete Fourier transform; and transmitting a time domain waveform obtained from the frequency domain codeword set in a codeword period of the radio frequency spectrum band.

[0013] A non-transitory computer-readable medium storing code for wireless communication at a transmitting device is described. The code may include instructions executable by a processor to perform the following operations: select a non-coherent modulation configuration from a modulation configuration group based on a radio frequency spectrum band used by the transmitting device to communicate with a receiving device; modulate a data set using DPSK modulation based on the non-coherent modulation configuration to obtain a modulated codeword set; generate a frequency domain codeword set from the modulated codeword set using a discrete Fourier transform; and transmit a time domain waveform obtained from the frequency domain codeword set in a codeword period of the radio frequency spectrum band.

[0014] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for transmitting to the receiving device an indication that a noncoherent single carrier frequency domain multiple access (SC-FDMA) mode may have been selected based on the noncoherent modulation configuration being selected.

[0015] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the indication may be transmitted in a control channel using a coherent multi-carrier orthogonal frequency domain multiple access (OFDMA) mode.

[0016] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: receiving a request from the receiving device to configure the non-coherent modulation configuration, wherein the non-coherent modulation configuration may be selected based on the request.

[0017] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: identifying phase noise associated with transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration may be selected based on the phase noise exceeding a threshold.

[0018] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: identifying that the radio frequency spectrum band includes a millimeter wave spectrum band, a sub-terahertz spectrum band, or both, wherein the non-coherent modulation configuration may be selected based on the data set being scheduled for transmission on the millimeter wave spectrum band or the sub-terahertz spectrum band.

[0019] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: identifying a modulation and coding scheme for transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration may be further selected based on the modulation and coding scheme exceeding a threshold.

[0020] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: identifying a spectral efficiency associated with a communication link between the transmitting device and the receiving device for a DPSK constellation set based on the non-coherent modulation configuration being selected; and selecting a differential amplitude phase shift keying (DAPSK) constellation based on the spectral efficiency associated with the DPSK constellation set being below a threshold, wherein the data set may be modulated according to the DAPSK constellation.

[0021] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for: disabling transmission of a phase tracking reference signal based on the non-coherent modulation configuration being selected; and mapping a portion of the data set to resources allocated for the phase tracking reference signal.

[0022] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, a code rate of the time-domain waveform may be reduced based on the mapping.

[0023] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: selecting a single carrier frequency domain multiple access (SC-FDMA) mode from a group of channel access modes based on the radio frequency spectrum band, wherein the set of frequency domain codewords may be generated using a discrete Fourier transform based on the SC-FDMA mode being selected.

[0024] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: identifying a spectral efficiency associated with the communication link between the transmitting device and the receiving device for the SC-FDMA mode; and selecting a multiple-input multiple-output (MIMO) SC-FDMA mode based on the spectral efficiency associated with the SC-FDMA mode being lower than a threshold, wherein the set of frequency-domain codewords may be generated using a discrete Fourier transform based on the MIMO SC-FDMA mode.

[0025] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: identifying the amount of resources allocated to the transmitting device and the carrier bandwidth configured for the transmitting device; and selecting the DPSK constellation based on the PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and the DPSK constellation, wherein the PAPR associated with the DPSK constellation may be based on a relationship between the amount of resources allocated to the transmitting device and the carrier bandwidth, and wherein the data set may be modulated according to the DPSK constellation.

[0026] In some examples of the methods, devices, and non-transitory computer-readable media described herein, selecting the DPSK constellation may include operations, features, devices, or instructions for the following actions: determining that an entry in a table corresponding to the amount of resources and the carrier bandwidth includes an indication of the DPSK constellation.

[0027] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: identifying a peak-to-average power (PAPR) threshold for communicating on the radio frequency spectrum band; identifying a first PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and a first DPSK constellation having a first order; and identifying a second PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and a second DPSK constellation having a second order, the second order may be greater than the first order, wherein the data set may be modulated according to the second DPSK constellation based on the second PAPR being lower than the PAPR threshold.

[0028] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the channel access mode group includes a single-carrier channel access mode and a multi-carrier channel access mode.

[0029] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: disabling transmission of a demodulation reference signal based on a delay profile associated with communicating on the radio frequency spectrum band using a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode; and mapping a portion of the data set to resources allocated for the demodulation reference signal, wherein the code rate of the time domain waveform may be reduced based on the mapping.

[0030] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: selecting a coherent modulation configuration from the modulation configuration group based on the radio frequency spectrum band, modulation and coding scheme, phase noise, or a combination thereof; modulating a second data set using a phase shift keying (PSK) modulation configuration to obtain a second modulated codeword set based on the coherent modulation configuration being selected; and transmitting a second time domain waveform in a second codeword period of the radio frequency spectrum band based on the second modulated codeword set.

[0031] In some examples of the methods, devices, and non-transitory computer-readable media described herein, the second data set is scheduled for transmission on a submillimeter wave spectrum band, the modulation and coding scheme used to transmit the second data set on the radio frequency spectrum band is lower than a first threshold, the phase noise associated with transmitting the second data set on the radio frequency spectrum band is lower than a second threshold, or a combination thereof.

[0032] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: selecting a single carrier frequency domain multiple access (SC-FDMA) mode from a group of channel access modes for communicating on the radio frequency spectrum band based on the radio frequency spectrum band, the modulation and coding scheme, the phase noise, or a combination thereof; and generating a second frequency domain codeword set from a second modulated codeword set using a discrete Fourier transform based on the SC-FDMA mode, wherein a second time domain waveform can be obtained from the second frequency domain codeword set.

[0033] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: identifying a peak-to-average power (PAPR) threshold for communicating on the radio frequency spectrum band using the SC-FDMA mode; and increasing the order of the PSK modulation based on the PAPR threshold, wherein the PAPR of the second time domain waveform may be increased based on the order of the PSK modulation to meet the PAPR threshold.

[0034] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: mapping a second set of frequency domain symbols to a set of subcarriers in the radio frequency spectrum band; generating a third time domain waveform from the mapped second set of frequency domain symbols using an inverse discrete Fourier transform; and upsampling the third time domain waveform to obtain a second time domain waveform.

[0035] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: mapping a second set of modulated codewords to a set of subcarriers in the radio frequency spectrum band; generating a third time domain waveform from the mapped second set of modulated codewords using an inverse discrete Fourier transform; and upsampling the third time domain waveform to obtain a second time domain waveform.

[0036] In some examples of the methods, devices, and non-transitory computer-readable media described herein, the modulation configuration group includes one or more coherent modulation configurations and one or more non-coherent modulation configurations.

[0037] In some examples of the methods, devices (apparatuses), and non-transitory computer-readable media described herein, the DPSK modulation includes differential M-ary phase shift keying modulation or differential amplitude M-ary phase shift keying modulation.

[0038] A method for wireless communication at a receiving device is described. The method may include: selecting a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by the receiving device to communicate with a transmitting device; receiving a time domain waveform in a symbol period of the radio frequency spectrum band; generating a frequency domain symbol set from the time domain waveform using a discrete Fourier transform; demapping the frequency domain symbol set from a set of subcarriers in the radio frequency spectrum band; generating a modulated symbol set from the demapped frequency domain symbol set using an inverse discrete Fourier transform; and demodulating the modulated symbol set using DPSK demodulation based on the non-coherent modulation configuration to obtain a data set.

[0039] An apparatus for wireless communication at a receiving device is described. The apparatus may include a processor, a memory coupled to the processor, and instructions stored in the memory. The instructions may be executable by the processor to cause the apparatus to: select a non-coherent modulation configuration from a modulation configuration group based on a radio frequency spectrum band used by the receiving device to communicate with a transmitting device; receive a time domain waveform in a symbol period of the radio frequency spectrum band; generate a frequency domain symbol set from the time domain waveform using a discrete Fourier transform; demap the frequency domain symbol set from a set of subcarriers in the radio frequency spectrum band; generate a modulated symbol set from the demapped frequency domain symbol set using an inverse discrete Fourier transform; and demodulate the modulated symbol set using DPSK demodulation based on the non-coherent modulation configuration to obtain a data set.

[0040] Another apparatus for wireless communication at a receiving device is described. The apparatus may include means for: selecting a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by the receiving device to communicate with a transmitting device; receiving a time domain waveform in a symbol period of the radio frequency spectrum band; generating a frequency domain symbol set from the time domain waveform using a discrete Fourier transform; demapping the frequency domain symbol set from a set of subcarriers in the radio frequency spectrum band; generating a modulated symbol set from the demapped frequency domain symbol set using an inverse discrete Fourier transform; and demodulating the modulated symbol set using DPSK demodulation based on the non-coherent modulation configuration to obtain a data set.

[0041] A non-transitory computer-readable medium storing code for wireless communication at a receiving device is described. The code may include instructions executable by a processor to perform the following operations: select a non-coherent modulation configuration from a modulation configuration group based on a radio frequency spectrum band used by the receiving device to communicate with a transmitting device; receive a time domain waveform in a symbol period of the radio frequency spectrum band; generate a frequency domain symbol set from the time domain waveform using a discrete Fourier transform; demap the frequency domain symbol set from a set of subcarriers in the radio frequency spectrum band; generate a modulated symbol set from the demapped frequency domain symbol set using an inverse discrete Fourier transform; and demodulate the modulated symbol set using DPSK demodulation based on the non-coherent modulation configuration to obtain a data set.

[0042] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: receiving an indication from the receiving device that a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode may have been selected to transmit the data set.

[0043] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the indication may be received in a control channel using a coherent multi-carrier OFDMA mode.

[0044] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: transmitting a request to the transmitting device to configure the non-coherent modulation configuration based on selecting the non-coherent modulation configuration.

[0045] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: identifying phase noise associated with transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration may be selected based on the phase noise exceeding a threshold.

[0046] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: identifying that the radio frequency spectrum band includes a millimeter wave spectrum band, a sub-terahertz spectrum band, or both, wherein the non-coherent modulation configuration may be selected based on the data set being scheduled for transmission on the millimeter wave spectrum band or the sub-terahertz spectrum band.

[0047] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: identifying a modulation and coding scheme for transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration may be further selected based on the modulation and coding scheme exceeding a threshold.

[0048] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: identifying a spectral efficiency associated with a communication link between the receiving device and the transmitting device for a DPSK constellation set based on the non-coherent modulation configuration being selected; and selecting a DAPSK constellation based on the spectral efficiency associated with the DPSK constellation set being below a threshold, wherein the data set can be demodulated according to the DAPSK constellation.

[0049] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: determining that transmission of a phase tracking reference signal can be disabled based on the non-coherent modulation configuration being selected; and receiving a portion of the data set on resources allocated for the phase tracking reference signal.

[0050] Some examples of the methods, devices, and non-transitory computer-readable media described herein may further include operations, features, devices, or instructions for the following actions: selecting a single carrier frequency domain multiple access (SC-FDMA) mode from a group of channel access modes based on the radio frequency spectrum band, wherein the set of frequency domain codewords may be generated using a discrete Fourier transform based on the SC-FDMA mode being selected.

[0051] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: identifying a spectral efficiency associated with the communication link between the transmitting device and the receiving device for the SC-FDMA mode; and selecting a MIMO SC-FDMA mode based on the spectral efficiency associated with the SC-FDMA mode being lower than a threshold, wherein the set of frequency-domain codewords may be generated using a discrete Fourier transform based on the MIMO SC-FDMA mode.

[0052] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: identifying the amount of resources allocated to the receiving device and the carrier bandwidth configured for the receiving device; and selecting the DPSK constellation based on the PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and the DPSK constellation, wherein the PAPR associated with the DPSK constellation may be based on a relationship between the amount of resources allocated to the transmitting device and the carrier bandwidth, and wherein the data set may be demodulated according to the DPSK constellation.

[0053] In some examples of the methods, devices, and non-transitory computer-readable media described herein, selecting the DPSK constellation may include operations, features, devices, or instructions for the following actions: determining that an entry in a table corresponding to the amount of resources and the carrier bandwidth includes an indication of the DPSK constellation.

[0054] In some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein, the channel access mode group includes a single-carrier channel access mode and a multi-carrier channel access mode.

[0055] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: identifying a peak-to-average power (PAPR) threshold for communicating on the radio frequency spectrum band; identifying a first PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and a first DPSK constellation having a first order; and identifying a second PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and a second DPSK constellation having a second order, the second order may be greater than the first order, wherein the data set may be modulated according to the second DPSK constellation based on the second PAPR being lower than the PAPR threshold.

[0056] Some examples of the methods, devices (apparatus), and non-transitory computer-readable media described herein may further include operations, features, apparatus, or instructions for the following actions: transmitting a request to the transmitting device to disable transmission of a demodulation reference signal based on a delay profile associated with communicating on the radio frequency spectrum band using a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode; and receiving a portion of the data set on resources allocated for the demodulation reference signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1

[0013] An example of a system for wireless communication that supports selection of a transmission configuration in accordance with aspects of the present disclosure is illustrated.

[0059] Figure 2 An example of a process flow that supports selecting a transport configuration in accordance with aspects of the present disclosure is illustrated.

[0060] Figure 3A and 3B An example radio frequency (RF) chain that supports selecting a transmission configuration in accordance with aspects of the present disclosure is illustrated.

[0061] Figure 4 and 5 A block diagram of a device supporting selection of a transmission configuration according to aspects of the present disclosure is shown.

[0062] Figure 6 A block diagram of a communication manager supporting selection of a transmission configuration in accordance with aspects of the present disclosure is shown.

[0063] Figure 7 A diagram of a system including a device that supports selecting a transmission configuration in accordance with aspects of the present disclosure is shown.

[0064] Figure 8 and 9 A block diagram of a device supporting selection of a transmission configuration according to aspects of the present disclosure is shown.

[0065] Fig.10 A block diagram of a communication manager supporting selection of a transmission configuration in accordance with aspects of the present disclosure is shown.

[0066] Fig.11 A diagram of a system including a device that supports selecting a transmission configuration in accordance with aspects of the present disclosure is shown.

[0067] Fig.12 and 13 A flow chart illustrating a method of supporting selection of a transmission configuration according to aspects of the present disclosure is shown.

[0068] Detailed Description

[0069] Coherent modulation techniques (e.g., phase shift keying (PSK), amplitude phase shift keying (APSK), quadrature amplitude modulation (QAM), etc.) and non-coherent modulation techniques (e.g., differential phase shift keying (DPSK), differential amplitude phase shift keying (DAPSK), etc.) may be supported by wireless devices. To support coherent modulation techniques, the transmitting device and the receiving device may keep track of a common phase reference. Without using a common phase reference, non-coherent communication may be performed. In addition, single carrier channel access mode (e.g., single carrier frequency domain multiple access (SC-FDMA)) and multi-carrier channel access modes (e.g., orthogonal frequency domain multiple access (OFDMA)) may be supported by the wireless device. SC-FDMA techniques may be used in conjunction with coherent modulation such as quadrature phase shift keying (QPSK) (which may be equivalent to 4-QAM), 8-QAM, 16-QAM, etc.). The peak-to-average power ratio (PAPR) of transmissions using SC-FDMA techniques ("single carrier frequency domain multiplexing (SC-FDM) transmissions") may, on average, be lower than the PAPR of transmissions using OFDMA techniques ("orthogonal frequency domain multiplexing (OFDM) transmissions").

[0070] Information can be communicated between wireless devices across a wide frequency range, including lower spectrum bands, such as submillimeter wave (mmW) (less than about 6 GHz) spectrum bands, and high-frequency spectrum bands, such as mmW (greater than about 6 GHz) and sub-terahertz (between 100 and 300 GHz) spectrum bands. In high spectrum bands, the performance of coherent modulation may be significantly degraded due to increased levels of phase noise (noise associated with detecting the phase of received modulated symbols), carrier frequency offset, or both.

[0071] The SC-FDM transmission mode can be used in conjunction with higher order QAM techniques to increase throughput. However, as the QAM order increases, the PAPR of the SC-FDM transmission may increase. In order to support higher modulation orders and corresponding increased PAPR, the power amplifier can be configured with a larger backoff. Alternatively (e.g., in high frequency bands), SC-FDM transmission can be limited to using QPSK modulation (or 4-QAM) techniques, thereby reducing the throughput of SC-FDM transmission in high frequency bands.

[0072] In order to improve the performance of communication in the high spectrum band and alleviate the impact of phase noise, non-coherent modulation technology can be used when performing communication on the high spectrum band. In some examples, DPSK modulation technology can be used for communication performed on the high spectrum band. In some examples, when the phase noise associated with communicating in the high spectrum band exceeds a threshold (e.g., a predetermined threshold) and / or when the modulation and coding scheme (MCS) selected for communicating in the high spectrum band exceeds another threshold (e.g., another predetermined threshold), DPSK modulation technology can be used for communication. By using DPSK modulation technology for communication on the high spectrum band, the impact of phase noise can be ignored, thereby increasing the reliability of communication performed on the high spectrum band.

[0073] Additionally or alternatively, in order to improve the performance of communications and reduce PAPR in high frequency spectrum bands, the SC-FDM transmission mode can be used in conjunction with a higher order PSK modulation technique. Unlike using a higher order QAM with SC-FDM transmission, the PAPR of the SC-FDM transmission can be improved (or at least not increased) when a higher order PSK modulation technique is used - for example, due to the smoother upsampling of the higher order PSK modulation relative to the lower order PSK modulation (such as QPSK). In some examples, the higher order PSK modulation technique is used in conjunction with the SC-FDM transmission based on the amount of upsampling performed during the generation of the SC-FDM transmission - for example, the PSK modulation order can increase as the amount of upsampling increases. Thus, by using a higher order PSK modulation with the SC-FDM transmission mode, the throughput of the SC-FDM communication can be increased while improving the PAPR.

[0074] In some examples, in order to further improve the performance of communications in high frequency bands, the SC-FDM transmission mode can be used in conjunction with a higher order DPSK modulation technique. By using a higher order DPSK modulation in conjunction with the SC-FDM transmission mode, the effects of phase noise at higher frequencies can be mitigated and the throughput of SC-FDM communications can be increased while improving the PAPR.

[0075] Various aspects of the present disclosure are initially described in the context of a wireless communication system. A specific example of a process flow for selecting a transmission configuration is subsequently described. Various aspects of the present disclosure are further illustrated and described by and with reference to apparatus diagrams, system diagrams, and flow diagrams related to selecting a transmission configuration.

[0076] Figure 1 An example of a wireless communication system that supports selecting a transmission configuration according to various aspects of the present disclosure is illustrated. The wireless communication system 100 may include one or more base stations 105, one or more UEs 115, and a core network 130. In some examples, the wireless communication system 100 may be a long term evolution (LTE) network, an advanced LTE (LTE-A) network, an LTE-A Pro network, or a new radio (NR) network. In some examples, the wireless communication system 100 may support enhanced broadband communications, ultra-reliable (e.g., mission-critical) communications, low latency communications, communications with low-cost and low-complexity devices, or any combination thereof.

[0077] The base stations 105 may be dispersed throughout a geographic area to form the wireless communication system 100, and may be different forms of devices or devices with different capabilities. The base stations 105 and the UEs 115 may communicate wirelessly via one or more communication links 125. Each base station 105 may provide a coverage area 110 over which the UEs 115 and the base stations 105 may establish one or more communication links 125. The coverage area 110 may be an example of a geographic area over which the base stations 105 and the UEs 115 may support communication of signals according to one or more radio access technologies.

[0078] The UEs 115 may be dispersed throughout the coverage area 110 of the wireless communication system 100, and each UE 115 may be stationary or mobile, or stationary and mobile at different times. The UEs 115 may be different forms of devices or devices with different capabilities. Figure 1 Some example UEs 115 are illustrated in FIG. 1. The UEs 115 described herein may be capable of communicating with various types of devices, such as other UEs 115, base stations 105, or network equipment (e.g., core network nodes, relay devices, integrated access and backhaul (IAB) nodes, or other network equipment), such as Figure 1 as shown in .

[0079] Each base station 105 may communicate with the core network 130, or communicate with each other, or both. For example, the base station 105 may interface with the core network 130 via one or more backhaul links 120 (e.g., via S1, N2, N3, or another interface). The base stations 105 may communicate with each other directly (e.g., directly between the base stations 105), or indirectly (e.g., via the core network 130), or directly and indirectly on the backhaul link 120 (e.g., via X2, Xn, or other interfaces). In some examples, the backhaul link 120 may be or include one or more wireless links.

[0080] One or more of the base stations 105 described herein may include or may be referred to by a person of ordinary skill in the art as a base transceiver station, a radio base station, an access point, a radio transceiver, a B node, an evolved B node (eNB), a next generation B node or a gigabit B node (any of which may be referred to as a gNB), a home B node, a home evolved B node, or other suitable terminology.

[0081] UE 115 may include or may be referred to as a mobile device, a wireless device, a remote device, a handheld device, or a subscriber device, or some other suitable term, where a "device" may also be referred to as a unit, a station, a terminal, or a client, etc. UE 115 may also include or may be referred to as a personal electronic device, such as a cellular phone, a personal digital assistant (PDA), a tablet computer, a laptop computer, or a personal computer. In some examples, UE 115 may include or be referred to as a wireless local loop (WLL) station, an Internet of Things (IoT) device, an Internet of Everything (IoE) device, or a machine type communication (MTC) device, etc., which may be implemented in various objects such as electrical appliances or vehicles, meters, etc.

[0082] The UE 115 described herein may be able to communicate with various types of devices, such as other UEs 115, which may sometimes act as relays, as well as base stations 105 and network equipment including macro eNBs or gNBs, small cell eNBs or gNBs, relay base stations, etc. Figure 1 as shown in .

[0083] The UE 115 and the base station 105 may communicate wirelessly with each other via one or more communication links 125 on one or more carriers. The term "carrier" may refer to a set of radio frequency spectrum resources having a defined physical layer structure for supporting the communication link 125. For example, a carrier for the communication link 125 may include a portion of a radio frequency spectrum band (e.g., a bandwidth portion (BWP)) that operates according to one or more physical layer channels for a given radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR). Each physical layer channel may carry acquisition signaling (e.g., synchronization signals, system information), control signaling for coordinating carrier operations, user data, or other signaling. The wireless communication system 100 may support communication with the UE 115 using carrier aggregation or multi-carrier operation. The UE 115 may be configured to have multiple downlink component carriers and one or more uplink component carriers according to a carrier aggregation configuration. Carrier aggregation may be used in conjunction with both frequency division duplex (FDD) and time division duplex (TDD) component carriers.

[0084] In some examples (e.g., in a carrier aggregation configuration), a carrier may also have acquisition signaling or control signaling that coordinates the operation of other carriers. A carrier may be associated with a frequency channel (e.g., an Evolved Universal Mobile Telecommunications System Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN)) and may be located according to a channel grid for discovery by UE 115. A carrier may operate in a standalone mode in which initial acquisition and connection may be made by UE 115 via the carrier, or a carrier may operate in a non-standalone mode in which a connection is anchored using a different carrier (e.g., a different carrier of the same or different radio access technology).

[0085] The communication link 125 shown in the wireless communication system 100 may include an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. A carrier may carry downlink or uplink communications (e.g., in an FDD mode), or may be configured to carry both downlink and uplink communications (e.g., in a TDD mode).

[0086] A carrier may be associated with a particular bandwidth of a radio frequency spectrum, and in some examples, the carrier bandwidth may be referred to as a "system bandwidth" of the carrier or wireless communication system 100. For example, the carrier bandwidth may be one of several determined bandwidths (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 megahertz (MHz)) of a carrier of a particular radio access technology. Devices (e.g., base stations 105, UEs 115, or both) of the wireless communication system 100 may have a hardware configuration that supports communications on a particular carrier bandwidth, or may be configurable to support communications on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include a base station 105 or UE 115 that supports simultaneous communications via carriers associated with multiple carrier bandwidths. In some examples, each served UE 115 may be configured to operate on a portion (e.g., subband, BWP) or all of a carrier bandwidth.

[0087] The signal waveform transmitted on the carrier may include multiple subcarriers (e.g., using multi-carrier modulation (MCM) techniques, such as OFDM or discrete Fourier transform spread OFDM (DFT-S-OFDM)). In a system using MCM techniques, a resource element may include a code element period (e.g., the duration of a modulation code element) and a subcarrier, where the code element period and the subcarrier spacing are inversely related. The number of bits carried by each resource element may depend on the modulation scheme (e.g., the order of the modulation scheme, the code rate of the modulation scheme, or both). Thus, the more resource elements received by the UE 115 and the higher the order of the modulation scheme, the higher the data rate of the UE 115 can be. Wireless communication resources may refer to a combination of radio frequency spectrum resources, time resources, and spatial resources (e.g., spatial layers or beams), and the use of multiple spatial layers may further improve the data rate or data integrity of communications with the UE 115.

[0088] One or more parameter designs for a carrier may be supported, where the parameter designs may include subcarrier spacing (Δf) and cyclic prefixes. A carrier may be divided into one or more BWPs with the same or different parameter designs. In some examples, a UE 115 may be configured with multiple BWPs. In some examples, a single BWP for a carrier may be active at a given time, and communications for a UE 115 may be limited to the one or more active BWPs.

[0089] The time interval of the base station 105 or the UE 115 can be expressed as a multiple of a basic time unit, and the basic time unit can be, for example, a sampling period T s =1 / (△f max ·N f ) seconds, where △f max It can represent the maximum supported subcarrier spacing, and N fThe maximum supported discrete Fourier transform (DFT) size may be indicated. Time intervals of communication resources may be organized according to radio frames, each having a specified duration (e.g., 10 milliseconds (ms)). Each radio frame may be identified by a system frame number (SFN) (e.g., ranging from 0 to 1023).

[0090] Each frame may include a plurality of consecutively numbered subframes or time slots, and each subframe or time slot may have the same duration. In some examples, a frame may be divided into subframes (e.g., in the time domain), and each subframe may be further divided into a number of time slots. Alternatively, each frame may include a variable number of time slots, and the number of time slots may depend on the subcarrier spacing. Each time slot may include a number of code element periods (e.g., depending on the length of the cyclic prefix added before each code element period). In some wireless communication systems 100, a time slot may be further divided into a plurality of mini-time slots containing one or more code elements. Excluding the cyclic prefix, each code element period may contain one or more (e.g., N f The duration of a symbol period may depend on the subcarrier spacing or the operating band.

[0091] A subframe, slot, mini-slot, or symbol may be the smallest scheduling unit (e.g., in the time domain) of the wireless communication system 100 and may be referred to as a transmission time interval (TTI). In some examples, the TTI duration (e.g., the number of symbol periods in a TTI) may be variable. Additionally or alternatively, the smallest scheduling unit of the wireless communication system 100 may be dynamically selected (e.g., in bursts of shortened TTIs (sTTIs)).

[0092] Physical channels may be multiplexed on a carrier according to various techniques. Physical control channels and physical data channels may be multiplexed on a downlink carrier, for example, using one or more of a time division multiplexing (TDM) technique, a frequency division multiplexing (FDM) technique, or a hybrid TDM-FDM technique. A control region (e.g., a control resource set (CORESET)) for a physical control channel may be defined by a number of symbol periods and may extend across a system bandwidth or a subset of a system bandwidth of a carrier. One or more control regions (e.g., CORESETs) may be configured for a set of UEs 115. For example, one or more of the UEs 115 may monitor or search a control region for control information according to one or more search space sets, and each search space set may include one or more control channel candidates in one or more aggregation levels arranged in a cascaded manner. An aggregation level for a control channel candidate may refer to the number of control channel resources (e.g., control channel elements (CCEs)) associated with coded information for a control information format having a given payload size. The search space sets may include a common search space set configured for transmitting control information to multiple UEs 115 and a UE-specific search space set for transmitting control information to a specific UE 115 .

[0093] In some examples, base stations 105 may be mobile and, therefore, provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies may overlap, but the different geographic coverage areas 110 may be supported by the same base station 105. In other examples, overlapping geographic coverage areas 110 associated with different technologies may be supported by different base stations 105. The wireless communication system 100 may include, for example, a heterogeneous network in which different types of base stations 105 provide coverage for various geographic coverage areas 110 using the same or different radio access technologies.

[0094] The wireless communication system 100 may be configured to support ultra-reliable communication or low latency communication or various combinations thereof. For example, the wireless communication system 100 may be configured to support ultra-reliable low latency communication (URLLC) or mission-critical communication. UE 115 may be designed to support ultra-reliable, low latency or critical functions (e.g., mission-critical functions). Ultra-reliable communication may include private communication or group communication, and may be supported by one or more mission-critical services (such as mission-critical push-to-talk (MCPTT), mission-critical video (MCVideo), or mission-critical data (MCData). Support for mission-critical functions may include prioritization of services, and mission-critical services may be used for public safety or general commercial applications. The terms ultra-reliable, low latency, critical mission, and ultra-reliable low latency may be used interchangeably herein.

[0095] In some examples, UE 115 may also be able to communicate directly with other UE 115 over a device-to-device (D2D) communication link 135 (e.g., using a peer-to-peer (P2P) or D2D protocol). One or more UEs 115 utilizing D2D communication may be within a geographic coverage area 110 of a base station 105. Other UEs 115 in such a group may be outside the geographic coverage area 110 of the base station 105, or may not be able to receive transmissions from the base station 105 for other reasons. In some examples, each group of UEs 115 communicating via D2D communication may utilize a one-to-many (1:M) system, in which each UE 115 transmits to each other UE 115 in the group. In some examples, the base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between each UE 115 without involving the base station 105.

[0096] The core network 130 may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. The core network 130 may be an evolved packet core (EPC) or a 5G core (5GC), and the EPC or 5GC may include at least one control plane entity (e.g., a mobility management entity (MME), an access and mobility management function (AMF)) for managing access and mobility, and at least one user plane entity (e.g., a serving gateway (S-GW), a packet data network (PDN) gateway (P-GW), or a user plane function (UPF)) for routing packets or interconnecting to an external network. The control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management of UE 115 served by a base station 105 associated with the core network 130. User IP packets may be delivered via a user plane entity, which may provide IP address allocation and other functions. The user plane entity may be connected to a network operator IP service 150. Operator IP services 150 may include access to the Internet, an intranet, an IP Multimedia Subsystem (IMS), or packet-switched streaming services.

[0097] Some network devices (such as base stations 105) may include subcomponents, such as access network entities 140, which may be examples of access node controllers (ANCs). Each access network entity 140 may communicate with each UE 115 through one or more other access network transport entities 145, which may be referred to as radio heads, smart radio heads, or transmission / reception points (TRPs). Each access network transport entity 145 may include one or more antenna panels. In some configurations, the various functions of each access network entity 140 or base station 105 may be distributed across various network devices (e.g., radio heads and ANCs) or merged into a single network device (e.g., base station 105).

[0098] The wireless communication system 100 may operate using one or more frequency bands, typically in the range of 300 megahertz (MHz) to 300 gigahertz (GHz). In general, the 300 MHz to 3 GHz region is referred to as the ultra-high frequency (UHF) region or decimeter band because the wavelengths range from about 1 decimeter to 1 meter long. UHF waves may be blocked or redirected by buildings and environmental features, but these waves may penetrate various structures sufficiently for macro cells to provide service to UEs 115 located indoors. Transmissions using UHF waves may be associated with smaller antennas and shorter ranges (e.g., less than 100 kilometers) than transmissions using smaller frequencies and longer waves in the high frequency (HF) or very high frequency (VHF) portions of the spectrum below 300 MHz.

[0099] The wireless communication system 100 may also operate in a super high frequency (SHF) zone using a frequency band from 3 GHz to 30 GHz (also known as a centimeter band) or in an extremely high frequency (EHF) zone of a spectrum (e.g., from 30 GHz to 300 GHz) (also known as a millimeter band). In some examples, the wireless communication system 100 may support millimeter wave (mmW) communications between UE 115 and base station 105, and the EHF antenna of the corresponding device may be smaller and more closely spaced than the UHF antenna. In some examples, this may facilitate the use of antenna arrays within the device. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and a shorter range than SHF or UHF transmissions. The technology disclosed herein may be adopted across transmissions using one or more different frequency zones, and the use of frequency bands specified across these frequency zones may vary by country or regulatory agency.

[0100] The wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, the wireless communication system 100 may employ licensed assisted access (LAA), LTE unlicensed (LTE-U) radio access technology, or NR technology in an unlicensed band (such as the 5 GHz industrial, scientific, and medical (ISM) band). When operating in an unlicensed radio frequency spectrum band, devices (such as base stations 105 and UEs 115) may employ carrier sensing for conflict detection and avoidance. In some examples, operations in an unlicensed band may be based on a carrier aggregation configuration (e.g., LAA) in coordination with component carriers operating in a licensed band. Operations in an unlicensed spectrum may include downlink transmissions, uplink transmissions, P2P transmissions, or D2D transmissions, among others.

[0101] The base station 105 or UE 115 may be equipped with multiple antennas, which can be used to employ technologies such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communications, or beamforming. The antennas of the base station 105 or UE 115 may be located in one or more antenna arrays or antenna panels that can support MIMO operations or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly (such as an antenna tower). In some examples, the antennas or antenna arrays associated with the base station 105 may be located at different geographical locations. The base station 105 may have an antenna array having antenna ports of several rows and columns that the base station 105 can use to support beamforming for communications with the UE 115. Similarly, the UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations. Additionally or alternatively, the antenna panel may support radio frequency beamforming for signals transmitted via the antenna ports.

[0102] The base station 105 or UE 115 can use MIMO communication to utilize multipath signal propagation and improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers. Such technology may be referred to as spatial multiplexing. For example, the transmitting device may transmit multiple signals via different antennas or different antenna combinations. Similarly, the receiving device may receive multiple signals via different antennas or different antenna combinations. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams (e.g., different codewords). Different spatial layers may be associated with different antenna ports for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO), in which multiple spatial layers are transmitted to the same receiving device; and multi-user MIMO (MU-MIMO), in which multiple spatial layers are transmitted to multiple devices.

[0103] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique that may be used at a transmitting device or a receiving device (e.g., a base station 105, a UE 115) to shape or steer an antenna beam (e.g., a transmit beam, a receive beam) along a spatial path between the transmitting device and the receiving device. Beamforming may be achieved by combining signals communicated via antenna elements of an antenna array so that some signals propagating at a particular orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to signals communicated via antenna elements may include the transmitting device or the receiving device applying an amplitude offset, a phase offset, or both to signals carried via antenna elements associated with the device. Adjustments associated with each antenna element may be defined by a set of beamforming weights associated with a particular orientation (e.g., relative to the antenna array of the transmitting device or the receiving device, or relative to some other orientation).

[0104] The wireless communication system 100 may support multiple types of modulation techniques for communicating data between transmitting and receiving devices. Different types of modulation techniques may map logical values ​​to different sets of modulation symbols, each of which may be associated with a unique amplitude and / or phase. Different techniques may include coherent and / or incoherent modulation techniques. For coherent modulation techniques, each modulation symbol may be associated with a corresponding amplitude and a corresponding phase (e.g., one of 0, 90, 180, or 270 degrees). In addition, for coherent modulation techniques, the transmitting device and the receiving device may keep track of a common phase reference so that the phase determined by the receiving device for the received modulation symbol corresponds to the phase used by the transmitting device to transmit the modulation symbol. In some examples, the transmitting device and the receiving device use a phase-locked loop to maintain a common phase reference and accommodate phase drift that may occur during operation. For incoherent modulation techniques, each modulated symbol may be associated with a corresponding amplitude and a "relative phase". Thus, for non-coherent modulation techniques, the transmitting device and the receiving device may not keep track of a common phase reference—for example, because the receiving device may use the relative phase difference between consecutive modulated code elements (rather than the actual phase of the received modulated code elements) to determine the logical value associated with the received code elements.

[0105] Reference signals may be used to support coherent modulation. For example, a phase tracking reference signal (PTRS) may be transmitted by a transmitting device and used by a receiving device to lock onto a phase reference being used by the transmitting device. The transmitting device may transmit the PTRS on dedicated communication resources, which may increase overhead and reduce throughput for communication. In some examples, PTRS transmission may reduce throughput for communication (e.g., by up to or about five percent).

[0106] Different types of modulation techniques include PSK modulation, APSK modulation, QAM, DPSK modulation, and DAPSK modulation. PSK modulation and QAM may be associated with coherent modulation, while DPSK modulation may be associated with incoherent modulation. A first set of PSK modulation techniques (which may be referred to as PSK modulation) may be associated with a set of modulation symbols having the same amplitude and a unique phase distributed across an available phase range (e.g., across a 360 degree or 2π radian range). A first set of PSK modulation techniques may include a binary phase shift keying (BPSK) modulation technique (which may include two modulation symbols), a QPSK modulation technique (which may include four modulation symbols), 8-PSK (which may include eight modulation symbols), and the like. In some cases, the order of the modulation technique may be based on the number of modulation symbols supported by the modulation technique—for example, QPSK may be a fourth-order modulation technique. Another set of PSK modulation techniques (which may be referred to as APSK modulation) may be associated with a first set of modulation symbols having a first amplitude and a unique phase and a second set of modulation symbols having a different (e.g., larger) amplitude and unique phase. QAM techniques may be associated with sets of modulation symbols having different amplitude and phase combinations and being equidistant from one another. Different QAM techniques may include different numbers of modulation symbols (e.g., 4-QAM, 8-QAM, 16-QAM, 32-QAM, etc.). In some cases, 4-QAM may be equivalent to QPSK modulation.

[0107] The first set of DPSK modulation techniques (which may be referred to simply as DPSK modulation) may be associated with a set of modulation symbols having the same amplitude and a unique "relative phase" distributed across an available phase range. Unlike PSK modulation, the actual phase associated with a DPSK symbol may vary over time, while the relative phase (or phase difference) between DPSK symbols may remain constant. The modulated DPSK symbol may be represented as x k =x k-1 s k , k ≥ 0, where x k refers to the kth modulated codeword, x k-1 refers to the k-1th modulated codeword, and s k Refers to the kth data symbol, assuming x -1 = 1. A second set of DPSK modulation techniques, which may be referred to as DAPSK, may be associated with a first set of modulation symbols having a first amplitude and a unique relative phase distributed across an available phase range and a second set of modulation symbols having a second amplitude and a unique relative phase distributed across an available phase range.

[0108] For each modulation technique, the corresponding modulation symbol pattern may be referred to as a modulation constellation. The spectral efficiency associated with a modulation constellation may be based on the distance between the modulation symbols in the modulation constellation. For example, the spectral efficiency may be higher for a modulation constellation that includes modulation symbols that are spaced farther apart (as a function of amplitude and phase) than another modulation constellation. In some cases, the spectral efficiency associated with a PSK modulation constellation that includes modulation symbols of a single amplitude decreases as more modulation symbols are added—e.g., due to a smaller distance between the modulation symbols. In contrast, the spectral efficiency associated with a QAM constellation may remain constant as more modulation symbols are added—e.g., due to a constant distance being maintained between the modulation symbols.

[0109] The wireless communication system 100 may similarly support demodulation techniques for communicating data between transmitting and receiving devices. The demodulation techniques may be used to map a received set of modulated symbols to modulation symbols of a modulation constellation and determine data values ​​associated with the modulated symbols. Mapping the modulated symbols to the modulation constellation may involve determining the amplitude and phase of the received set of modulated symbols. The demodulated DPSK symbol may be represented as z k =y k y * k-1 , where z k refers to the kth demodulated symbol, y k refers to the kth received symbol, and y * k-1 refers to the complex conjugate of the k-1th data symbol. The demodulated DPSK symbol can also be expressed as where h k refers to the channel / phase noise response, and v k refers to the noise associated with the channel. Since the characteristics of the channel are unlikely to change significantly between two symbols, the channel / phase noise response between the two symbols can be assumed to be the same - that is, the phase noise can be cancelled. Thus, z k It can be expressed as (h k x k-1 s k +v k )(h k x k-1 +v k-1 ) * The minimum mean square error combination vector Can be equal to argmin m {|∠z k -θ m | 2} and the estimated data symbol Can be equal to Other demodulation techniques can be used to estimate the data symbols Maximum likelihood decoding and iterative decoding techniques are included. Demodulation can be performed similarly for DAPSK symbols.

[0110] The wireless communication system 100 may support a variety of modes for accessing a wireless channel, including an OFDM channel access mode (which may also be referred to as OFDMA) and an SC-FDM channel access mode (which may also be referred to as SC-FDMA). A wireless device that performs transmission according to an OFDM channel access mode may be referred to as being in an OFDM transmission mode. A wireless device that performs transmission according to an SC-FDM channel access mode may be referred to as being in an SC-FDM transmission mode. The OFDM transmission mode may involve mapping each modulated symbol in a set of modulated symbols to a unique time and frequency communication resource prior to transmission on the channel. The SC-FDM transmission mode may involve spreading the set of modulated symbols across a set of frequency communication resources that occur during the same time period (e.g., a symbol period) prior to transmission on the channel. The SC-FDM transmission mode may support a localized SC-FDM transmission mode and / or a distributed SC-FDM transmission mode. The localized SC-FDM transmission mode may include mapping a set of frequency domain symbols to a set of contiguous subcarriers, where the set of subcarriers is a subset of a larger set of subcarriers included in a carrier. A distributed SC-FDM transmission mode may include mapping a frequency domain symbol set to a distributed set of subcarriers, where the set of subcarriers is distributed (e.g., uniformly) across a larger set of subcarriers included in a carrier. In some cases, a signal transmitted during a symbol period according to an OFDM transmission mode may be referred to as an OFDM symbol. And a signal transmitted during a symbol period according to an SC-FDM transmission mode may be referred to as an SC-FDM symbol.

[0111] Reference signals can be used to support OFDM and SC-FDMA transmissions. For example, a demodulation reference signal (DMRS) can be transmitted by a transmitting device and used by a receiving device for time domain equalization. That is, the signal components of an OFDM symbol or SC-FDM symbol transmitted on different subcarriers during a symbol period can arrive at the receiving device at different times. The receiving device can use DMRS to resolve and / or adjust the delays between different signal components, thereby increasing the likelihood that an OFDM symbol or SC-FDM symbol will be successfully decoded. The transmitting device can transmit DMRS on dedicated communication resources, which may increase overhead and reduce throughput for communication.

[0112] The transmission chain used to transmit SC-FDM transmission may include multiple stages. The first stage of the transmission chain (e.g., a data modulator) may be used to map data to modulated symbols of a selected modulation constellation. The second stage of the transmission chain (e.g., a serial-to-parallel converter) may be used to select a modulated symbol set from a modulated symbol stream. The third stage of the transmission chain (e.g., a DFT) may be used to generate a frequency domain symbol set corresponding to the modulated symbol set. The fourth stage of the transmission chain may be used to map the frequency domain symbol set to a subcarrier set assigned to a transmitting device. The fifth stage of the transmission chain (e.g., an inverse discrete Fourier transform (IDFT)) may be used to convert the mapped frequency domain symbol into a time domain signal based on a subcarrier set. The sixth stage of the transmission chain (e.g., a parallel-to-serial converter) may be used to complete the construction of the time domain signal. The seventh stage of the transmission chain may be used to add a cyclic prefix to the time domain signal. The seventh stage of the transmission chain may also be used to apply pulse shaping to the time domain signal, which may include oversampling and interpolating the time domain signal. The eighth stage of the transmit chain may be used to transmit a pulse shaped time domain signal - ie, a SC-FDM transmission.The transmit chain used to transmit an OFDM transmission may be similarly configured, but the third stage (eg, DFT) of the SC-FDM transmit chain may be excluded.

[0113] The transmitting device may use a power amplifier to amplify the signal before transmission. In order to avoid introducing nonlinearity into the transmitted signal, the power amplifier may be configured with a backoff so that the power amplifier operates mainly in the linear region. The backoff amount configured for the power amplifier may be based on the expected PAPR of the transmission. The PAPR indicates the difference between the peak power and the average power used to transmit the signal on the channel. In other words, the power amplifier may be configured to operate in a lower operating region on average so that the power amplifier avoids entering the nonlinear region when transmitting at peak power-for example, if the PAPR is equal to two, the power amplifier may be configured to operate in an area of ​​half the upper limit of the linear operating region of the power amplifier on average. Thus, as the PAPR decreases, the backoff amount configured for the power amplifier may also be reduced, thereby improving efficiency and reducing the complexity of the power amplifier.

[0114] A transmission performed using the SC-FDM transmission mode may have a lower PAPR than a transmission performed using the OFDM transmission mode - for example, based on mixing the modulated codeword sets together before mapping the modulated codeword sets to the frequency resource sets. In some cases, the PAPR associated with the SC-FDM transmission may be based on the modulation technique used in conjunction with the SC-FDM transmission mode. In some examples, the SC-FDM transmission mode may use QPSK modulation (or 4-QAM). In other examples, the SC-FDM transmission mode may use a higher order QAM (e.g., 8-QAM or 16-QAM). The PAPR associated with the SC-FDM transmission may increase with an increase in the QAM order. For example, the PAPR of the SC-FDM transmission mode using 16-QAM may be at least one decibel (dB) higher than the PAPR in the case of using QPSK (or 4-QAM) - for example, due to the higher amplitude used to represent the additional modulation codewords. The PAPR associated with an SC-FDM transmission may also be based on the amount (or rate) of upsampling that occurs during generation of the SC-FDM transmission - for example, the PAPR for the same modulation technique (e.g., QPSK) may increase as the amount of upsampling increases. In some cases, the amount of upsampling is based on the size of the frequency resource set allocated to the transmission (e.g., the number of subcarriers) and the size of the carrier associated with the transmission (e.g., the carrier bandwidth) - for example, the amount of upsampling may increase with the size of the frequency resource set (i.e., with the size of the resource allocation) and / or with the size of the carrier.

[0115] The wireless communication system 100 can support communications over a wide range of frequency bands, including sub-mmW bands (e.g., <6 GHz), mmW bands (e.g., between 6 GHz and 100 GHz), and / or sub-terahertz (e.g., between 100 and 300 GHz). The mmW and sub-terahertz bands may be referred to as high frequency bands. In high frequency bands, the channel between the transmitting device and the receiving device may be close to a single-tap (or flat) channel. Therefore, all or most of the signal components of an OFDM symbol transmission or an SC-FDM symbol transmission (e.g., components of an OFDM or SC-FDM symbol transmitted on different subcarriers) may be received at the receiving device almost simultaneously.

[0116] In the high frequency band, phase noise (noise associated with detecting the phase of the received modulated code element (such as OFDM or SC-FDMA code element)) may become larger-for example, due to the high phase change rate occurring at high frequency. In addition, in the high frequency band, the frequency carrier offset (the difference between the carrier frequency used to up-convert the information signal and the carrier frequency used to down-convert the information signal) may become larger. In some cases, the performance of coherent communication may be significantly degraded in the high frequency band due to increased phase noise and / or carrier frequency offset. When the communication failure rate exceeds a threshold value (for example, a predetermined threshold), the performance of coherent communication may be considered to be significantly degraded. In addition, in the high frequency band, the negative impact of increased PAPR on transmission may increase. In some cases, when communicating on the high frequency band, the transmitting party device may suppress the use of the SC-FDM transmission mode using the higher order QAM constellation associated with the increased PAPR. For example, the SC-FDM transmission mode may be limited to being used in conjunction with QPSK modulation within a higher frequency range. Limiting the SC-FDM transmission mode to QPSK modulation may reduce the throughput of SC-FDM communications performed on high frequency bands.

[0117] In order to improve the performance of communication in the high spectrum band and alleviate the impact of phase noise, non-coherent modulation technology can be used when performing communication on the high spectrum band. In some examples, DPSK modulation technology can be used for communication performed on the high spectrum band. In some examples, when the phase noise associated with communicating in the high spectrum band exceeds a threshold (e.g., a predetermined threshold) and / or when the modulation and coding scheme (MCS) selected for communicating in the high spectrum band exceeds another threshold (e.g., another predetermined threshold), DPSK modulation technology can be used for communication. By using DPSK modulation technology for communication on the high spectrum band, the impact of phase noise can be ignored, thereby increasing the reliability of communication performed on the high spectrum band.

[0118] Additionally or alternatively, in order to improve the performance of communications and reduce PAPR in high frequency spectrum bands, the SC-FDM transmission mode can be used in conjunction with a higher order PSK modulation technique. Unlike using a higher order QAM with SC-FDM transmission, the PAPR of the SC-FDM transmission can be improved (or at least not increased) when a higher order PSK modulation technique is used - for example, due to the smoother upsampling of the higher order PSK modulation relative to the lower order PSK modulation (such as QPSK). In some examples, the higher order PSK modulation technique is used in conjunction with the SC-FDM transmission based on the amount of upsampling performed during the generation of the SC-FDM transmission - for example, the PSK modulation order can increase as the amount of upsampling increases. Thus, by using a higher order PSK modulation with the SC-FDM transmission mode, the throughput of the SC-FDM communication can be increased while improving the PAPR.

[0119] In some examples, in order to further improve the performance of communications in high frequency bands, the SC-FDM transmission mode can be used in conjunction with a higher order DPSK modulation technique. By using a higher order DPSK modulation in conjunction with the SC-FDM transmission mode, the effects of phase noise at higher frequencies can be mitigated and the throughput of SC-FDM communications can be increased while improving the PAPR.

[0120] Figure 2 Various aspects of a process for selecting a transmission configuration in accordance with various aspects of the present disclosure are illustrated.

[0121] In some examples, process flow 200 illustrates an exemplary sequence of operations performed to support selection of a transmission configuration. For example, the process flow depicts control signaling (e.g., radio resource control (RRC) signaling) that may be exchanged and processing that may be performed to support selection of a transmission configuration. Those skilled in the art will appreciate that one or more operations described in process flow 200 may be performed earlier or later in the process, omitted, replaced, supplemented, or any combination thereof. Also, additional operations described herein that are not included in process flow 200 may be included. Process flow 200 may be performed by a transmitting device 205 and a receiving device 215.

[0122] The transmitting device 205 may be a base station or a UE, as shown in FIG. Figure 1 The receiving device 215 may be a base station or a UE, as described in reference Figure 1 When the transmitting device 205 is a UE, the transmission from the transmitting device 205 may be referred to as an uplink transmission. When the transmitting device 205 is a base station, the transmission from the transmitting device 205 may be referred to as a downlink transmission. Based on whether the receiving device 215 is a UE or a base station, the transmission from the receiving device 215 may be similarly classified as a downlink or uplink transmission.

[0123] At 220, the transmitting device 205 and the receiving device 215 may exchange control signaling (e.g., RRC signaling). The receiving device 215 may signal the ability to perform SC-FDM transmission using the DPSK modulation technique—for example, when the receiving device 215 is a UE. The transmitting device 205 may transmit a control message that configures the receiving device 215 to perform SC-FDM transmission using the DPSK modulation technique—for example, when the transmitting device 205 is a base station. The transmitting device 205 may also transmit a control message that configures the receiving device 215 to perform communications on a set of spectrum bands (including, but not limited to, high spectrum bands)—for example, when the transmitting device 205 is a base station.

[0124] The transmitting device 205 may transmit an indication to the receiving device 215, indicating that the transmitting device 205 is configured to perform subsequent transmissions by using the SC-FDM transmission mode in conjunction with the DPSK modulation technique. In some examples, the transmitting device 205 may transmit a message to the receiving device 215 indicating parameters for determining when to use the SC-FDM transmission mode in conjunction with the DPSK modulation. For example, the transmitting device 205 may transmit an indication to the receiving device 215 indicating that the transmitting device 205 is configured to perform subsequent transmissions by using the SC-FDM transmission mode in conjunction with the DPSK modulation technique for a set of spectrum bands. The indication may further indicate that when one of a set of MCS values ​​is selected, subsequent transmissions using the SC-FDM transmission mode in conjunction with the DPSK modulation technique are used for the set of spectrum bands. The indication may further indicate that when the phase noise exceeds a threshold (e.g., a predetermined threshold), subsequent transmissions using the SC-FDM transmission mode in conjunction with the DPSK modulation technique are used for the set of spectrum bands.

[0125] At 225, the transmitting device 205 may determine a spectrum band on which to schedule or to schedule a subsequent transmission to the receiving device 215. In some examples, the transmitting device 205 determines that the transmission is to be transmitted using a carrier in a high spectrum band (e.g., a mmW or sub-terahertz spectrum band). In some cases, the transmitting device 205 determines based on the exchanged control signaling that the communication between the transmitting device 205 and the receiving device 215 is to be performed on the high spectrum band.

[0126] At 230, the recipient device 215 may similarly determine a spectrum band over which to receive the transmission from the transmitting device 205. The recipient device 215 may also determine that the same or another spectrum band is to be used for transmissions from the recipient device 215 to the transmitting device 205.

[0127] At 235, the transmitting device 205 may determine a value associated with the MCS—e.g., based on the channel quality, delay spread, and channel matrix determined for the high frequency spectrum band. The transmitting device 205 may also determine the phase noise of the high frequency spectrum band. In some cases, the receiving device 215 may determine the characteristics of the high frequency spectrum band (including channel quality, channel type, and phase noise) based on a reference signal received at the transmitting device 205. In some cases, the transmitting device 205 determines the MCS and / or phase noise for transmission to the receiving device 215 based on a channel feedback report received from the receiving device 215—e.g., when the transmitting device 205 is a base station. The transmitting device 205 may additionally determine a resource allocation in the high frequency spectrum band for transmissions between the transmitting device 205 and the receiving device 215.

[0128] At 240, receiving device 215 may similarly determine values ​​associated with MCS, phase noise, and / or resource allocation for the transmission from transmitting device 205. In some examples, receiving device 215 may determine the resource allocation for the transmission—eg, when receiving device 215 is a base station.

[0129] At 245, the receiving device 215 may transmit a request to the transmitting device 205, requesting (or directing) the transmitting device 205 to use a non-coherent SC-FDMA transmission mode (e.g., a DPSK SC-FDMA transmission mode). In some examples, the receiving device 215 may transmit the request after determining that the phase noise associated with the communication on the high frequency spectrum is above a threshold. Additionally or alternatively, the receiving device 215 may transmit the request after determining that the MCS value determined for the communication on the high frequency spectrum is above a threshold.

[0130] At 250, the transmitting device 205 may select a non-coherent SC-FDMA transmission mode (e.g., DPSK SC-FDMA) to perform a subsequent transmission to the receiving device 215. In some cases, the transmitting device 205 may select the non-coherent SC-FDMA transmission mode based on determining that the subsequent transmission is to be performed using a high frequency spectrum band. Additionally or alternatively, the transmitting device 205 may select the non-coherent SC-FDMA transmission mode based on determining that the phase noise associated with transmitting to the receiving device 215 is above a threshold. In some cases, after determining that the transmission is to be performed on the high frequency spectrum and / or the phase noise is above the threshold, the transmitting device 205 may select the non-coherent SC-FDMA transmission mode based on determining that the MCS value for the transmission is above a threshold (e.g., above MCS_10). In some cases, after determining that the transmission is to be performed on the high frequency spectrum and / or the phase noise is above the threshold, the transmitting device 205 may select the non-coherent SC-FDMA transmission mode based on determining that the number of subcarriers allocated to the transmission is above a threshold and / or the carrier size is above a threshold. By choosing a non-coherent modulation technique, the phase noise and carrier frequency offset components between modulation symbol transmissions can be eliminated.

[0131] In some examples, the transmitting device 205 may select an SC-FDMA transmission mode using a DPSK modulation technique for a non-coherent SC-FDMA transmission mode. By selecting the DPSK modulation technique, the effects of phase noise associated with the communication between the transmitting device 205 and the receiving device 210 may be mitigated. After selecting the DPSK SC-FDMA transmission mode, the transmitting device 205 may select a modulation order (e.g., D-BPSK or D-QPSK) for the DPSK modulation used in conjunction with the SC-FDMA transmission mode. In some examples, the transmitting device 205 may select a higher modulation order (e.g., D-8PSK, D-16PSK, etc.) to reduce the PAPR of subsequent transmissions to the receiving device 215 - for example, an SC-FDMA transmission mode using 8PSK may exhibit a PAPR improvement (e.g., a PAPR improvement of about 1 dB, or less than 1 dB) relative to an SC-FDMA transmission mode using QPSK. Selecting a higher modulation order may also improve the throughput / spectral efficiency of subsequent transmissions. In some examples, the transmitting device 205 selects the modulation order based on the resource allocation and carrier bandwidth for the transmission - for example, the amount of PAPR gain between the modulation orders may be based on the size of the resource allocation and / or the size of the carrier bandwidth. In some examples, the transmitting device 205 may determine the modulation order based on a lookup table used to select the modulation order for a particular resource allocation / carrier bandwidth combination. Additionally or alternatively, the transmitting device 205 may select a modified DPSK modulation technique DAPSK to perform subsequent transmissions. The DAPSK modulation technique improves the spectral efficiency of subsequent transmissions and, like DPSK, may be used similarly to mitigate the effects of phase noise. In some cases, the PAPR of the standard DPSK modulation technique may be lower than the PAPR of the DAPSK modulation technique.

[0132] In some examples, the transmitting device 205 may select a non-coherent MIMO SC-FDMA transmission mode using DPSK modulation. The MIMO DPSK SC-FDMA transmission mode may improve the spectral efficiency of subsequent transmissions. In some cases, the PAPR of the standard DPSK SC-FDMA transmission mode may be lower than the PAPR of the MIMO DPSK SC-FDMA transmission mode.

[0133] At 255, the transmitting device 205 may disable one or more reference signal transmissions associated with subsequent transmissions. In some examples, the transmitting device 205 may disable PTRS (or other reference signals for phase tracking) transmissions associated with subsequent transmissions based on selecting a non-coherent SC-FDMA transmission mode. By disabling PTRS transmissions, the communication throughput between the transmitting device 205 and the receiving device 215 may be improved (e.g., improved to up to or about five percent). The transmitting device 205 may also disable DMRS (or other reference signals for time domain equalization) transmissions associated with subsequent transmissions based on the power delay profile of the channel. The power delay profile of the channel in the high spectrum band may be close to a single-tap (or flat) channel. That is, all (or most) components of the codeword transmission transmitted from the transmitting device 205 may arrive at the receiving device 215 within a similar (or the same) amount of time. By disabling DMRS transmissions, the communication throughput between the transmitting device 205 and the receiving device 215 may be improved (e.g., improved to up to or about five percent).

[0134] At 260, the transmitting device 205 may transmit an indication to the receiving device 215 that the non-coherent SC-FDMA transmission mode is being used for subsequent transmissions to the receiving device 215. In some cases, the indication is included in downlink control information transmitted on a control channel (eg, PDCCH) resource.

[0135] At 265, the transmitting device 205 may perform a transmission according to the selected non-coherent SC-FDMA transmission mode. The transmission may be performed on communication resources in a high frequency spectrum band. In some examples, the transmitting device 205 transmits data on communication resources that would otherwise be allocated to PTRS transmissions—for example, when PTRS transmissions are disabled. Additionally or alternatively, the transmitting device 205 transmits data on communication resources that would otherwise be allocated to DMRS transmissions—for example, when DMRS transmissions are disabled. The receiving device 215 may receive the transmission according to the selected non-coherent SC-FDMA transmission mode.

[0136] At 270, the transmitting device 205 may select a coherent modulation technique—e.g., based on the spectrum band scheduled for the subsequent transmission, the MCS value used for the subsequent transmission, the phase noise associated with the subsequent transmission, or any combination thereof. In some examples, the transmitting device 205 may select a coherent modulation scheme when the subsequent transmission is scheduled in a high spectrum band and the MCS value used for the subsequent transmission is below a threshold. In some examples, the transmitting device 205 may select a coherent modulation scheme when the phase noise is above a threshold and the MCS value used for the subsequent transmission is below a threshold. In some examples, the transmitting device 205 may select a coherent modulation scheme when the subsequent transmission is scheduled in a high spectrum band and the phase noise of the subsequent transmission is below a threshold.

[0137] In some examples, the transmitting device 205 may select a PSK modulation technique for use with the SC-FDMA transmission mode. After selecting the PSK SC-FDMA transmission mode, the transmitting device 205 may select a modulation order (e.g., BPSK or QPSK) for the PSK modulation used with the SC-FDMA transmission mode. In some examples, the transmitting device 205 may select a higher modulation order (e.g., 8PSK, 16PSK, etc.) to reduce the PAPR of subsequent transmissions to the receiving device 215. Selecting a higher modulation order may also increase the spectral efficiency of subsequent transmissions. In some examples, the transmitting device 205 selects a modulation order based on the resource allocation and carrier bandwidth for the transmission-for example, the amount of PAPR gain between the modulation orders may be based on the size of the resource allocation and / or the size of the carrier bandwidth. In some examples, the transmitting device 205 may determine the modulation order based on a lookup table used to select the modulation order for a specific resource allocation / carrier bandwidth combination. Additionally or alternatively, the transmitting device 205 may select a modified PSK modulation technique APSK to perform subsequent transmissions. APSK modulation technology can improve the spectrum efficiency of subsequent transmissions. In some cases, the PAPR of standard PSK modulation technology may be lower than the PAPR of APSK modulation technology.

[0138] At 275, the transmitting device 205 may disable one or more reference signal transmissions associated with the subsequent transmission. In some examples, the transmitting device 205 may disable DMRS transmissions associated with the subsequent transmission based on a power delay profile of the channel.

[0139] At 280, the transmitting device 205 may transmit an indication to the receiving device 215 that the coherent SC-FDMA transmission mode is being used for subsequent transmissions to the receiving device 215. In some cases, the indication is included in downlink control information transmitted on a control channel (eg, PDCCH) resource.

[0140] At 285, the transmitting device 205 may perform a transmission according to the selected coherent SC-FDMA transmission mode. The transmission may be performed on communication resources in a high frequency spectrum band. In some examples, the transmitting device 205 transmits data on communication resources that would otherwise be allocated for DMRS transmission—for example, when DMRS transmission is disabled. The receiving device 215 may receive the transmission according to the selected coherent SC-FDMA transmission mode. In some examples, the operations described at 270 to 285 may be performed instead of the operations described at 250 to 265.

[0141] In some examples, instead of selecting the coherent SC-FDMA transmission mode at 270, the transmitting device 205 can select the OFDMA transmission mode—e.g., based on the spectrum band scheduled for the subsequent transmission, the MCS value for the subsequent transmission, the phase noise associated with the subsequent transmission, or any combination thereof. The transmitting device 205 can indicate to the receiving device 215 that the OFDMA transmission mode is selected.

[0142] Figure 3A Various aspects of a radio frequency (RF) chain for selecting a transmission configuration in accordance with various aspects of the present disclosure are illustrated.

[0143] The transmit chain 300-a may be configured to generate an SC-FDMA transmission that conveys a data set in a symbol period of a time slot. The transmit chain 300-a may include a modulation component 310-a, a DFT component 315-a, a subcarrier mapping component 320-a, an IDFT component 325-a, a signal processing component 330-a, and a transmit component 335-a.

[0144] The modulation component 310-a can be configured to map data (e.g., 1 or more bits of data) to modulation symbols in a modulation constellation corresponding to a configured modulation technique (e.g., a non-coherent or coherent modulation technique). In some examples, the modulation component 310-a can be configured to use a non-coherent modulation technique, such as DPSK or DAPSK. In other examples, the modulation component 310-a can be configured to use a coherent modulation technique, such as PSK or QAM. The modulation component 310-a can also be configured to provide a set of modulated symbols to the DFT component 315-a. The modulation component 310-a can be based on the description herein and with reference to Figure 2 A determination is made to use one of coherent modulation or non-coherent modulation techniques. In some examples, modulation component 310-a can be configured to provide N modulated symbols to DFT component 315-a. In some cases, the N modulated symbols can be arranged in parallel in time.

[0145] The DFT component 315-a may be configured to generate a set of frequency-domain symbols from the set of modulated symbols received from the modulation component 310-a. The DFT component 315-a may be an N-point DFT and may generate N frequency-domain symbols.

[0146] The subcarrier mapping component 320-a can be configured to map a set of frequency-domain symbols to a set of subcarriers. In some cases, the subcarrier mapping component 320-a can be configured to map the N frequency-domain symbols generated at the DFT component 315-a to the N subcarriers allocated to the transmission. In some examples, the number of subcarriers available for mapping can be based on the number of communication resources (e.g., the number of resource blocks) allocated to the transmission.

[0147] The IDFT component 325-a may be configured to generate a time domain signal from a set of frequency domain signals. The time domain signal may include a modified version of the modulated codeword set provided to the DFT component 315-a and a weighted sum of the modulated codewords. The IDFT component 325-a may be configured to generate a time domain signal based on a carrier bandwidth configured for the transmission. The carrier may include M subcarriers. In some cases, the modified modulated codeword set may be arranged in a serial manner in time. In some examples, the time domain signal is regarded as an SC-FDM codeword. In some examples, the time domain signal may be upsampled as a result of converting the frequency domain codeword set into a time domain signal. The upsampling amount may be based on the number of subcarriers (N) allocated to the transmission and the number of subcarriers (M) included in the carrier including the transmission.

[0148] The signal processing component 330-a may be configured to add a cyclic prefix (CP) to the time domain signal. The signal processing component 330-a may also be configured to apply a pulse shaping (PS) technique to the time domain signal. The pulse shaping process may include upsampling the time domain signal by a factor of four.

[0149] The transmit component 335-a can be configured to convert the time domain signal from a digitized version to an analog version (DAC) of the time domain signal - for example, the transmit component 335-a can interpolate the upsampled and digitized version of the time domain signal. The transmit component 335-a can also be configured to generate an RF signal for transmitting the analog version of the time domain signal. The transmit component 335-a can include a power amplifier used to generate the analog version of the time domain signal. The output of the power amplifier can be coupled to an RF antenna used to wirelessly transmit the time domain signal over a channel.

[0150] In some examples, the modulation component 310-a maps a data set 305-a (e.g., a set of bits, such as "01010001001") to a set of modulation symbols of a configured symbol constellation. In some examples, the modulation component 310-a may configure (or be configured to use) a symbol constellation corresponding to a DPSK modulation technique - for example, based on a configured spectrum band, phase noise, a selected MCS, a received request, etc. The modulation component 310-a may provide N modulation symbols to the DFT component 315-a. In some cases, N is determined based on a resource allocation size for subsequent transmissions (e.g., the number of subcarriers allocated to subsequent transmissions). The DFT component 315-a may convert the N modulation symbols into N frequency domain symbols. The subcarrier mapping component 320-a may map the N frequency domain symbols to the N subcarriers allocated to subsequent transmissions. The IDFT component 325-a can convert the mapped frequency domain symbols into time domain signals (or DPSK SC-FDM symbols) based on the M subcarriers configured for the transmission. The DPSK SC-FDM symbol may include a modified version of the N modulated symbols arranged in series, and the M-N weighted sums of the N modulated symbols interspersed between the N modified modulated symbols. The signal processing component 330-a can add a cyclic prefix to the DPSK SC-FDM symbol. The signal processing component 330-a can also apply pulse shaping to the DPSK SC-FDM symbol. The transmission component 335-a can convert the DPSK SC-FDM symbol from a discretized version to an analog version. The transmission component 335-a can also up-convert the DPSK SC-FDM symbol to a carrier frequency and use a power amplifier to generate an RF signal, which is applied to a transmit antenna coupled to the power amplifier.

[0151] Figure 3B Various aspects of an RF chain for selecting a transmission configuration in accordance with various aspects of the present disclosure are illustrated.

[0152] The receive chain 301-b may be configured to receive a SC-FDMA transmission conveying a data set. The receive chain 301-b may include a demodulation component 345-b, an IDFT component 350-b, a subcarrier demapping component 355-b, a DFT component 360-b, a signal processing component 365-b, and a receiving component 370-b.

[0153] The receiving component 370-b may be configured to convert the time domain signal from an analog version to a digitized version (ADC) of the time domain signal - for example, the receiving component 370-b may sample the time domain signal. The receiving component 370-b may include a mixer used to remove the carrier frequency from the time domain signal. The receiving component 370-b may be coupled to an RF antenna used to wirelessly receive the analog time domain signal over a channel. The time domain signal may include a sum of modulated codeword sets arranged in a serial manner and modulated codeword sets interspersed between the modulated codeword sets.

[0154] The signal processing component 365-b may be configured to remove a cyclic prefix (CP) from the digitized time domain signal.The signal processing component 365-b may be configured to provide the modulated symbol sets and the sum of the modulated symbol sets included in the time domain signal to the DFT component 360-b in parallel.

[0155] The DFT component 360-b may be configured to generate a set of frequency domain symbols from a set of modulated symbols included in the time domain signal and a sum. The DFT component 360-b may be an M-point DFT and may generate M frequency domain symbols corresponding to a set of subcarriers. The set of subcarriers may include M subcarriers that make up a carrier.

[0156] The subcarrier demapping component 355-b may be configured to demap a set of frequency-domain symbols from a set of subcarriers. In some cases, the subcarrier demapping component 355-b may be configured to extract N frequency-domain symbols from the N subcarriers allocated to the transmission. In some examples, the number of subcarriers available for mapping may be based on the number of communication resources (e.g., the number of resource blocks) allocated to the transmission.

[0157] The IDFT component 350-b may be configured to generate a time domain signal from a set of frequency domain signals. The IDFT component 350-b may be configured to generate a time domain signal based on the number of subcarriers allocated to the transmission. The time domain signal may include a set of modulated symbols initially processed by a transmitting device (e.g., at a modulation component 310-a). The IDFT component 350-b may be configured to provide a set of modulated symbols to a demodulation component 345-b in a serial manner.

[0158] The demodulation component 345-b may be configured to map a set of modulated symbols (e.g., 1 or more bits of data) to modulation symbols in a modulation constellation corresponding to a configured modulation technique (e.g., a non-coherent or coherent modulation technique). In some examples, the demodulation component 345-b may be configured to use a non-coherent demodulation technique, such as DPSK or DAPSK. In other examples, the demodulation component 345-b may be configured to use a coherent demodulation technique, such as PSK or QAM. The demodulation component 345-b may also be configured to detect data values ​​associated with the set of modulated symbols based on mapping the set of modulated symbols to the modulation constellation. In some examples, the demodulation component 345-b outputs a data set 340-b (e.g., a set of bits, such as "01010001001").

[0159] Figure 4 A block diagram 400 of a device 405 supporting selection of a transmission configuration according to aspects of the present disclosure is shown. The device 405 may be an example of aspects of a UE 115 as described herein. Alternatively, the device 405 may be an example of aspects of a base station 105 as described herein. The device 405 may include a receiver 410, a communication manager 415, and a transmitter 420. The device 405 may also include one or more processors, a memory coupled to the one or more processors, and instructions stored in the memory, which are executable by the one or more processors to enable the one or more processors to perform the transmission configuration selection features discussed herein. Each of these components may be in communication with each other (e.g., via one or more buses).

[0160] Receiver 410 may receive information, such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to selecting a transmission configuration, etc.). The information may be passed to other components of device 405. Receiver 410 may be a reference Figure 7 Examples of aspects of the described transceiver 720. The receiver 410 may utilize a single antenna or a collection of antennas.

[0161] The communication manager 415 may select a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by a transmitting device to communicate with a receiving device; modulate a data set using DPSK modulation based on the non-coherent modulation configuration to obtain a modulated codeword set; generate a frequency domain codeword set from the modulated codeword set using a discrete Fourier transform; and transmit a time domain waveform obtained from the frequency domain codeword set in a codeword period of the radio frequency spectrum band. The communication manager 415 may be an example of aspects of the communication manager 710 described herein.

[0162] The communication manager 415 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 415 or its subcomponents may be performed by a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described in the present disclosure.

[0163] The communication manager 415 or its subcomponents may be physically located at various locations, including being distributed such that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 415 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 415 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0164] Transmitter 420 may transmit signals generated by other components of device 405. In some examples, transmitter 420 may be co-located with receiver 410 in a transceiver module. For example, transmitter 420 may be a reference Figure 7 Examples of aspects of the described transceiver 720. The transmitter 420 may utilize a single antenna or a collection of antennas.

[0165] Figure 5 A block diagram 500 of a device 505 supporting selection of a transmission configuration according to aspects of the present disclosure is shown. The device 505 may be an example of aspects of the device 405 or UE 115 as described herein. Alternatively, the device 505 may be an example of aspects of the base station 105 as described herein. The device 505 may include a receiver 510, a communication manager 515, and a transmitter 540. The device 505 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses). The receiver 510 may receive information, such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to selecting a transmission configuration, etc.). The information may be passed to other components of the device 505. The receiver 510 may be a reference Figure 7 Examples of aspects of the described transceiver 720. The receiver 510 may utilize a single antenna or a collection of antennas.

[0166] The communication manager 515 may be an example of aspects of the communication manager 415 as described herein. The communication manager 515 may include a transmission configuration component 520, a symbol modulation component 525, a frequency domain component 530, and a transmission component 535. The communication manager 515 may be an example of aspects of the communication manager 710 described herein.

[0167] The transmission configuration component 520 can select a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by the transmitting device to communicate with the receiving device.

[0168] The symbol modulation component 525 can modulate the data set using DPSK modulation based on the non-coherent modulation configuration to obtain a set of modulated symbols.

[0169] Frequency domain component 530 may generate a set of frequency domain symbols from the set of modulated symbols using a discrete Fourier transform.

[0170] The transmission component 535 can transmit the time domain waveform obtained from the frequency domain codeword set in the codeword period of the radio frequency spectrum band.

[0171] Transmitter 540 may transmit signals generated by other components of device 505. In some examples, transmitter 540 may be co-located with receiver 510 in a transceiver module. For example, transmitter 540 may be a reference Figure 7 Examples of aspects of the described transceiver 720. The transmitter 540 may utilize a single antenna or a collection of antennas.

[0172] In some cases, the transmission configuration component 520, the codeword modulation component 525, the frequency domain component 530, and the transmission component 535 can each be a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) or at least a portion thereof. The processor can be coupled to a memory and execute instructions stored in the memory, which enable the processor to perform or facilitate the features of the transmission configuration component 520, the codeword modulation component 525, the frequency domain component 530, and the transmission component 535 as discussed herein. The transceiver processor can be co-located and / or in communication with the transceiver of the device (e.g., directing the operation of the transceiver). The radio processor can be co-located and / or in communication with the radio (e.g., NR radio, LTE radio, Wi-Fi radio) of the device (e.g., directing the operation of the radio). The transmitter processor can be co-located and / or in communication with the transmitter of the device (e.g., directing the operation of the transmitter). The receiver processor can be co-located and / or in communication with the receiver of the device (e.g., directing the operation of the receiver).

[0173] Figure 6A block diagram 600 of a communication manager 605 supporting selection of a transmission configuration in accordance with aspects of the present disclosure is shown. The communication manager 605 may be an example of aspects of the communication manager 415, the communication manager 515, or the communication manager 710 described herein. The communication manager 605 may include a transmission configuration component 610, a symbol modulation component 615, a frequency domain component 620, a transmission component 625, a spectral efficiency component 630, a reference signal component 635, a mapping component 640, a resource identification component 645, a PAPR component 650, a time domain component 655, and a pulse shaping component 660. Each of these modules may be in communication with each other directly or indirectly (e.g., via one or more buses).

[0174] The transmission configuration component 610 can select a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by a transmitting device to communicate with a receiving device.

[0175] In some examples, transmission configuration component 610 may transmit an indication to the receiving device that a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode has been selected based on the non-coherent modulation configuration being selected.

[0176] In some examples, transmission configuration component 610 may receive a request from the recipient device to configure the non-coherent modulation configuration, wherein the non-coherent modulation configuration is selected based on the request.

[0177] In some examples, the transmission configuration component 610 may identify phase noise associated with transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is selected based on the phase noise exceeding a threshold.

[0178] In some examples, the RF spectrum band is identified as comprising a millimeter wave spectrum band, a sub-terahertz spectrum band, or both, wherein the non-coherent modulation configuration is selected based on the data set being scheduled for transmission on the millimeter wave spectrum band or the sub-terahertz spectrum band.

[0179] In some examples, the transmission configuration component 610 may identify a modulation and coding scheme for transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is further selected based on the modulation and coding scheme exceeding a threshold.

[0180] In some examples, transmission configuration component 610 can select a DAPSK constellation based on a spectral efficiency associated with a DPSK constellation set according to which the data set is modulated being below a threshold.

[0181] In some examples, the transmission configuration component 610 may select a single carrier frequency domain multiple access (SC-FDMA) mode from a group of channel access modes based on the radio frequency spectrum band, wherein the set of frequency domain codewords is generated using a discrete Fourier transform based on the SC-FDMA mode being selected.

[0182] In some examples, transmission configuration component 610 may select a MIMO SC-FDMA mode based on a spectral efficiency associated with the SC-FDMA mode being below a threshold, wherein the set of frequency-domain symbols is generated using a discrete Fourier transform based on the MIMO SC-FDMA mode.

[0183] In some examples, the transmission configuration component 610 may select the DPSK constellation based on a PAPR associated with communicating over the radio frequency spectrum band using the SC-FDMA mode and the DPSK constellation, wherein the PAPR associated with the DPSK constellation is based on a relationship between an amount of resources allocated to the transmitting device and a carrier bandwidth, and wherein the data set is modulated according to the DPSK constellation.

[0184] In some examples, determining an entry in a table corresponding to the amount of resources and the carrier bandwidth includes an indication of the DPSK constellation.

[0185] In some examples, the transmission configuration component 610 may select a coherent modulation configuration from the group of modulation configurations based on the RF spectrum band, the modulation and coding scheme, phase noise, or a combination thereof.

[0186] In some examples, the transmission configuration component 610 may select a single carrier frequency domain multiple access (SC-FDMA) mode from a group of channel access modes for communicating on the RF spectrum band based on the RF spectrum band, the modulation and coding scheme, phase noise, or a combination thereof.

[0187] In some examples, the transmission configuration component 610 can increase the order of the PSK modulation based on a PAPR threshold, wherein the PAPR of the second time-domain waveform can be increased based on the order of the PSK modulation to meet the PAPP threshold.

[0188] In some examples, the indication is transmitted in a control channel using a coherent multi-carrier OFDMA mode.

[0189] In some cases, the group of channel access modes includes a single-carrier channel access mode and a multi-carrier channel access mode.

[0190] In some cases, the second data set is scheduled for transmission on a submillimeter wave spectrum band, the modulation and coding scheme used to transmit the second data set on the radio frequency spectrum band is below a first threshold, the phase noise associated with transmitting the second data set on the radio frequency spectrum band is below a second threshold, or a combination thereof.

[0191] In some cases, the group of modulation configurations includes one or more coherent modulation configurations and one or more incoherent modulation configurations.

[0192] In some cases, the DPSK modulation includes differential M-ary phase shift keying modulation or differential amplitude M-ary phase shift keying modulation.

[0193] The symbol modulation component 615 can modulate the data set using DPSK modulation based on the non-coherent modulation configuration to obtain a set of modulated symbols.

[0194] In some examples, the codeword modulation component 615 can modulate the second data set using a phase shift keying (PSK) modulation configuration based on the coherent modulation configuration being selected to obtain a second set of modulated codewords.

[0195] Frequency domain component 620 may generate a set of frequency domain symbols from the set of modulated symbols using a discrete Fourier transform.

[0196] In some examples, frequency domain component 620 can generate a second set of frequency domain symbols from the second set of modulated symbols using a discrete Fourier transform based on the SC-FDMA mode, wherein the second time domain waveform is obtained from the second set of frequency domain symbols.

[0197] The transmission component 625 can transmit the time domain waveform obtained from the frequency domain codeword set in the codeword period of the radio frequency spectrum band.

[0198] In some examples, the transmission component 625 may transmit a second time domain waveform in a second codeword period of the radio frequency spectrum band based on a second set of modulated codewords.

[0199] The spectral efficiency component 630 can be selected to identify, for a DPSK constellation set, a spectral efficiency associated with a communication link between the transmitting device and the receiving device based on the non-coherent modulation configuration being selected.

[0200] In some examples, spectral efficiency component 630 can identify, for the SC-FDMA mode, a spectral efficiency associated with the communication link between the transmitting device and the receiving device.

[0201] The reference signal component 635 can be selected to disable transmission of a phase tracking reference signal based on the non-coherent modulation configuration.

[0202] In some examples, the reference signal component 635 may disable transmission of a demodulation reference signal based on a delay profile associated with communicating over the RF spectrum band using a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode.

[0203] Mapping component 640 can map a portion of the data set to resources allocated for the phase tracking reference signal.

[0204] In some examples, mapping component 640 can map a portion of the data set to resources allocated for the demodulation reference signal, wherein a code rate of the time domain waveform is reduced based on the mapping.

[0205] In some examples, mapping component 640 may map the second set of frequency-domain codewords to a set of subcarriers in the radio frequency spectrum band.

[0206] In some examples, mapping component 640 may map the second set of modulated codewords to a set of subcarriers in the radio frequency spectrum band.

[0207] In some cases, a code rate of the time domain waveform is reduced based on the mapping.

[0208] The resource identification component 645 can identify the amount of resources allocated to the transmitting device and the carrier bandwidth configured for the transmitting device.

[0209] The PAPR component 650 may identify a peak to average power (PAPR) threshold for communicating over the RF spectrum band.

[0210] In some examples, the PAPR component 650 may identify a first PAPR associated with communicating over the radio frequency spectrum band using the SC-FDMA mode and a first DPSK constellation having a first order.

[0211] In some examples, the PAPR component 650 may identify a second PAPR associated with communicating over the radio frequency spectrum band using the SC-FDMA mode and a second DPSK constellation having a second order that is greater than the first order, wherein the data set is modulated according to the second DPSK constellation based on the second PAPR being below the PAPR threshold.

[0212] In some examples, the PAPR component 650 may identify a peak to average power (PAPR) threshold for communicating over the RF spectrum band using the SC-FDMA mode.

[0213] The time domain component 655 may generate a third time domain waveform from the mapped set of second frequency domain symbols using an inverse discrete Fourier transform.

[0214] In some examples, the time domain component 655 may generate a third time domain waveform from the mapped second set of modulated symbols using an inverse discrete Fourier transform.

[0215] The pulse shaping component 660 may upsample the third time-domain waveform to obtain a second time-domain waveform.

[0216] In some cases, the transmission configuration component 610, the symbol modulation component 615, the frequency domain component 620, the transmission component 625, the spectrum efficiency component 630, the reference signal component 635, the mapping component 640, the resource identification component 645, the PAPR component 650, the time domain component 655, and the pulse shaping component 660 can each be a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) or at least a portion thereof. The processor can be coupled to a memory and execute instructions stored in the memory, which enable the processor to perform or facilitate the features of the transmission configuration component 610, the symbol modulation component 615, the frequency domain component 620, the transmission component 625, the spectrum efficiency component 630, the reference signal component 635, the mapping component 640, the resource identification component 645, the PAPR component 650, the time domain component 655, and the pulse shaping component 660 as discussed herein.

[0217] Figure 7 A diagram of a system 700 including a device 705 that supports selecting a transmission configuration according to aspects of the present disclosure is shown. The device 705 may be an example of a device 405, a device 505, or a UE 115 as described herein or include components of these devices. The device 705 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communication manager 710, an I / O controller 715, a transceiver 720, an antenna 725, a memory 730, and a processor 740. These components may be in electronic communication via one or more buses (e.g., a bus 745).

[0218] The communication manager 710 may select a non-coherent modulation configuration from a modulation configuration group based on a radio frequency spectrum band used by a transmitting device to communicate with a receiving device; modulate a data set using DPSK modulation based on the non-coherent modulation configuration to obtain a modulated codeword set; generate a frequency domain codeword set from the modulated codeword set using a discrete Fourier transform; and transmit a time domain waveform obtained from the frequency domain codeword set in a codeword period of the radio frequency spectrum band.

[0219] I / O controller 715 can manage input and output signals of device 705. I / O controller 715 can also manage peripheral devices that are not integrated into device 705. In some cases, I / O controller 715 can represent a physical connection or port to an external peripheral device. In some cases, I / O controller 715 can utilize an operating system, such as Or another known operating system. In other cases, I / O controller 715 may represent or interact with a modem, keyboard, mouse, touch screen, or similar device. In some cases, I / O controller 715 may be implemented as part of a processor. In some cases, a user may interact with device 705 via I / O controller 715 or via hardware components controlled by I / O controller 715.

[0220] The transceiver 720 may communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 720 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 720 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0221] In some cases, a wireless device may include a single antenna 725. However, in some cases, the device may have more than one antenna 725, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0222] The memory 730 may include random access memory (RAM), read-only memory (ROM), or a combination thereof. The memory 730 may store computer-readable, computer-executable code 735 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, the memory 730 may include, among other things, a basic input / output system (BIOS), which may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0223] The processor 740 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, the processor 740 may be configured to operate a memory array using a memory controller. In other cases, the memory controller may be integrated into the processor 740. The processor 740 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 730) to cause the device 705 to perform various functions (e.g., functions or tasks that support selecting a transmission configuration).

[0224] The code 735 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 735 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 735 may not be directly executed by the processor 740, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0225] Figure 8 A block diagram 800 of a device 805 that supports selecting a transmission configuration according to various aspects of the present disclosure is shown. The device 805 can be an example of various aspects of a base station 105 as described herein. Alternatively, the device 805 can be an example of various aspects of a UE 115 as described herein. The device 805 may include a receiver 810, a communication manager 815, and a transmitter 820. The device 805 may also include one or more processors, a memory coupled to the one or more processors, and instructions stored in the memory that can be executed by the one or more processors to enable the one or more processors to perform the transmission configuration selection features discussed herein. Each of these components may be in communication with each other (e.g., via one or more buses). Each of these components may be in communication with each other (e.g., via one or more buses).

[0226] The receiver 810 may receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to selecting a transmission configuration, etc.). The information may be passed to other components of the device 805. The receiver 810 may be a reference Fig.11 Examples of aspects of the described transceiver 1120. The receiver 810 may utilize a single antenna or a collection of antennas.

[0227] The communication manager 815 may select a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by a receiving device to communicate with a transmitting device; receive a time domain waveform in a symbol period of the radio frequency spectrum band; generate a frequency domain symbol set from the time domain waveform using a discrete Fourier transform; demap the frequency domain symbol set from a set of subcarriers in the radio frequency spectrum band; generate a modulated symbol set from the demapped frequency domain symbol set using an inverse discrete Fourier transform; and demodulate the modulated symbol set using DPSK demodulation based on the non-coherent modulation configuration to obtain a data set. The communication manager 815 may be an example of aspects of the communication manager 1110 described herein.

[0228] The communication manager 815 or its subcomponents may be implemented in hardware, in code (e.g., software or firmware) executed by a processor, or any combination thereof. If implemented in code executed by a processor, the functions of the communication manager 815 or its subcomponents may be performed by a general purpose processor, a DSP, an application specific integrated circuit (ASIC), an FPGA or other programmable logic device designed to perform the functions described in the present disclosure, discrete gate or transistor logic, discrete hardware components, or any combination thereof.

[0229] The communication manager 815 or its subcomponents may be physically located at various locations, including being distributed such that portions of functionality are implemented by one or more physical components at different physical locations. In some examples, according to various aspects of the present disclosure, the communication manager 815 or its subcomponents may be separate and distinct components. In some examples, according to various aspects of the present disclosure, the communication manager 815 or its subcomponents may be combined with one or more other hardware components, including but not limited to input / output (I / O) components, a transceiver, a network server, another computing device, one or more other components described in the present disclosure, or a combination thereof.

[0230] The transmitter 820 may transmit signals generated by other components of the device 805. In some examples, the transmitter 820 may be co-located with the receiver 810 in a transceiver module. For example, the transmitter 820 may be a reference Fig.11 Examples of aspects of the described transceiver 1120. The transmitter 820 may utilize a single antenna or a collection of antennas.

[0231] Fig. 9 A block diagram 900 of a device 905 supporting selection of a transmission configuration according to aspects of the present disclosure is shown. The device 905 may be an example of aspects of the device 805 or base station 105 as described herein. Alternatively, the device 905 may be an example of aspects of the UE 115 as described herein. The device 905 may include a receiver 910, a communication manager 915, and a transmitter 950. The device 905 may also include a processor. Each of these components may be in communication with each other (e.g., via one or more buses).

[0232] The receiver 910 may receive information, such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, and information related to selecting a transmission configuration, etc.). The information may be passed to other components of the device 905. The receiver 910 may be a reference Fig.11 Examples of various aspects of the described transceiver 1120. The receiver 910 may utilize a single antenna or a collection of antennas.

[0233] The communication manager 915 may be an example of aspects of the communication manager 815 as described herein. The communication manager 915 may include a receive configuration component 920, a receive component 925, a frequency domain component 930, a demapping component 935, a time domain component 940, and a symbol demodulation component 945. The communication manager 915 may be an example of aspects of the communication manager 1110 described herein.

[0234] The receiving configuration component 920 can select a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by the receiving device to communicate with the transmitting device.

[0235] The receiving component 925 can receive the time domain waveform in the code element period of the radio frequency spectrum band.

[0236] Frequency domain component 930 may generate a set of frequency domain symbols from the time domain waveform using a discrete Fourier transform.

[0237] The demapping component 935 can demap the set of frequency domain codewords from the set of subcarriers in the radio frequency spectrum band.

[0238] The time domain component 940 may generate a set of modulated symbols from the demapped set of frequency domain symbols using an inverse discrete Fourier transform.

[0239] A symbol demodulation component 945 can demodulate the set of modulated symbols using DPSK demodulation based on the non-coherent modulation configuration to obtain a data set.

[0240] The transmitter 950 may transmit signals generated by other components of the device 905. In some examples, the transmitter 950 may be co-located with the receiver 910 in a transceiver module. For example, the transmitter 950 may be a reference Fig.11 Examples of aspects of the described transceiver 1120. The transmitter 950 may utilize a single antenna or a collection of antennas.

[0241] In some cases, the receiving configuration component 920, the receiving component 925, the frequency domain component 930, the demapping component 935, the time domain component 940, and the codeword demodulation component 945 can each be a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) or at least a part thereof. The processor can be coupled to a memory and execute instructions stored in the memory, which enable the processor to perform or facilitate the features of the receiving configuration component 920, the receiving component 925, the frequency domain component 930, the demapping component 935, the time domain component 940, and the codeword demodulation component 945 as discussed herein. The transceiver processor can be co-located and / or communicated with the transceiver of the device (e.g., directing the operation of the transceiver). The radio processor can be co-located and / or communicated with the radio of the device (e.g., NR radio, LTE radio, Wi-Fi radio) (e.g., directing the operation of the radio). The transmitter processor can be co-located and / or communicated with the transmitter of the device (e.g., directing the operation of the transmitter). A receiver processor may be co-located and / or in communication with a receiver of a device (eg, directing the operation of the receiver).

[0242] Fig.10A block diagram 1000 of a communication manager 1005 supporting selection of a transmission configuration in accordance with aspects of the present disclosure is shown. The communication manager 1005 may be an example of aspects of the communication manager 815, the communication manager 915, or the communication manager 1110 described herein. The communication manager 1005 may include a receive configuration component 1010, a receive component 1015, a frequency domain component 1020, a demapping component 1025, a time domain component 1030, a symbol demodulation component 1035, a spectral efficiency component 1040, a transmission configuration component 1045, a reference signal component 1050, a resource identification component 1055, and a PAPR component 1060. Each of these modules may be in direct or indirect communication with each other (e.g., via one or more buses).

[0243] The receiving configuration component 1010 can select a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by the receiving device to communicate with the transmitting device.

[0244] In some examples, reception configuration component 1010 may receive an indication from the recipient device that a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode has been selected to transmit the data set.

[0245] In some examples, the receiving configuration component 1010 may transmit a request to the transmitting device to configure the non-coherent modulation configuration based on selecting the non-coherent modulation configuration.

[0246] In some examples, the receive configuration component 1010 may identify phase noise associated with transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is selected based on the phase noise exceeding a threshold.

[0247] In some examples, the RF spectrum band is identified as comprising a millimeter wave spectrum band, a sub-terahertz spectrum band, or both, wherein the non-coherent modulation configuration is selected based on the data set being scheduled for transmission on the millimeter wave spectrum band or the sub-terahertz spectrum band.

[0248] In some examples, the receive configuration component 1010 may identify a modulation and coding scheme for transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is further selected based on the modulation and coding scheme exceeding a threshold.

[0249] In some examples, the receiving configuration component 1010 may select a single carrier frequency domain multiple access (SC-FDMA) mode from a group of channel access modes based on the radio frequency spectrum band, wherein the set of frequency domain codewords is generated using a discrete Fourier transform based on the SC-FDMA mode being selected.

[0250] In some examples, the receive configuration component 1010 may select a MIMO SC-FDMA mode based on a spectral efficiency associated with the SC-FDMA mode being below a threshold, wherein the set of frequency-domain symbols is generated using a discrete Fourier transform based on the MIMO SC-FDMA mode.

[0251] In some examples, the receive configuration component 1010 may select the DPSK constellation based on a PAPR associated with communicating over the radio frequency spectrum band using the SC-FDMA mode and the DPSK constellation, wherein the PAPR associated with the DPSK constellation is based on a relationship between an amount of resources allocated to the transmitting device and a carrier bandwidth, and wherein the data set is demodulated according to the DPSK constellation.

[0252] In some examples, determining an entry in a table corresponding to the amount of resources and the carrier bandwidth includes an indication of the DPSK constellation.

[0253] In some examples, the indication is received in a control channel using a coherent multi-carrier OFDMA mode.

[0254] In some cases, the group of channel access modes includes a single-carrier channel access mode and a multi-carrier channel access mode.

[0255] The receiving component 1015 can receive a time domain waveform in a code element period of the radio frequency spectrum band.

[0256] In some examples, receiving component 1015 can receive a portion of the data set on resources allocated for a phase tracking reference signal.

[0257] In some examples, receiving component 1015 may receive a portion of the data set on resources allocated for a demodulation reference signal.

[0258] The frequency domain component 1020 can generate a set of frequency domain symbols from the time domain waveform using a discrete Fourier transform.

[0259] The demapping component 1025 can demap the set of frequency domain codewords from the set of subcarriers in the radio frequency spectrum band.

[0260] The time domain component 1030 may generate a set of modulated symbols from the demapped set of frequency domain symbols using an inverse discrete Fourier transform.

[0261] The symbol demodulation component 1035 can demodulate the set of modulated symbols using DPSK demodulation based on the non-coherent modulation configuration to obtain a data set.

[0262] The spectral efficiency component 1040 can be selected to identify, for a DPSK constellation set, a spectral efficiency associated with a communication link between the receiving device and the transmitting device based on the non-coherent modulation configuration being selected.

[0263] In some examples, spectral efficiency component 1040 can identify, for the SC-FDMA mode, a spectral efficiency associated with the communication link between the transmitting device and the receiving device.

[0264] Transmission configuration component 1045 can select a DAPSK constellation based on a spectral efficiency associated with a DPSK constellation set according to which the data set is demodulated being below a threshold.

[0265] The reference signal component 1050 can determine that transmission of the phase tracking reference signal is disabled based on the non-coherent modulation configuration being selected.

[0266] In some examples, the reference signal component 1050 may transmit a request to the transmitting device to disable transmission of a demodulation reference signal based on a delay profile associated with communicating over the radio frequency spectrum band using a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode.

[0267] The resource identification component 1055 can identify the amount of resources allocated to the recipient device and the carrier bandwidth configured for the recipient device.

[0268] The PAPR component 1060 can identify a peak to average power (PAPR) threshold for communicating over the RF spectrum band.

[0269] In some examples, PAPR component 1060 may identify a first PAPR associated with communicating over the radio frequency spectrum band using the SC-FDMA mode and a first DPSK constellation having a first order.

[0270] In some examples, the PAPR component 1060 may identify a second PAPR associated with communicating over the radio frequency spectrum band using the SC-FDMA mode and a second DPSK constellation having a second order that is greater than the first order, wherein the data set is modulated according to the second DPSK constellation based on the second PAPR being below the PAPR threshold.

[0271] In some cases, the receive configuration component 1010, the receive component 1015, the frequency domain component 1020, the demapping component 1025, the time domain component 1030, the codeword demodulation component 1035, the spectrum efficiency component 1040, the transmission configuration component 1045, the reference signal component 1050, the resource identification component 1055 and the PAPR component 1060 can each be a processor (e.g., a transceiver processor, or a radio processor, or a transmitter processor, or a receiver processor) or at least a part thereof. The processor can be coupled to a memory and execute instructions stored in the memory, which enable the processor to perform or cause the features of the receive configuration component 1010, the receive component 1015, the frequency domain component 1020, the demapping component 1025, the time domain component 1030, the codeword demodulation component 1035, the spectrum efficiency component 1040, the transmission configuration component 1045, the reference signal component 1050, the resource identification component 1055 and the PAPR component 1060 as discussed herein.

[0272] Fig.11 A diagram of a system 1100 including a device 1105 that supports selecting a transmission configuration according to aspects of the present disclosure is shown. The device 1105 may be an example of a device 805, a device 905, or a base station 105 as described herein or include components of the above devices. The device 1105 may include components for two-way voice and data communications, including components for transmitting and receiving communications, including a communication manager 1110, a network communication manager 1115, a transceiver 1120, an antenna 1125, a memory 1130, a processor 1140, and an inter-station communication manager 1145. These components may be in electronic communication via one or more buses (e.g., bus 1150).

[0273] The communication manager 1110 may select a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by a receiving device to communicate with a transmitting device; receive a time domain waveform in a symbol period of the radio frequency spectrum band; generate a frequency domain symbol set from the time domain waveform using a discrete Fourier transform; demap the frequency domain symbol set from a set of subcarriers in the radio frequency spectrum band; generate a modulated symbol set from the demapped frequency domain symbol set using an inverse discrete Fourier transform; and demodulate the modulated symbol set using DPSK demodulation based on the non-coherent modulation configuration to obtain a data set.

[0274] The network communications manager 1115 may manage communications with the core network (eg, via one or more wired backhaul links). For example, the network communications manager 1115 may manage the delivery of data communications for client devices, such as one or more UEs 115.

[0275] The transceiver 1120 may communicate bidirectionally via one or more antennas, wired or wireless links, as described above. For example, the transceiver 1120 may represent a wireless transceiver and may communicate bidirectionally with another wireless transceiver. The transceiver 1120 may also include a modem to modulate packets and provide the modulated packets to an antenna for transmission, and demodulate packets received from an antenna.

[0276] In some cases, a wireless device may include a single antenna 1125. However, in some cases, the device may have more than one antenna 1125, which may be capable of transmitting or receiving multiple wireless transmissions concurrently.

[0277] The memory 1130 may include RAM, ROM, or a combination thereof. The memory 1130 may store computer readable code 1135 including instructions that, when executed by a processor (e.g., processor 1140), cause the device to perform various functions described herein. In some cases, the memory 1130 may include, among other things, a BIOS that may control basic hardware or software operations, such as interaction with peripheral components or devices.

[0278] Processor 1140 may include an intelligent hardware device (e.g., a general purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof). In some cases, processor 1140 may be configured to operate a memory array using a memory controller. In some cases, the memory controller may be integrated into processor 1140. Processor 1140 may be configured to execute computer-readable instructions stored in a memory (e.g., memory 1130) to cause device 1105 to perform various functions (e.g., functions or tasks that support selecting a transmission configuration).

[0279] The inter-site communication manager 1145 may manage communications with other base stations 105 and may include a controller or scheduler for controlling communications with UE 115 in cooperation with other base stations 105. For example, the inter-site communication manager 1145 may coordinate the scheduling of transmissions to UE 115 for various interference mitigation techniques, such as beamforming or joint transmission. In some examples, the inter-site communication manager 1145 may provide an X2 interface within an LTE / LTE-A wireless communication network technology to provide communications between base stations 105.

[0280] The code 1135 may include instructions for implementing various aspects of the present disclosure, including instructions for supporting wireless communications. The code 1135 may be stored in a non-transitory computer-readable medium, such as a system memory or other type of memory. In some cases, the code 1135 may not be directly executed by the processor 1140, but may cause a computer (e.g., when compiled and executed) to perform the functions described herein.

[0281] Fig.12 1 is a flow chart illustrating a method 1200 for supporting selection of a transmission configuration according to aspects of the present disclosure. The operations of the method 1200 may be implemented by a UE 115 or a component thereof as described herein. For example, the operations of the method 1200 may be implemented by a UE 115 or a component thereof as described herein. Figures 4 to 7 In some examples, the UE may execute an instruction set to control the functional elements of the UE to perform the functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the functions described below.

[0282] At 1205, the UE may select a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by a transmitting device to communicate with a receiving device. The operations of 1205 may be performed according to the methods described herein. In some examples, aspects of the operations of 1205 may be performed as described with reference to Figures 4 to 7 The described transport configuration component is executed.

[0283] At 1210, the UE may modulate the data set using DPSK modulation based on the non-coherent modulation configuration to obtain a modulated codeword set. The operations of 1210 may be performed according to the methods described herein. In some examples, aspects of the operations of 1210 may be as described with reference to Figures 4 to 7 The described codeword modulation component is performed.

[0284] At 1215, the UE may generate a frequency domain symbol set from the modulated symbol set using a discrete Fourier transform. The operations of 1215 may be performed according to the methods described herein. In some examples, aspects of the operations of 1215 may be performed as described with reference to Figures 4 to 7 The described frequency domain components are performed.

[0285] At 1220, the UE may transmit a time domain waveform obtained from the frequency domain symbol set in a symbol period of the radio frequency spectrum band. The operation of 1220 may be performed according to the methods described herein. In some examples, various aspects of the operation of 1220 may be performed as described with reference to Figures 4 to 7 The described transmission components are performed.

[0286] Fig.131 is a flow chart illustrating a method 1300 for supporting selection of a transmission configuration according to aspects of the present disclosure. The operations of the method 1300 may be implemented by a base station 105 or components thereof as described herein. For example, the operations of the method 1300 may be implemented by a base station 105 or components thereof as described herein. Figures 8 to 11 In some examples, the base station may execute an instruction set to control the functional elements of the base station to perform the functions described below. Additionally or alternatively, the base station may use dedicated hardware to perform various aspects of the functions described below.

[0287] At 1305, the base station may select a non-coherent modulation configuration from a group of modulation configurations based on a radio frequency spectrum band used by a receiving device to communicate with a transmitting device. The operations of 1305 may be performed according to the methods described herein. In some examples, aspects of the operations of 1305 may be performed as described with reference to Figures 8 to 11 The described receiving configuration component is executed.

[0288] At 1310, the base station may receive a time domain waveform in a symbol period of the radio frequency spectrum band. The operations of 1310 may be performed according to the methods described herein. In some examples, various aspects of the operations of 1310 may be performed as described with reference to Figures 8 to 11 The receiving component described is executed.

[0289] At 1315, the base station may generate a set of frequency domain symbols from the time domain waveform using a discrete Fourier transform. The operations of 1315 may be performed according to the methods described herein. In some examples, aspects of the operations of 1315 may be performed as described with reference to Figures 8 to 11 The described frequency domain components are performed.

[0290] At 1320, the base station may demap the set of frequency domain symbols from the set of subcarriers in the radio frequency spectrum band. The operations of 1320 may be performed according to the methods described herein. In some examples, aspects of the operations of 1320 may be performed as described with reference to Figures 8 to 11 The demapping component described is used to perform the operation.

[0291] At 1325, the base station may generate a set of modulated symbols from the demapped frequency domain symbol set using an inverse discrete Fourier transform. The operations of 1325 may be performed according to the methods described herein. In some examples, aspects of the operations of 1325 may be performed as described with reference to Figures 8 to 11 The described time domain components are implemented.

[0292] At 1330, the base station may demodulate the modulated symbol set using DPSK demodulation based on the non-coherent modulation configuration to obtain a data set. The operations of 1330 may be performed according to the methods described herein. In some examples, aspects of the operations of 1330 may be as described with reference to Figures 8 to 11 The described codeword demodulation component is performed.

[0293] It should be noted that the methods described herein describe possible implementations, and that the various operations and steps may be rearranged or otherwise modified and other implementations are possible. Furthermore, aspects from two or more methods may be combined.

[0294] The following provides an overview of various aspects of the disclosure:

[0295] Aspect 1: A method for wireless communication at a transmitting device, comprising: selecting a non-coherent modulation configuration from a modulation configuration group based at least in part on a radio frequency spectrum band used by the transmitting device to communicate with a receiving device; modulating a data set using differential phase shift keying (DPSK) modulation to obtain a modulated codeword set based at least in part on the non-coherent modulation configuration; generating a frequency domain codeword set from the modulated codeword set using a discrete Fourier transform; and transmitting a time domain waveform obtained from the frequency domain codeword set in a codeword period of the radio frequency spectrum band.

[0296] Aspect 2: The method of aspect 1 further comprises: transmitting an indication to the receiving device that a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode has been selected based at least in part on the non-coherent modulation configuration being selected.

[0297] Aspect 3: The method of aspect 2, wherein the indication is transmitted in a control channel using a coherent multi-carrier orthogonal frequency domain multiple access (OFDMA) mode.

[0298] Aspect 4: The method of any one of aspects 1 to 3, further comprising: receiving a request from the receiving device to configure the non-coherent modulation configuration, wherein the non-coherent modulation configuration is selected based at least in part on the request.

[0299] Aspect 5: The method of any one of Aspects 1 to 4, further comprising: identifying phase noise associated with transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is selected at least in part based on the phase noise exceeding a threshold.

[0300] Aspect 6: The method of any one of Aspects 1 to 5 further includes: identifying that the radio frequency spectrum band includes a millimeter wave spectrum band, a sub-terahertz spectrum band, or both, wherein the non-coherent modulation configuration is selected at least in part based on the data set being scheduled for transmission on the millimeter wave spectrum band or the sub-terahertz spectrum band.

[0301] Aspect 7: The method of Aspect 6 further comprises: identifying a modulation and coding scheme used to transmit the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is further selected at least in part based on the modulation and coding scheme exceeding a threshold.

[0302] Aspect 8: A method as in any one of Aspects 1 to 7, further comprising: selecting a spectral efficiency associated with a communication link between the transmitting device and the receiving device for multiple DPSK constellations based at least in part on the non-coherent modulation configuration; and selecting a differential amplitude phase shift keying (DAPSK) constellation based at least in part on the spectral efficiency associated with the multiple DPSK constellations being below a threshold, wherein the data set is modulated according to the DAPSK constellation.

[0303] Aspect 9: A method as in any one of Aspects 1 to 8, further comprising: disabling transmission of a phase tracking reference signal based at least in part on the non-coherent modulation configuration being selected; and mapping a portion of the data set to resources allocated for the phase tracking reference signal.

[0304] Aspect 10: The method of aspect 9, wherein a code rate of the time domain waveform is reduced based at least in part on the mapping.

[0305] Aspect 11: A method as in any one of Aspects 1 to 10, further comprising: selecting a single carrier frequency domain multiple access (SC-FDMA) mode from a group of channel access modes based at least in part on the radio frequency spectrum band, wherein the frequency domain codeword set is generated using a discrete Fourier transform based at least in part on the selection of the SC-FDMA mode.

[0306] Aspect 12: The method of Aspect 11 further includes: identifying a spectral efficiency associated with the communication link between the transmitting device and the receiving device for the SC-FDMA mode; and selecting a multiple-input multiple-output (MIMO) SC-FDMA mode based at least in part on the spectral efficiency associated with the SC-FDMA mode being lower than a threshold, wherein the frequency domain codeword set is generated using a discrete Fourier transform based at least in part on the MIMO SC-FDMA mode.

[0307] Aspect 13: A method as in any one of Aspects 11 to 12, further comprising: identifying an amount of resources allocated to the transmitting device and a carrier bandwidth configured for the transmitting device; and selecting the DPSK constellation based at least in part on a PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and the DPSK constellation, wherein the PAPR associated with the DPSK constellation is based at least in part on a relationship between the amount of resources allocated to the transmitting device and the carrier bandwidth, and wherein the data set is modulated according to the DPSK constellation.

[0308] Aspect 14: The method of aspect 13, wherein selecting the DPSK constellation comprises: determining that an entry in a table corresponding to the amount of resources and the carrier bandwidth comprises an indication of the DPSK constellation.

[0309] Aspect 15: A method as in any one of Aspects 11 to 14, further comprising: identifying a peak-to-average power (PAPR) threshold for communicating on the radio frequency spectrum band; identifying a first PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and a first DPSK constellation having a first order; and identifying a second PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and a second DPSK constellation having a second order, the second order being greater than the first order, wherein the data set is modulated according to the second DPSK constellation based at least in part on the second PAPR being lower than the PAPR threshold.

[0310] Aspect 16: The method of any one of Aspects 11 to 15, wherein the channel access mode group includes a single-carrier channel access mode and a multi-carrier channel access mode.

[0311] Aspect 17: A method as in any of Aspects 1 to 16, further comprising: disabling transmission of a demodulation reference signal based at least in part on a delay profile associated with communicating on the radio frequency spectrum band using a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode; and mapping a portion of the data set to resources allocated for the demodulation reference signal, wherein a code rate of the time domain waveform is reduced based at least in part on the mapping.

[0312] Aspect 18: The method of any one of Aspects 1 to 17 further includes: selecting a coherent modulation configuration from the modulation configuration group based at least in part on the radio frequency spectrum band, the modulation and coding scheme, the phase noise, or a combination thereof; modulating a second data set using a phase shift keying (PSK) modulation configuration to obtain a second modulated codeword set based at least in part on the selection of the coherent modulation configuration; and transmitting a second time domain waveform in a second codeword period of the radio frequency spectrum band based at least in part on the second modulated codeword set.

[0313] Aspect 19: A method as in Aspect 18, wherein the coherent modulation configuration is selected based at least in part on: the second data set is scheduled for transmission on a submillimeter wave spectrum band, the modulation and coding scheme used to transmit the second data set on the radio frequency spectrum band is lower than a first threshold, the phase noise associated with transmitting the second data set on the radio frequency spectrum band is lower than a second threshold, or a combination thereof.

[0314] Aspect 20: A method as in any one of Aspects 18 to 19, further comprising: selecting a single carrier frequency domain multiple access (SC-FDMA) mode from a group of channel access modes for communicating on the radio frequency spectrum band based at least in part on the radio frequency spectrum band, the modulation and coding scheme, the phase noise, or a combination thereof; and generating a second frequency domain code symbol set from a second modulated code symbol set using a discrete Fourier transform based at least in part on the SC-FDMA mode, wherein the second time domain waveform is obtained from the second frequency domain code symbol set.

[0315] Aspect 21: The method of Aspect 20 further includes: identifying a peak to average power (PAPR) threshold for communicating on the radio frequency spectrum band using the SC-FDMA mode; and increasing the order of the PSK modulation based at least in part on the PAPR threshold, wherein the PAPR of the second time domain waveform is increased at least in part based on the order of the PSK modulation to satisfy the PAPR threshold.

[0316] Aspect 22: A method as in any one of Aspects 20 to 21, further comprising: mapping a second set of frequency domain codewords to a set of subcarriers in the radio frequency spectrum band; generating a third time domain waveform from the mapped second set of frequency domain codewords using an inverse discrete Fourier transform; and upsampling the third time domain waveform to obtain a second time domain waveform.

[0317] Aspect 23: A method as in any one of Aspects 18 to 22, further comprising: mapping a second set of modulated code symbols to a set of subcarriers in the radio frequency spectrum band; generating a third time domain waveform from the mapped second set of modulated code symbols using an inverse discrete Fourier transform; and upsampling the third time domain waveform to obtain a second time domain waveform.

[0318] Aspect 24: The method of any one of aspects 1 to 23, wherein the group of modulation configurations comprises one or more coherent modulation configurations and one or more incoherent modulation configurations.

[0319] Aspect 25: The method of any one of aspects 1 to 24, wherein the DPSK modulation comprises differential M-ary phase shift keying modulation or differential amplitude M-ary phase shift keying (DAPSK) modulation.

[0320] Aspect 26: A method for wireless communication at a receiving device, comprising: selecting a non-coherent modulation configuration from a group of modulation configurations based at least in part on a radio frequency spectrum band used by the receiving device to communicate with a transmitting device; receiving a time domain waveform in a codeword period of the radio frequency spectrum band; generating a frequency domain codeword set from the time domain waveform using a discrete Fourier transform; demapping the frequency domain codeword set from a set of subcarriers in the radio frequency spectrum band; generating a modulated codeword set from the demapped frequency domain codeword set using an inverse discrete Fourier transform; and demodulating the modulated codeword set using differential phase shift keying (DPSK) demodulation based at least in part on the non-coherent modulation configuration to obtain a data set.

[0321] Aspect 27: The method of aspect 26, further comprising: receiving an indication from the receiving device that a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode has been selected to transmit the data set.

[0322] Aspect 28: The method of aspect 27, wherein the indication is received in a control channel using a coherent multi-carrier orthogonal frequency domain multiple access (OFDMA) mode.

[0323] Aspect 29: The method of any one of aspects 26 to 28, further comprising: transmitting a request to the transmitting device to configure the non-coherent modulation configuration based at least in part on selecting the non-coherent modulation configuration.

[0324] Aspect 30: The method of any one of Aspects 26 to 29, further comprising: identifying phase noise associated with transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is selected at least in part based on the phase noise exceeding a threshold.

[0325] Aspect 31: A method as in any one of Aspects 26 to 30, further comprising: identifying that the radio frequency spectrum band includes a millimeter wave spectrum band, a sub-terahertz spectrum band, or both, wherein the non-coherent modulation configuration is selected at least in part based on the data set being scheduled for transmission on the millimeter wave spectrum band or the sub-terahertz spectrum band.

[0326] Aspect 32: The method of Aspect 31 further comprises: identifying a modulation and coding scheme used to transmit the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is further selected at least in part based on the modulation and coding scheme exceeding a threshold.

[0327] Aspect 33: A method as in any one of Aspects 26 to 32, further comprising: selecting a spectral efficiency associated with a communication link between the receiving device and the transmitting device for multiple DPSK constellations based at least in part on the non-coherent modulation configuration; and selecting a differential amplitude phase shift keying (DAPSK) constellation based at least in part on the spectral efficiency associated with the multiple DPSK constellations being below a threshold, wherein the data set is demodulated according to the DAPSK constellation.

[0328] Aspect 34: A method as in any one of Aspects 26 to 33, further comprising: determining that transmission of a phase tracking reference signal is disabled based at least in part on the selection of the non-coherent modulation configuration; and receiving a portion of the data set on resources allocated for the phase tracking reference signal.

[0329] Aspect 35: A method as in any one of Aspects 26 to 34, further comprising: selecting a single carrier frequency domain multiple access (SC-FDMA) mode from a group of channel access modes based at least in part on the radio frequency spectrum band, wherein the set of frequency domain codewords is generated using a discrete Fourier transform based at least in part on the selection of the SC-FDMA mode.

[0330] Aspect 36: The method of Aspect 35 further includes: identifying a spectral efficiency associated with the communication link between the transmitting device and the receiving device for the SC-FDMA mode; and selecting a multiple-input multiple-output (MIMO) SC-FDMA mode based at least in part on the spectral efficiency associated with the SC-FDMA mode being lower than a threshold, wherein the frequency domain codeword set is generated using a discrete Fourier transform based at least in part on the MIMO SC-FDMA mode.

[0331] Aspect 37: A method as in any one of Aspects 35 to 36, further comprising: identifying an amount of resources allocated to the receiving device and a carrier bandwidth configured for the receiving device; and selecting the DPSK constellation based at least in part on a PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and the DPSK constellation, wherein the PAPR associated with the DPSK constellation is based at least in part on a relationship between the amount of resources allocated to the transmitting device and the carrier bandwidth, and wherein the data set is demodulated according to the DPSK constellation.

[0332] Aspect 38: The method of Aspect 37, wherein selecting the DPSK constellation comprises: determining that an entry in a table corresponding to the amount of resources and the carrier bandwidth comprises an indication of the DPSK constellation.

[0333] Aspect 39: The method of any one of Aspects 35 to 38, wherein the channel access mode group includes a single carrier channel access mode and a multi-carrier channel access mode.

[0334] Aspect 40: A method as in any one of Aspects 26 to 39, further comprising: identifying a peak-to-average power (PAPR) threshold for communicating on the radio frequency spectrum band; identifying a first PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and a first DPSK constellation having a first order; and identifying a second PAPR associated with communicating on the radio frequency spectrum band using the SC-FDMA mode and a second DPSK constellation having a second order, the second order being greater than the first order, wherein the data set is modulated according to the second DPSK constellation based at least in part on the second PAPR being lower than the PAPR threshold.

[0335] Aspect 41: A method as in any one of Aspects 26 to 40, further comprising: transmitting a request to the transmitting device to disable transmission of a demodulation reference signal based at least in part on a delay profile associated with communicating on the radio frequency spectrum band using a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode; and receiving a portion of the data set on resources allocated for the demodulation reference signal.

[0336] Aspect 42: An apparatus for wireless communication at a transmitting device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as described in any one of Aspects 1 to 25.

[0337] Aspect 43: An apparatus for wireless communication at a transmitting device, comprising at least one means for performing the method of any one of Aspects 1 to 25.

[0338] Aspect 44: A non-transitory computer-readable medium storing code for wireless communication at a transmitting device, the code comprising instructions executable by a processor to perform the method of any one of aspects 1 to 25.

[0339] Aspect 45: An apparatus for wireless communication at a receiving device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform a method as in any one of Aspects 26 to 41.

[0340] Aspect 46: An apparatus for wireless communication at a recipient device, comprising at least one means for performing the method of any one of Aspects 26 to 41.

[0341] Aspect 47: A non-transitory computer-readable medium storing code for wireless communication at a recipient device, the code comprising instructions executable by a processor to perform the method of any one of aspects 26 to 41.

[0342] Although aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for example purposes, and LTE, LTE-A, LTE-A Pro, or NR terminology may be used in much of the description, the techniques described herein may also be applicable to networks other than LTE, LTE-A, LTE-A Pro, or NR networks. For example, the described techniques may be applied to various other wireless communication systems, such as Ultra Mobile Broadband (UMB), Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM, and other systems and radio technologies not explicitly mentioned herein.

[0343] The information and signals described herein may be represented using any of a variety of different techniques and technologies. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referred to throughout this description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0344] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or performed with a general purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration).

[0345] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted by a computer-readable medium as one or more instructions or codes. Other examples and implementations fall within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination thereof. Features that implement the functions may also be physically located in various locations, including being distributed so that parts of the functions are implemented at different physical locations.

[0346] Computer-readable medium includes both non-transient computer storage medium and communication medium, and it includes any medium that facilitates computer program to transfer from one place to another place.Non-transient storage medium can be any available medium that can be accessed by general or special-purpose computer.As an example and not limitation, non-transient computer-readable medium can include RAM, ROM, electrically erasable programmable ROM (EEPROM), flash memory, compact disk (CD) ROM or other optical disk storage, disk storage or other magnetic storage device, or can be used to carry or store instruction or data structure form of desired program code means and can be accessed by general or special-purpose computer or general or special-purpose processor any other non-transient medium.Similarly, any connection is also properly referred to as computer-readable medium.For example, if software is transmitted from website, server or other remote source using coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then this coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are just included in the definition of computer-readable medium. Disk and disc as used herein include CDs, laser discs, optical discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs, where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

[0347] As used herein (including in the claims), "or" used in a list of items (e.g., a list of items with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, so that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Similarly, as used herein, the phrase "based on" should not be interpreted as referring to a closed set of conditions. For example, an example step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same manner as the phrase "based at least in part on."

[0348] In the accompanying drawings, similar components or features may have the same reference number. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second reference number that distinguishes between similar components. If only the first reference number is used in the specification, the description may apply to any of the similar components having the same first reference number regardless of the second reference number, or other subsequent reference numbers.

[0349] The descriptions set forth herein in conjunction with the accompanying drawings describe example configurations and do not represent all examples that can be implemented or fall within the scope of the claims. The term "example" as used herein means "used as an example, instance, or illustration" and does not mean "better than" or "better than other examples." This detailed description includes specific details to provide an understanding of the described techniques. However, these techniques may be practiced without these specific details. In some instances, known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0350] The description herein is provided to enable one of ordinary skill in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to one of ordinary skill in the art, and the universal principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for wireless communication at a transmitting device, comprising: Selecting a non-coherent modulation configuration from a group of modulation configurations based at least in part on a radio frequency spectrum band used by the transmitting device to communicate with a receiving device; modulating a data set using differential phase shift keying (DPSK) modulation based at least in part on the non-coherent modulation configuration to obtain a set of modulated symbols; generating a set of frequency domain symbols from the set of modulated symbols using a discrete Fourier transform; transmitting an indication to the recipient device that a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode has been selected for transmitting the data set; as well as A time domain waveform obtained from the frequency domain codeword set is transmitted in a codeword period of the radio frequency spectrum band.

2. The method of claim 1, wherein the indication is transmitted in a control channel using a coherent multi-carrier orthogonal frequency domain multiple access (OFDMA) mode.

3. The method of claim 1, further comprising: A request is received from the recipient device to configure the non-coherent modulation configuration, wherein the non-coherent modulation configuration is selected based at least in part on the request.

4. The method of claim 1, further comprising: Identifying phase noise associated with transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is selected based at least in part on the phase noise exceeding a threshold.

5. The method of claim 1, further comprising: Identifying that the radio frequency spectrum band includes a millimeter wave spectrum band, a sub-terahertz spectrum band, or both, wherein the non-coherent modulation configuration is selected at least in part based on the data set being scheduled for transmission on the millimeter wave spectrum band or the sub-terahertz spectrum band.

6. The method of claim 5, further comprising: Identifying a modulation and coding scheme for transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is further selected at least in part based on the modulation and coding scheme exceeding a threshold.

7. The method of claim 1, further comprising: identifying, based at least in part on the non-coherent modulation configuration being selected to identify, for a plurality of DPSK constellations, a spectral efficiency associated with a communication link between the transmitting device and the receiving device; and A differential amplitude phase shift keying (DAPSK) constellation is selected based at least in part on the spectral efficiency associated with the plurality of DPSK constellations being below a threshold, wherein the data set is modulated according to the DAPSK constellation.

8. The method of claim 1, further comprising: disabling transmission of a phase tracking reference signal based at least in part on the non-coherent modulation configuration being selected; as well as A portion of the data set is mapped to resources allocated for the phase tracking reference signal, wherein a code rate of the time domain waveform is reduced based at least in part on the mapping.

9. The method of claim 1, further comprising: The SC-FDMA mode is selected from a group of channel access modes based at least in part on the radio frequency spectrum band, wherein the set of frequency domain codewords is generated using the discrete Fourier transform based at least in part on the SC-FDMA mode being selected.

10. The method of claim 9, further comprising: identifying, for the SC-FDMA mode, a spectral efficiency associated with a communication link between the transmitting device and the receiving device; as well as A multiple-input multiple-output (MIMO) SC-FDMA mode is selected based at least in part on the spectral efficiency associated with the SC-FDMA mode being below a threshold, wherein the set of frequency-domain symbols is generated using the discrete Fourier transform based at least in part on the MIMO SC-FDMA mode.

11. The method of claim 9, further comprising: identifying an amount of resources allocated to the transmitting device and a carrier bandwidth configured for the transmitting device; as well as The DPSK constellation is selected based at least in part on a PAPR associated with communicating over the radio frequency spectrum band using the SC-FDMA mode and the DPSK constellation, wherein the PAPR associated with the DPSK constellation is based at least in part on a relationship between the amount of resources allocated to the transmitting device and the carrier bandwidth, and wherein the data set is modulated according to the DPSK constellation.

12. The method of claim 9, further comprising: Identifying a peak-to-average power (PAPR) threshold for communicating on the radio frequency spectrum band; Identifying a first PAPR associated with communicating over the radio frequency spectrum band using the SC-FDMA mode and a first DPSK constellation having a first order; as well as Identify a second PAPR associated with communicating over the radio frequency spectrum band using the SC-FDMA mode and a second DPSK constellation having a second order that is greater than the first order, wherein the data set is modulated according to the second DPSK constellation based at least in part on the second PAPR being lower than the PAPR threshold.

13. The method of claim 1, further comprising: disabling transmission of a demodulation reference signal based at least in part on a delay profile associated with communicating over the radio frequency spectrum band using the non-coherent SC-FDMA mode; as well as A portion of the data set is mapped to resources allocated for the demodulation reference signal, wherein a code rate of the time domain waveform is reduced based at least in part on the mapping.

14. The method of claim 1, further comprising: selecting a coherent modulation configuration from the group of modulation configurations based at least in part on the radio frequency spectrum band, the modulation and coding scheme, the phase noise, or a combination thereof; modulating a second data set using a phase shift keying (PSK) modulation configuration to obtain a second set of modulated symbols based at least in part on the coherent modulation configuration being selected; as well as A second time domain waveform is transmitted in a second codeword period of the radio frequency spectrum band based at least in part on the second modulated codeword set.

15. The method of claim 14, wherein the coherent modulation configuration is selected based at least in part on: The second data set is scheduled for transmission in a sub-millimeter wave spectrum band, said modulation and coding scheme used to transmit said second data set over said radio frequency spectrum band is below a first threshold, the phase noise associated with transmitting the second data set over the radio frequency spectrum band is below a second threshold, or Its combination.

16. The method of claim 14, further comprising: Selecting the SC-FDMA mode from a group of channel access modes for communicating over the radio frequency spectrum band based at least in part on the radio frequency spectrum band, the modulation and coding scheme, the phase noise, or a combination thereof; generating a second set of frequency-domain symbols from the second set of modulated symbols using the discrete Fourier transform based at least in part on the SC-FDMA mode, wherein the second time-domain waveform is obtained from the second set of frequency-domain symbols; Identify a peak-to-average power (PAPR) threshold for communicating on the radio frequency spectrum band using the SC-FDMA mode; as well as The order of the PSK modulation is increased based at least in part on the PAPR threshold, wherein the PAPR of the second time-domain waveform satisfies the PAPR threshold based at least in part on the order of the PSK modulation being increased.

17. The method of claim 14, further comprising: Mapping the second set of modulated symbols to a set of subcarriers in the radio frequency spectrum band; generating a third time-domain waveform from the mapped set of second modulated symbols using an inverse discrete Fourier transform; as well as The third time domain waveform is up-sampled to obtain the second time domain waveform.

18. A method for wireless communication at a receiving device, comprising: selecting a non-coherent modulation configuration from a group of modulation configurations based at least in part on a radio frequency spectrum band used by the receiving device to communicate with the transmitting device; receiving an indication from the transmitting device that a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode has been selected for transmitting the data set; Receiving a time domain waveform in a symbol period of the radio frequency spectrum band; generating a set of frequency domain symbols from the time domain waveform using a discrete Fourier transform; Demapping the set of frequency domain symbols from a set of subcarriers in the radio frequency spectrum band; generating a set of modulated symbols from the demapped set of frequency-domain symbols using an inverse discrete Fourier transform; as well as The set of modulated symbols is demodulated using differential phase shift keying (DPSK) demodulation based at least in part on the non-coherent modulation configuration to obtain the set of data.

19. The method of claim 18, further comprising: A request is transmitted to the transmitting device to configure the non-coherent modulation configuration based at least in part on selecting the non-coherent modulation configuration.

20. The method of claim 18, further comprising: Identifying phase noise associated with transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is selected based at least in part on the phase noise exceeding a threshold.

21. The method of claim 18, further comprising: identifying, based at least in part on the non-coherent modulation configuration being selected to identify, for a plurality of DPSK constellations, a spectral efficiency associated with a communication link between the receiving device and the transmitting device; and A differential amplitude phase shift keying (DAPSK) constellation is selected based at least in part on the spectral efficiency associated with the plurality of DPSK constellations being below a threshold, wherein the data set is demodulated according to the DAPSK constellation.

22. The method of claim 18, further comprising: transmitting, to the transmitting device, a request to disable transmission of a demodulation reference signal based at least in part on a delay profile associated with communicating over the radio frequency spectrum band using the non-coherent SC-FDMA mode; as well as A portion of the data set is received on resources allocated for the demodulation reference signal.

23. An apparatus for wireless communication at a transmitting device, comprising: processor; a memory coupled to the processor; as well as instructions stored in the memory, the instructions being executable by the processor to cause the apparatus to: Selecting a non-coherent modulation configuration from a group of modulation configurations based at least in part on a radio frequency spectrum band used by the transmitting device to communicate with a receiving device; modulating a data set using differential phase shift keying (DPSK) modulation based at least in part on the non-coherent modulation configuration to obtain a set of modulated symbols; generating a set of frequency domain symbols from the set of modulated symbols using a discrete Fourier transform; transmitting an indication to the recipient device that a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode has been selected for transmitting the data set; as well as A time domain waveform obtained from the frequency domain codeword set is transmitted in a codeword period of the radio frequency spectrum band.

24. The apparatus of claim 23, wherein the instructions are further executable by the processor to cause the apparatus to: A request is received from the recipient device to configure the non-coherent modulation configuration, wherein the non-coherent modulation configuration is selected based at least in part on the request.

25. The apparatus of claim 23, wherein the instructions are further executable by the processor to: Identifying phase noise associated with transmitting the data set over the radio frequency spectrum band, wherein the non-coherent modulation configuration is selected based at least in part on the phase noise exceeding a threshold.

26. An apparatus for wireless communication at a receiving device, comprising: processor; a memory coupled to the processor; as well as instructions stored in the memory, the instructions being executable by the processor to cause the apparatus to: selecting a non-coherent modulation configuration from a group of modulation configurations based at least in part on a radio frequency spectrum band used by the receiving device to communicate with the transmitting device; receiving an indication from the transmitting device that a non-coherent single carrier frequency domain multiple access (SC-FDMA) mode has been selected for transmitting the data set; Receiving a time domain waveform in a symbol period of the radio frequency spectrum band; generating a set of frequency domain symbols from the time domain waveform using a discrete Fourier transform; Demapping the set of frequency domain symbols from a set of subcarriers in the radio frequency spectrum band; generating a set of modulated symbols from the demapped set of frequency-domain symbols using an inverse discrete Fourier transform; as well as The set of modulated symbols is demodulated using differential phase shift keying (DPSK) demodulation based at least in part on the non-coherent modulation configuration to obtain a data set.

Images