877results about "Multiple modulation transmitter/receiver arrangements" patented technology

Accordingly, there are disclosed herein receivers and receiving methods that provide a graceful transition from PAM2 to PAM4 signaling. One illustrative method includes: negotiating a link speed having PAM4 signaling; performing adaption of at least one gain or filter coefficient during PAM2 signaling; switching to PAM4 detection before receiving PAM4 signaling; disabling said adaptation before said switching to PAM4 detection; detecting PAM4 signaling using at least one statistic of detected PAM4 symbols; and enabling said adaptation after PAM4 signaling is detected. Another illustrative method includes: negotiating a link speed having PAM4 signaling; adapting at least one of gain and filter coefficients during PAM2 signaling; monitoring for a change in at least one signal characteristic while performing PAM2 detection; and transitioning to PAM4 detection after detecting said change.

Systems, methods, and instrumentalities are described herein for adaptive waveform selection for wireless communication. In examples, the wireless transmit / receive unit (WTRU) may be configured with the orthogonal frequency-division multiplexing (OFDM) initially. If the WTRU, which may support dynamic waveform switch, receives system information blocks (SIBs) from multiple cells where at least one of them supports dynamic waveform switch, the WTRU may prioritize the initial access with the cell(s) that support dynamic waveform switch. If the WTRU supports dynamic waveform switch, the WTRU may send a physical uplink shared channel (RUSCH) in msg3 at a configured grant, which may be offset by a preconfigured number of slots with a waveform that is different from the preconfigured waveform type.

The invention discloses a dual-mode differential chaos shift keying method combining carrier and time slot index modulation, and belongs to the technical field of communication. A chaotic signal generator is used at a transmitting end to generate a chaotic signal cx, a reference signal is generated after MS + 1 times of copying is achieved through Kronecker product operation, and Hilbert transformation is carried out on the chaotic signal cx to generate an orthogonal signal cy. The information index bit is a modulation bit transmitted by performing k combination mapping on a frequency domain and a time domain by using a carrier index and a time slot index and constructing two distinguishable signal modes of DCSK and QCSK. And finally, distributing the signals to subcarriers with different frequencies by adopting a multi-carrier technology to carry out overall signal transmission. And after the signal of each subcarrier is demodulated at a receiving end, the noise interference of the reference signal is reduced through a noise reduction module. And then, original input index information is recovered through related demodulation of carrier waves and time slots and a corresponding mapping rule, and finally, modulation bit information is recovered by adopting dual-mode demodulation.

Various embodiments herein provide techniques for dynamic transform precoding indication for a physical uplink shared channel (PUSCH) transmission and / or a msg3 transmission associated with a random access channel (RACH) procedure. For example, a downlink control information (DCI) that schedules a PUSCH may include a field to indicate whether transform precoding is enabled or disabled for the PUSCH. Additionally, or alternatively, the uplink grant received in the msg2 of the RACH procedure may include an indication of whether transform precoding is enabled or disabled for the msg3. Other embodiments may be described and claimed.

The invention discloses a signal identification method based on broadband spectrum detection, and the method comprises the steps: carrying out the power spectrum estimation and signal detection of broadband IQ data through an FPGA, obtaining a signal frequency point parameter, and configuring a DDC module to complete digital down conversion; performing power spectrum density estimation and noise floor estimation on the narrowband IQ signal on the upper computer; preliminary classification is carried out by calculating a ratio parameter C1 of a maximum value and a second maximum value of a frequency spectrum, and when C1 is greater than a threshold, AM and a single carrier signal are discriminated by combining a frequency spectrum characteristic parameter C2 and an amplitude spectrum characteristic parameter C3; when C1 is smaller than or equal to a threshold, signal detection is carried out by adopting a double-threshold algorithm, and merging and screening in a multi-signal scene are completed; classifying based on a normalized zero center instantaneous amplitude spectrum density maximum value parameter C4, judging FM, MSK and FSK signals when the C4 is less than a threshold, and judging BPSK, QPSK, 8PSK and 16QAM signals when the C4 is greater than or equal to the threshold; according to the method, a multi-parameter joint judgment strategy is adopted, and the accuracy and the real-time performance of signal recognition are remarkably improved.

Disclosed are methods, systems, and computer-readable medium to perform operations including generating a low-power wake-up signal (LP WUS) having a first portion of information bits carried by one or more orthogonal frequency-division multiplexing (OFDM) symbols via modulation based on multi-carrier on / off keying (MC-OOK) and a second portion of information bits carried by a bit-to sequence mapping on the one or more OFDM symbols; and transmitting, to a set of one or more user equipment devices (UEs), the generated LP WUS.

A communication method and device are applied to the technical field of communication, can be applied to a wireless local area network system of a next generation Wi-Fi protocol of IEEE 802.11 ax, such as 802.11 be, Wi-Fi 7 or EHT, and 802.11 series protocols such as 802.11 bn, Wi-Fi 8, UHR, Wi-Fi AI, millimeter wave (MMW) and the like, and can also be applied to a WPAN system supporting UWB, a sensing system and the like. A first communication device generates a PPDU and transmits the PPDU. The second communication device receives the PPDU and analyzes the PPDU. The PPDU comprises first indication information, the first indication information can be used for indicating a first modulation mode set and a coding rate, and the first modulation mode set is one of N modulation mode sets divided based on W modulation modes. The Q modulation modes in the first modulation mode set are used for modulating the PPDU.

A first device, including: a processor and a memory, where the memory is configured to store a computer program, the processor is configured to call and run the computer program stored in the memory, to cause the first device to perform: transmitting a first signal to a second device, where the first signal is backscatter-transmitted by the first device based on a second signal, a symbol length corresponding to the first signal is N times a symbol length corresponding to the second signal, and the second signal is transmitted by a third device, where N is a positive integer greater than 1.

The invention provides a communication method and a communication device. The method provides a scheme capable of further improving spectrum efficiency of data transmission. The method includes a first device generating first data (e.g., which may be a physical layer protocol data unit, or partial data of the physical layer protocol data unit), and transmitting the first data to a second device on a resource unit that corresponds to or uses at least two different modulation and coding policies. Wherein the resource unit can be any one of a 26-tone resource unit, a 52-tone resource unit, a 106-tone resource unit, a 242-tone resource unit, a 484-tone resource unit and a 996-tone resource unit. By enabling the resource unit to use at least two different modulation and coding strategies to perform data transmission in one transmission process, the spectrum efficiency of data transmission can be further improved.

The embodiment of the invention discloses a data processing method for optical communication and a related device, which adopt inner code coding with higher gain to improve the performance of cascade coding, can be better compatible with DP-16QAM (quadrature amplitude modulation) and DP-QPSK (differential phase shift keying) modulation, and can be favorably applied to high-baud-rate long-distance transmission scenes such as 800G and 1.6 T-ZR. Specifically, firstly, a first bit set is obtained, the first bit set comprises d1 bits, d1 = 244664 * L, and L is a positive integer. Then, first FEC coding is carried out on the first bit set to obtain a second bit set, the second bit set comprises d2 bits, every 244664 bits in the first bit set are subjected to first FEC coding to obtain every 261086 bits in the second bit set, and d2 = 261086 * L; next, adding dpad filling bits to the second bit set to obtain a third bit set, dpad being an integer greater than or equal to 0; and performing second FEC coding on the third bit set to obtain a fourth bit set.

The invention discloses a multi-mode underwater acoustic communication system and communication method based on a heterogeneous dual-core architecture, and belongs to the technical field of underwater acoustic communication. The multi-mode underwater acoustic communication system comprises a main control module, an acquisition module and a transmitting module; the main control module adopts a dual-core heterogeneous processor OMAPL138 formed by an ARM core processor and a DSP core processor; inter-core communication is carried out between the ARM core processor and the DSP core processor through a shared memory and interruption; the ARM core processor is responsible for protocol analysis, task scheduling and man-machine interaction, and the DSP core processor focuses on signal processing and real-time control and integrates four communication systems, a channel evaluation module and the like. The problems that application of a single communication mode is limited and underwater acoustic communication links in different complex sea areas are unstable are effectively solved, and the deep sea area underwater vehicle information collaboration and return and deep sea area observation and monitoring network system capacity are effectively improved and guaranteed.

Presented are apparatuses, devices, and methods for generating an integrate sensing and communication (ISAC) waveform that enables low-complexity radio-frequency (RF) based sensing parameter detection, may enable embedding digital low rate information in the sensing signal, and may enable low-complexity data decoding with acceptable performance.

The wireless transmission device includes a power amplifier that varies transmission power. An SNR degradation amount calculation unit calculates an SNR degradation amount {QAM} caused by QAM and an SNR degradation amount {APSK} caused by APSK on the basis of input / output characteristics of the power amplifier acquired from an input / output characteristic storage unit, a QAM modulated signal acquired from a QAM modulation unit, an APSK modulated signal acquired from an APSK modulation unit, and the transmission power of the power amplifier. A modulation scheme selection unit acquires a required SNR {QAM} of QAM and a required SNR {APSK} of APSK from a required SNR storage unit, compares “required SNR {QAM}+SNR degradation amount {QAM}” with “required SNR {APSK}+SNR degradation amount {APSK}”, and selects the modulation scheme with the smaller value.

Proposed are a method and device for receiving a PPDU in a wireless LAN system. Specifically, reception STAs receive a PPDU from a transmission STA, and decode the PPDU. The PPDU includes a legacy preamble, an EHT preamble, and a data field. The EHT preamble includes first and second fields. The first field includes information about the type of the PPDU. The second field includes information about the number of the reception STAs to receive the PPDU.

This disclosure provides methods, components, devices and systems for signaling designs for unequal modulation and modulation and coding scheme (MCS) indication. Some aspects more specifically relate to user info field designs to support such an unequal modulation indication and / or an MCS indication, including designs for user info fields of multi-user (MU) physical layer (PHY) protocol data units (PPDUs) and of Trigger frames. In some examples, an access point (AP) may configure a user info field to include at least five bits for MCS signaling, which may enable the AP to uniquely identify an MCS from a set of greater than 16 MCSs. Additionally, or alternatively, the AP may configure a user info field to include a subfield indicative of a pattern of modulation schemes (such as an equal modulation or an unequal modulation) across a set of spatial streams allocated for communication between the AP and a station (STA).

Provided are a data processing method and module, an electronic device, and a storage medium. In the data processing method, mapping bits of N symbols to bit positions of modulation symbols includes mapping all bits of at least one symbol among the N symbols to bit positions of a modulation symbol that have the same reliability level, where N is an integer, and N>1.

The invention provides a data transmission method and device and a storage medium, relates to the technical field of communication, and is used for supporting data transmission of various different waveform types. The method comprises the steps that a parameter set is selected from N parameter sets, the parameter set comprises a first indication and a second indication, the first indication is used for indicating an execution mode of first inverse Fourier transform, and the second indication is used for indicating an execution mode of second inverse Fourier transform; and performing data transmission based on the selected group of parameter sets.

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive an indication of one or more waveforms supported by a base station, wherein the one or more waveforms include at least one of an orthogonal frequency division multiplexing (OFDM) waveform, a single carrier frequency domain (SC-FD) waveform, or a single carrier time domain (SC-TD) waveform. The UE may determine, based at least in part on the indication, whether the UE is able to communicate with the base station. The UE may selectively communicate with the base station using at least one of the one or more waveforms based at least in part on the determination. Numerous other aspects are provided.

The present invention relates to a wireless communication method and a wireless communication terminal using a non-contiguous channel. To this end, provided are a wireless communication terminal including a processor and a transceiver, wherein the processor receives a wireless packet through the communication unit, obtains total bandwidth information indicated via a bandwidth field of HE-SIG-A of the received packet, obtains information of an unassigned resource unit via at least one of the bandwidth field of the HE-SIG-A and a subfield of HE-SIG-B of the received packet, and decodes the received packet based on the total bandwidth information and the information of the unassigned resource unit and a wireless communication method using the same.

Device, methods, and systems for implementing aspects of orthogonal time frequency space (OTFS) modulation in wireless systems are described. In an aspect, the device may include a surface of an object for receiving an electromagnetic signal. The surface may be structured to perform a non-electrical function for the object. The surface may generate an electrical signal from an electromagnetic signal. The electromagnetic signal may be received from a transmitter. The transmitter may map digital data to a digital amplitude modulation constellation in a time-frequency space. The digital amplitude modulation constellation may be mapped to a delay-Doppler domain and the transmitter may transmit to the surface according to an orthogonal time frequency space modulation signal scheme. The apparatus may further include a demodulator to demodulate the electrical signal to determine digital data.

A method of a second communication node may comprise: obtaining a compensated first reception signal by performing channel estimation between a first communication node and a second communication node for a first transmission signal received from the first communication node; obtaining an offset-demodulated signal and a first demodulated bit sequence by performing offset-demodulation on the first reception signal; obtaining a frequency-domain signal by performing time-to-frequency domain transform on the offset-demodulated signal; obtaining a complex signal sequence by performing subcarrier deallocation on the frequency-domain signal; obtaining a second demodulated bit sequence by performing QAM demodulation on the complex signal sequence according to the first demodulated bit sequence; and obtaining a final demodulated bit sequence by performing reassembly on the first demodulated bit sequence and the second demodulated bit sequence.

A UE of a wireless communication network first receives a modulation and coding scheme index IMCS for demodulating a physical layer data channel of the network. The UE then demodulates the physical layer data channel with a non-square quadrature amplitude modulation (NS-QAM) having a modulation order and code rate corresponding to a spectral efficiency (SPEFF) substantially equal to a SPEFF of a square QAM (S-QAM) SPEFF indicted by the IMCS, where the NS-QAM has an effective channel code rate no larger than the code rate for which the UE may skip decoding a transport block in an initial received transmission.

Some aspects of the present disclosure provide methods and devices that enable a framework for selection or configuration, or both, of a waveform for use in integrated sensing and communications (ISAC). Use of the framework provides a new waveform, based in part on various criteria, which provides a trade-off among different ISAC requirements. Therefore, when different criteria are important for a particular implementation, a waveform that best meets the requirement of those criteria may be used. The various criteria may include factors such as hardware constraints at the UE, radio frequency (RF) chirp generation or detections capability at the UE, spectral emission or leakage such as OOBE, sensing performance, and sensing complexity. In some embodiments, a cyclic prefix (CP) is provided to use the chirp-based sensing waveforms as a demodulated reference signal (DMRS). In some embodiments, the CP enables alignment with a communication signal frame.

Disclosed are a data transmitting method, a data receiving method, a network device and a non-transitory computer-readable storage medium. The data transmitting method may include: acquiring first data information and second data information; performing encoding processing on the first data information according to a first resource priority tag to obtain first encoded information, and performing encoding processing on the second data information according to a second resource priority tag to obtain second encoded information; performing signal modulation processing on the first encoded information to obtain first service information, and performing signal modulation processing on the second encoded information to obtain second service information, wherein the first service information comprises the first resource priority tag, and the second service information comprises the second resource priority tag; and transmitting the first service information and the second service information.

A terminal device (2) according to the present disclosure includes a control unit (203). The control unit (203) acquires, from a base station apparatus (1), information about a signal waveform for use, of a plurality of signal waveforms including a single carrier signal, the signal waveform for use being used for downlink communication with the base station apparatus (1), the information being transmitted by using a predetermined signal waveform of the plurality of signal waveforms. The control unit (203) performs the downlink communication with the base station apparatus (1) by using the signal waveform for use, on the basis of the information.

Some techniques described herein provide autonomous modification of a modulation and coding scheme (MCS) of a grant for a transmission by a user equipment UE. For example, the UE may receive a grant (e.g., a configured grant) indicating a resource allocation and a first MCS for a transmission on the resource allocation. The UE may use the resource allocation for a transmission of a number of transport blocks (e.g., one or more transport blocks), and may use a second MCS, different than the first MCS, for the transmission. In some examples, the second MCS may be a lower MCS, associated with a lower modulation scheme and / or code rate, than the first MCS. Thus, a per-resource-block power consumption of the transmission is decreased by using the second MCS, which provides power savings while reducing or eliminating padding of the uplink communication.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first network entity may encode first information using keying modulation. The first network entity may encode second information using frequency modulated continuous waveform (FMCW) modulation. The first network entity may transmit a communication that includes a first layer indicating the first information and a second layer indicating the second information. Numerous other aspects are described.

A gateway includes a modulation scheme conversion device which includes a backscattering tag and a tag signal generation unit configured to provide a tag signal to the backscattering tag. The modulation scheme conversion device multiplies a radio signal based on a Bluetooth low energy (BLE) protocol, which has been modulated with a first modulation scheme, and the tag signal to produce a multiplied signal and to reshape the multiplied signal using a second modulation scheme to produce a reshaped signal and backscatters the reshaped signal. The multiplied signal, which is reshaped with the second modulation scheme and backscattered, is provided to a receiver of second modulation scheme signals and then provided to the Internet. The signal modulated with the second modulation scheme is a WiFi signal based on an IEEE 802.11b protocol.

A synchronization method involves operations at a timing source and at distant timing circuits each communicatively coupled to the timing source. At the timing source, a reference signal having a reference frequency is generated; a multi-tone waveform is generated; and the reference signal and the waveform are combined to generate a synchronization signal having first temporal portions including the reference signal without the waveform, interspersed with second temporal portions including the waveform. The synchronization signal is transmitted to the timing circuits over each of plural signal paths having different respective propagation delays. Each of the timing circuits determines a phase difference between the received tones to determine a propagation delay of the connected signal path. Each reference signal is individually delayed at the timing circuits based at least on the propagation delay such that the timing circuits provide phase aligned output reference signals.

In one embodiment, a method performed by a User Equipment (UE) comprises receiving, from a base station, information that configures the UE with radio resource pools, wherein: each radio resource pool comprises one or more time-frequency radio resources; each radio resource pool is associated with one or more transmission related parameters comprising any one or more of: a configured modulation and coding scheme, a configured transport block size, and a configured repetition number; and each radio resource pool is associated with a plurality of orthogonal resources. The method further comprises selecting a radio resource pool from among the configured radio resource pools, selecting a time-frequency radio resource from among the time-frequency radio resources comprised in the selected radio resource pool, selecting an orthogonal resource from among the orthogonal resources associated to the selected radio resource pool, and transmitting a Physical Uplink Shared Channel (PUSCH) accordingly.