479results 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 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.

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).

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.

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.

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.

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.

The present application discloses an uplink data transmission method, apparatus, terminal and medium, which belongs to the field of communication technology. The uplink data transmission method of an embodiment of the present application includes: when a UE is configured to adopt a first waveform to transmit uplink data, the UE receives target downlink control information DCI from a network side device, and the target DCI is used to schedule target uplink data; when the indication information included in the target DCI meets a first preset condition, the UE adopts a second waveform to transmit the target uplink data; wherein the above-mentioned indication information is used to indicate: transmission parameters of the target uplink data.

Certain aspects of the present disclosure provide a method for wireless communications at a receiver node. The receiver node may receive an indication of a modulation scheme being used for one or more data transmissions from a transmitter node. The transmitter node may transmit a data transmission to the receiver node. The receiver node may detect the data transmission from the second wireless node based on the modulation scheme indicated to the receiver node.

Systems and methods are described for generating and implementing return-link satellite communications using a novel 1+N-ary constellation. The 1+N-ary constellation arranges M (e.g., 8) constellation points in a novel formation that increases their distances from each other relative to conventional M-ary modulation schemes by locating an inner constellation point centrally with respect to an I-Q plane and distributing the remaining N (i.e., M=N+1) outer constellation points radially around the inner constellation point. 1+N amplitude and phase-shift keying (APSK) modulation can be used to map symbols to the constellation. Embodiments combine the 1+N APSK modulation with additional features, such as non-Nyquist partial response (NNPR) filtering and / or state of the art low-density parity check (LDPC) coding.

A method implemented by a Wireless Transmit / Receive Unit (WTRU) includes receiving a DeModulation Interference Measurement (DM-IM) resource, determining an interference measurement based on the DM-IM resource, and demodulating a received signal based on the interference measurement. An interference is suppressed based on the interference measurement. At least one DM-IM resource is located in a Physical Resource Block (PRB). The DM-IM resource is located in a PRB allocated for the WTRU. The DM-IM resource is a plurality of DM-IM resources which form a DM-IM pattern, and the DM-IM pattern is located on a Physical Downlink Shared Channel (PDSCH) and / or an enhanced Physical Downlink Shared Channel (E-PDSCH) of at least one Long Term Evolution (LTE) subframe. The DM-IM resources are different for different Physical Resource Blocks (PRB) in the LTE subframe. The DM-IM is located in a Long Term Evolution (LTE) Resource Block (RB), and the DM-IM pattern is adjusted.

Various aspects of the present disclosure generally relate to wireless communication. 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 whether the UE is capable of communicating with the base station based at least in part on the indication. The UE may selectively communicate with the base station using at least one waveform of the one or more waveforms based at least in part on the determination. Numerous other aspects are provided.

Embodiments of the present disclosure relate to method and apparatus for transform precoding state switching for a physical uplink shared channel (PUSCH). According to some embodiments of the disclosure, a UE may include: a transceiver configured to: receive first indication information indicating a transform precoding state for a PUSCH transmission, wherein the transform precoding state indicates whether a transform precoding is enabled or not; and a processor coupled to the transceiver and configured to: determine whether to apply the transform precoding state to a first PUSCH transmission.

Disclosed are techniques for wireless sensing. In an aspect, a transmitter device modulates one or more information bits onto one or more sensing symbols based on a delay shift coding scheme to generate a joint communication and sensing (JCS) waveform, wherein the delay shift coding scheme provides a delay shift from a symbol boundary of each of the one or more sensing symbols to a sensing period within each of the one or more sensing symbols, and transmits the JCS waveform, wherein the JCS waveform comprises a sensing waveform within the sensing period within each of the one or more sensing symbols.

Provided in the embodiments of the present disclosure are a carrier phase tracking method and device for an orthogonal frequency division multiplexing (OFDM) multi-carrier system. The method includes: performing frequency domain tracking on a received current OFDM symbol and determining a phase of each subcarrier; analyzing a phase curve of all subcarriers and determining an inter-symbol phase average offset, and the inter-symbol phase average offset is used to characterize an estimated value of a difference obtained by subtracting a second value from a first value, the first value is a carrier phase value of the current OFDM symbol, and the second value is an estimated value of a carrier phase of a previous OFDM symbol; and performing time domain tracking by using the inter-symbol phase average offset as an input phase and determining an estimated value of a carrier phase of the current OFDM symbol.

The invention provides a communication and positioning integrated sonar system, and relates to the technical field of communication, and the system comprises a communication module which is used for determining a communication algorithm according to an obtained communication distance and the signal-to-noise ratio of an original communication signal, carrying out the modulation and coding of the original communication signal through the communication algorithm, and transmitting the modulated and coded original communication signal to a communication module. Generating a communication code stream; the communication and positioning integrated module is used for embedding a preset original positioning signal into the communication code stream to generate a fusion signal through a coding multiplexing technology; and the positioning module is used for determining a positioning algorithm according to the signal-to-noise ratio and the coherent interference coefficient of the fused signal, and generating corresponding position information through the positioning algorithm according to the positioning information in the fused signal. According to the invention, the information transmission efficiency of the sonar system can be effectively improved.

There is provided a method of switching between Discrete Fourier Transform spread Orthogonal Frequency Division Multiplexing (DFT-S-OFDM) and Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) in a mobile communication system. The method is performed by a g NodeB (gNB), and includes (a) preparing a Medium Access Control (MAC) layer communication message that specifies which of DFT-S-OFDM or CP-OFDM will be used for an uplink (UL) waveform, and (b) dynamically transmitting the message to user equipment. There is also provided an apparatus that performs the method, and a storage device that contains instructions that cause a processor to perform the method.

This invention discloses a method and apparatus for single-channel blind source separation of wireless signals based on deep neural networks. Specifically, in the training phase, a signal dataset is created, including a training set and a validation set; a dual-path complex time-domain convolutional network is constructed; a custom network training objective function is created; the obtained signal dataset is used to train and validate the dual-path complex time-domain convolutional network, resulting in a trained dual-path complex time-domain convolutional network; in the application phase, the time-frequency aliased signal to be separated is acquired through a single antenna; the time-frequency aliased signal is segmented and processed to obtain a fixed-length complex-form aliased signal; using the trained dual-path complex time-domain convolutional network, multiple signals are separated from the complex-form aliased signal and sent to a demodulator for demodulation to recover the bit data of the separated signal. This invention can effectively separate simultaneously and in-frequency mixed signals under single-antenna reception conditions, improving the anti-interference capability of wireless communication.

Methods, systems, and apparatus, including computer programs encoded on computer-storage media, for processing communications signals using a machine-learning network are disclosed. In some implementations, pilot and data information are generated for a data signal. The data signal is generated using a modulator for orthogonal frequency-division multiplexing (OFDM) systems. The data signal is transmitted through a communications channel to obtain modified pilot and data information. The modified pilot and data information are processed using a machine-learning network. A prediction corresponding to the data signal transmitted through the communications channel is obtained from the machine-learning network. The prediction is compared to a set of ground truths and updates, based on a corresponding error term, are applied to the machine-learning network.

Embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media for supporting various constellations. According to embodiments of the present disclosure, a first device receives, from a second device, configuration information indicating at least one constellation available for a modulation and coding scheme, MCS. The first device receives, from the second device, control information for a communication between the first and second devices. The control information indicating the MCS. The first device performs the communication with the second device based on the control information using a constellation of the at least one constellation.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitter node may determine a set of parameters for a waveform to be transmitted by the transmitter node, wherein the waveform is to use an allocated bandwidth that is larger than a sweeping bandwidth of a frequency modulated continuous wave (FMCW) chirp. The transmitter node may transmit the waveform according to the set of parameters. Numerous other aspects are described.

A method of providing a modulated signal for transmission is disclosed. The method includes selecting a modulation symbol, and operating a signal generator to provide the selected modulation symbol for transmission.Each available modulation symbol has a symbol duration, includes a pulse, and indicates information by a combination of an amplitude of the pulse and a carrier phase of the pulse. A position of the pulse is defined within the symbol duration, and at least two of the available modulation symbols have different symbol durations.The combination may further include the position of the pulse.In some embodiments, the pulse represents an end of the available modulation symbol, and the pulse is preceded by a silent period.A corresponding method of processing a received signal of modulation symbols is also disclosed; as well as corresponding computer program products, apparatuses, and communication devices.

This application discloses an information transmission method and apparatus, a terminal, and a network-side device, pertaining to the field of communication technologies. The method of embodiments of this application includes: sending, by a terminal, terminal assistance information related to waveform switching; and performing, by the terminal, the waveform switching; where the terminal assistance information includes at least one of the following: first information related to a first power headroom corresponding to a first waveform; first delta information, where the first delta information is used to indicate a delta of first parameters corresponding to different waveforms; second delta information, where the second delta information is used to indicate a delta of first parameters corresponding to different modulation schemes of a same waveform; a maximum transmit power of the terminal corresponding to the first waveform; information related to a second parameter; and second information related to a maximum permissible exposure MPE corresponding to the first waveform; where the first waveform is a waveform other than a second waveform; and the second waveform is a waveform actually used for physical uplink channel transmission of the terminal.

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 non-contiguous channel allocation information of the received packet, and decodes the received packet based on the obtained non-contiguous channel allocation information and a wireless communication method using the same.