882results about "Phase-modulated carrier systems" patented technology

Embodiments herein provide techniques for transmission of a physical uplink control channel (PUCCH) in a wireless cellular network. For example, transmission schemes are provided for sequence-based transmission of a PUCCH and / or to improve PUCCH coverage. User equipment (UE) may: determine uplink control information (UCI) pay load information for the PUCCH with a PUCCH format 1; determine a sequence for transmission of the PUCCH based on the UCI pay load information; and map the determined sequence to allocated resources for the PUCCH format 1 for transmission.

A communication device for providing a channel state information, CSI, feedback in a wireless communication system includes a transceiver to receive, from a transmitter a radio signal via a time-variant, frequency-selective MIMO channel, the radio signal including downlink reference signals according to a reference signal configuration including a number of antenna ports, and downlink signals including the reference signal configuration; and a processor. The processor estimates an explicit CSI in the frequency domain using measurements on the downlink reference signals on the radio channel, selects a Doppler-delay precoder matrix (W) for a composite Doppler-delay-beam three-stage precoder, calculates either one or more of a channel quality indicator, CQI, and / or a precoder matrix indicator, PMI, and / or a rank indicator, RI, and reports to the transmitter the CSI feedback including either one or more of the CQI, and / or the PMI and / or the RI.

Embodiments are provided wherein a mobile device that is associated with a cellular system is configured to communicate with a second device that is associated with the cellular system subject to a time-varying, dispersive, multipath fading environment. The mobile device comprises an antenna system comprising a plurality of polarizations and a processor that is configured to reduce a cross-polarization interference caused by said time-varying, dispersive, multipath fading environment while the mobile device uses a first polarization and a second polarization of the plurality of polarizations to increase a transmission throughput of information and / or a reception throughput of information. The mobile device is further configured to perform operations including processing first and second signals received respectively on the first and second polarizations and to use a plurality of receive channel coefficients to perform first and second mathematical operations on the first and second signal, respectively.

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.

Methods, systems, and devices for wireless communications are described. A wireless communication device may receive a communication signal that includes multiple layers. The signal may include at least one layer that is associated with a probabilistic shaping signal. The wireless communication device may apply one or more probabilistic shaping parameters to the communication signal and obtain a preprocessed signal. The application of the one or more probabilistic shaping parameters may include performing one or more matrix decomposition operations to obtain the preprocessed signal and a preprocessed channel estimate. The preprocessed signal and the preprocessed channel estimate may include probability information associated with the probabilistic shaping signal based on the application of the one or more probabilistic shaping parameters. Accordingly, the wireless communication device may demodulate the communication signal based on the preprocessed signal information.

The invention relates to a power equipment multi-modal data real-time acquisition and monitoring system based on a star flash ad hoc network, and belongs to the technical field of power Internet of Things. Aiming at the problems of high communication delay, large multi-source data fusion error and poor complex environment adaptability in power equipment monitoring, the method comprises the following steps: 1) constructing a star-flash dynamic ad hoc network, and modulating by adopting FHSS frequency hopping and QPSK-polarization code (error rate lt; 10-6) the anti-interference performance is improved; 2) designing a multi-modal data space-time alignment algorithm (IEEE 1588v2 + DTW interpolation) and a dynamic weight fusion strategy (normal / fault working condition weight 0.6-0.2); and 3) three-dimensional visualization and edge AI fault positioning are realized based on digital twinning, and the accuracy rate is 98.5%. The system reduces the operation and maintenance cost by 67%, and is suitable for high-precision monitoring scenes such as a transformer substation.

The invention relates to the technical field of wireless communication, in particular to an OTA upgrading method and system for Bluetooth sound equipment. The method comprises the following steps: acquiring to-be-upgraded firmware data and currently played audio data, and acquiring power amplifier current feedback data of a sound speaker by sending a double-frequency detection signal containing 21kHz and 22kHz; acquiring equipment transmission capability confirmation data according to a silent response mode of the sound equipment to the preset handshake signal; and calculating a nonlinear distortion coefficient of the loudspeaker according to the intensity of the 1kHz difference frequency component in the power amplifier current feedback data, and obtaining real-time channel evaluation data based on current waveform deviation analysis. According to the method, the nonlinear distortion degree of the loudspeaker is accurately evaluated through the 1kHz difference frequency component generated by the 21kHz and 22kHz dual-frequency detection signals, so that the reliability of data transmission is more accurately predicted.

The invention discloses an HRR-based acoustic fire hazard type identification method, device and equipment and a medium, and relates to the technical field of fire hazard detection, and the method comprises the steps: obtaining an original acoustic signal through transmitting a high-frequency modulation ultrasonic wave and receiving a flame region reflection echo, obtaining channel impulse response data through channel estimation, and carrying out the channel impulse response data; flame features are extracted, a heat release rate curve is calculated and generated, finally fire type identification and fire behavior stage determination are completed based on the curve, dense smoke, shielding and illumination interference can be resisted, accurate quantification of the heat release rate is realized, fire type identification and fire behavior development stage determination can be finely carried out, and the accuracy of fire behavior determination is improved. And a stable and reliable technical support is provided for fire monitoring and emergency decision making.

Wireless communications are described. A wireless device may be configured to transmit a first signal via a first cell group that may overlap in time with a second signal via a second cell group. The wireless device may adjust a signal transmission power of at least one of the first signal or the second signal. Additionally or alternatively, the wireless device may drop at least one of the first signal or the second signal. Adjusting and / or dropping at least one of the first signal or the second signal may be based on the overlap in time of these signals satisfying a duration threshold and a total power to transmit the first signal and the second signal exceeding a power threshold.

The invention discloses an active pen and touch screen interaction system resistant to common-mode interference and a signal demodulation method. The system comprises a signal receiving terminal and a signal transmitting terminal. The signal transmitting terminal modulates data to be transmitted by adopting a differential binary phase shift keying modulation method, and transmits a generated modulation signal to the signal receiving terminal; the analog front-end receiving module is coupled with the signal transmitting terminal, receives the modulation signal and outputs a digital square wave signal after fidelity extraction processing; and the digital demodulation processing module performs differential coherent digital demodulation on the digital square wave signal based on the prior characteristics of the modulation signal, inhibits residual noise and recovers data to be sent. The analog front end focuses strong common-mode noise suppression and analog filtering, the digital demodulation algorithm performs secondary digital purification by using signal time sequence characteristics, and the two constructs an efficient anti-interference pipeline. Meanwhile, the regular square wave signals can be directly processed through differential coherent demodulation, and the requirements for performance and power consumption of a rear-end processor are lowered.

The invention discloses a low-complexity MSK coded modulation system phase synchronization receiving system and method, and relates to the technical field of continuous phase modulation. On one hand, an original message is coded and modulated by constructing a pre-coding mode, a receiving end realizes optimal sampling point extraction at the minimum intersymbol crosstalk moment after phase decoupling frequency conversion processing, MSK is converted into BPSK-like modulation, oversampling processing is not needed, modulation phase components of a receiving synchronization section can be offset, and the modulation efficiency of the receiving synchronization section is improved; therefore, accurate estimation of Doppler phase and frequency is realized, and the anti-Doppler capability is improved. On the other hand, coherent demodulation soft information is directly output after the real part of the signal subjected to Doppler frequency offset and phase offset compensation is obtained, the complexity of the demodulation algorithm is low, the performance of the demodulation algorithm is equivalent to that of BPSK, the demodulation algorithm is remarkably superior to that of an MSK optimal demodulation receiver in a low signal-to-noise ratio region, and the demodulation algorithm is particularly suitable for a bit interleaving coding modulation system combined with channel coding and has a wide application prospect. And reliable transmission under a low signal-to-noise ratio can be realized.

One example according to the present specification relates to a technique related to configuration of a preamble in a wireless LAN (WLAN) system. According to various embodiments, a receiving STA may receive an NDP frame. The NDP frame may comprise a first signal field and a second signal field. The first signal field may comprise first information about a PHY version. The second signal field may comprise second information about transmission of a PPDU, set on the basis of the first information. The receiving STA may perform channel sounding on the basis of the NDP frame.

The invention discloses a finite geometric code decoding method and system based on a generalized check matrix, and relates to the communication technology, and the method comprises the following steps: constructing a corresponding generalized check matrix according to an algebraic structure of a multi-step large number logic decodable finite geometric code; sending a finite geometric code sequence, transmitting the sequence after coding and BPSK modulation, and receiving a posterior probability log-likelihood ratio sequence by a receiving end; and carrying out iterative decoding on the finite geometric code received by the receiving end based on the constructed generalized check matrix. According to the invention, a new generalized check matrix is constructed according to the algebraic structure of the finite geometric code, and multi-step large-number logic iterative decoding is carried out on the finite geometric code based on the matrix, so that the iterative decoding performance of the multi-step large-number logic decodable finite geometric code is improved.

The invention provides a signal modulation method and a related device, and the method comprises the steps: obtaining a first symbol sequence, carrying out the single-carrier modulation of the first symbol sequence, enabling the phase difference between two adjacent symbols in the first symbol sequence to be 90 degrees, enabling the single-carrier modulation to comprise the frequency spectrum adjustment based on a first scaling factor and the frequency domain spectrum shaping FDSS, the spectrum adjustment comprises spectrum compression; and determining a signal generated after the first symbol sequence is subjected to single-carrier modulation. According to the method, the first symbol sequence with the phase difference of 90 degrees between two adjacent symbols is subjected to single-carrier modulation, a single-carrier modulation scheme for performing frequency spectrum compression in a frequency domain is provided, the frequency spectrum efficiency is improved, and a single-carrier signal with low PAPR is generated.

The invention relates to the technical field of communication, and discloses an AI-based adaptive data encryption method and system, and the method comprises the steps: carrying out the frequency domain transformation analysis of an original data flow, and generating a spectrum distribution feature set; the carrier frequencies are screened through a dynamic frequency selection algorithm to obtain an optimal carrier frequency range; performing phase modulation on the data bit stream, and embedding the data bit stream into a subcarrier in an optimal carrier frequency range to generate a first encrypted data stream; when the interference intensity exceeds an interference threshold value, performing directional adjustment on a frequency deviation parameter according to an interference type, and generating a second encrypted data stream; dynamically adjusting the frequency distribution parameters according to the transmission distance data to obtain a frequency distribution parameter set; and performing adaptive modulation and spectrum shaping on the second encrypted data stream based on the frequency distribution parameter set, and outputting a hidden transmission data stream. The method has the following effect that the data hidden transmission capability and the receiving and restoring accuracy in a complex environment can be improved.

The invention discloses a short burst SOQPSK carrier synchronization method based on an RPT-Net network. The short burst SOQPSK carrier synchronization method comprises the following steps: preprocessing a signal, and merging time domain data of the signal and quartic data into input data; a multi-level residual convolutional network is adopted to extract cross-symbol local phase features, fine phase changes in SOQPSK signals are captured through layer-by-layer stacked convolution operation, the gradient degradation problem of a deep network is relieved in combination with a residual connection mechanism, and the local characterization capacity for phase jump and frequency offset disturbance is enhanced; through a phase perception position coding module, the time domain signal is converted into a complex number form, an instantaneous phase is extracted, orthogonal basis coding is constructed to represent phase change, and deep fusion with position coding is carried out; a Transform coding layer is introduced, a multi-head self-attention mechanism is utilized to capture a long-distance symbol dependency relationship, global phase consistency constraint is optimized, long-term influence of frequency offset on signals is captured, and time sequence error propagation is effectively inhibited.

The invention relates to a dynamic wireless key frequency hopping communication anti-interference system and a method thereof. The system comprises a transmitting end and a receiving end, the transmitting end comprises an information source scrambling module, a Turbo coding module, a spread spectrum module, a framing module, a frequency hopping pattern generation module and a forming filtering module; and the receiving end comprises a digital front-end processing module, a frequency hopping synchronization module, a signal synchronization module and a demodulation module. The frequency hopping pattern based on the chaotic system has high randomness and predictability, and tracking interference and eavesdropping are effectively resisted.

Apparatus, systems, and methods for a transmitter array for enhanced communication systems may be provided. According to an aspect a transmitter array may be provided. The transmitter array may include a plurality of equivalent transmitter units. Each equivalent transmitter unit may include an antenna and a QPSK modulator. Each equivalent transmitter unit may be selectively activatable. In some embodiments, upon activation of a set of equivalent transmitter units selected from the plurality of equivalent transmitter units, a desired modulated output signal is generated. According to another aspect, a method of generating a desired modulated output signal may be provided. The method may include receiving a plurality of local oscillator (LO) signals at a transmitter array. The method may further include selectively activating a set of equivalent transmitter units of the plurality of equivalent transmitter units to generate the desired modulated output signal.

This application relates to the field of wireless communication, and in particular, to a multi-channel hybrid transmission technology. In an embodiment, a data transmission method comprises: generating, by a first wireless communications device, a physical protocol data unit (PPDU), wherein the PPDU comprises a legacy short training field (L-STF), a legacy long training field (L-LTF), a legacy signal field (L-SIG), and two signature symbols after the L-SIG in a time-domain, and wherein the two signature symbols are identical and are modulated based on binary phase shift keying (BPSK), the two signature symbols identify a wireless communications standard the PPDU complies with; and transmitting, by the first wireless communications device, the PPDU to a second wireless communications device.

A DCI parsing method, a dynamic waveform switching determining method, an uplink receiving determining method, an apparatus, a terminal, and a network-side device. The DCI parsing method in an embodiment of this application includes: receiving, by a terminal, a first DCI from a network-side device, where the first DCI is used to schedule a first physical uplink shared channel PUSCH, and the terminal is a terminal with dynamic waveform switching capability or a terminal with dynamic waveform switching capability enabled; parsing, by the terminal, the first DCI according to a first preset rule; and determining, by the terminal, a transmission position of the first PUSCH based on a parsing result of the first DCI.

The invention relates to a transmitter device (100) and a receiver device (300) for repeated and offset QPSK DFT-s-OFDM modulation. The transmitter device (100) is configured to split a stream of bits (130) into an in-phase stream of bits (132) and a quadrature stream of bits (134) which are encoded with a 1 / R rate repetition code into an encoded in-phase stream of bits (142) and an encoded quadrature stream of bits (144) such that the encoded quadrature stream of bits (144) is offset in relation to the encoded in-phase stream of bits (142) with F number of bits, or vice versa. The encoded in-phase stream of bits (142) and the encoded quadrature stream of bits (144) are jointly modulated into a stream of QPSK symbols (150) which are modulated into DFT-s-OFDM, symbols (160) for transmission to the receiver device (300). The invention relates to corresponding methods and a computer program.

An integrated photonics millimeter wave (MMW) radar communication system based on analog phase modulation scheme includes an integrated photonics MMW radar communication signal transmitter, a radar receiver, and a communication receiver. The transmitter includes a radar communication signal analog phase modulation module, an optical frequency comb (OFC) module, an electro-optic modulator (EOM), an optical shaping filter, an optical power divider, a photoelectric detector, an electric power amplifier, and a transmitting antenna that are cascaded sequentially. The radar receiver includes a radar receiving antenna, an electric low-noise amplifier (LNA), an optical phase modulator, an optical bandpass filter (BPF), a low-speed photoelectric detector, an electric low-pass filter, and a low-speed oscilloscope that are cascaded sequentially. In the communication receiver, a communication receiving antenna is sequentially cascaded with an electric LNA, a frequency mixer, and an oscilloscope, and a voltage-controlled oscillator is cascaded with a frequency multiplier and then connected to the frequency mixer.

The embodiments of the present disclosure provide a method performed by a node in a wireless communication system, an electronic apparatus, and a storage medium. The method includes: demodulating first signals corresponding to received respective resource elements to obtain second signals corresponding to the respective resource elements and confidence of the second signals corresponding to the respective resource elements; selecting second signals corresponding to a first set of resource elements from among the second signals corresponding to the respective resource elements, according to the confidence of the second signals corresponding to the respective resource elements; determining channel state information corresponding to the first set of resource elements, according to the second signals corresponding to the first set of resource elements; determining channel state information corresponding to the respective resource elements, based on the channel state information corresponding to the first set of resource elements.

The invention relates to an underwater acoustic communication and positioning integrated signal design and processing method based on FDMA signal modulation, a medium and a device, and belongs to the field of underwater acoustic communication / positioning. And respectively modulating the integrated baseband signals to a plurality of pre-divided carriers with different center frequencies. Each carrier corresponds to an independent transmitter signal, and the center frequency interval of different transmitter signals is greater than the signal bandwidth. And the modulated signal is transmitted to an underwater environment through the underwater acoustic transducer. In the signal processing process, a band-pass filter bank is used for carrying out frequency separation on received signals, each filter corresponds to the center frequency of a transmitting signal, the separated signals are demodulated and decoded to recover original communication data, and the distance between a transmitter and a receiver is calculated by measuring time delay. And simultaneous communication interaction and high-precision positioning of multiple underwater users are realized.

The invention provides a semantic communication method and system, electronic equipment and a computer readable storage medium, and relates to the field of communication, in particular to the field of semantic communication and artificial intelligence. According to the specific implementation scheme, the method comprises the steps of inputting information source data into a pre-trained semantic encoder for semantic encoding, obtaining information source semantic features of the information source data, mapping the information source semantic features to a target codebook, and generating an information source index vector; transmitting the information source index vector from the transmitting end to the receiving end through the communication channel, and obtaining a channel index vector; obtaining a channel semantic feature according to the target codebook and the channel index vector, inputting the channel semantic feature into a pre-trained semantic decoder for semantic decoding, and generating reconstruction data; wherein the target codebook is determined according to the signal quality of the communication channel and an initial codebook; the initial codebook is obtained through joint training with the semantic encoder and the semantic decoder.

A method for performing multiple-input and multiple-output channel estimation includes: generating, using a first machine-learning model, an initial set of estimated channel information from a first input set of channel information, wherein the first input set of channel information corresponds to a first plurality of radio-frequency chains, and wherein the estimated set of channel information corresponds to the first plurality of radio-frequency chains and a second plurality of radio-frequency chains; generating, using a second machine-learning model, a set of estimated channel phases from the initial set of estimated channel information and a second input set of channel information, wherein the second set of input channel information corresponds to the second plurality of radio-frequency chains; and combining the initial set of estimated channel information and the set of estimated channel phases to generate an enhanced set of estimated channel information.

The embodiment of the invention relates to a method and device for user activity detection (UAD). A terminal device receives a configuration associated with a set of subcarriers from a network device in a radio access network, where the set of subcarriers is associated with a set of terminal devices in the radio access network for transmitting a modulated conjugate symmetric signal, the modulated conjugate symmetric signal indicates activity information of an active terminal device set in the terminal device set; and transmitting a modulated conjugate symmetric signal, where the modulated conjugate symmetric signal is generated by modulating subcarriers from the set of subcarriers with symbols, and the modulated conjugate symmetric signal includes sparse multicarrier (MC-FTN) conjugate symmetric signaling that is faster than Nyquist. In this way, a new solution for reducing latency and measurement resource costs for UAD for large-scale access is provided.

A method and a device for performing communication in a wireless communication system are disclosed. The method according to one embodiment of the present disclosure may comprise steps in which a first device: receives, from a network node, a first message including first information related to a first time resource interval for transmitting a second message; transmits the second message to the network node by using the first time resource interval; and, on the basis of the first message, receives a third message from the network node by using a second time resource interval, wherein the first message can include second information related to the relationship between the first time resource interval and the second time resource interval.

The invention provides a sodium ion energy storage SOC dynamic equalization and calibration method combined with carrier phase shift modulation, which comprises the following steps that: after an SOC acquisition module acquires voltage, current and temperature data of a sodium ion battery, a master control unit calculates an SOC value and constructs a global SOC deviation index, and when the SOC deviation index is greater than a preset threshold value, the SOC value is calculated by the master control unit; the main control unit sends a phase shift angle updating instruction to the carrier phase shift modulation module, so that the sodium ion battery with large SOC deviation preferentially participates in the equalization process, meanwhile, the carrier phase shift modulation module transfers energy of the sodium ion battery with high SOC to the sodium ion battery with low SOC, and when the equalization process is completed every time, the energy of the sodium ion battery with high SOC deviation is transferred to the sodium ion battery with low SOC. According to the method, the SOC value and the global SOC deviation index are calculated again until the global SOC deviation index is smaller than the preset threshold value, the problem that the performance of the battery pack is reduced due to SOC imbalance in a traditional method is solved by introducing a carrier phase-shifting modulation technology, and meanwhile, system parameters are optimized through a genetic algorithm, so that the efficiency and the accuracy of the equalization process are improved.

The invention discloses a short burst SOQPSK demodulation method and system based on a deep learning network, and belongs to the field of communication and deep learning, and the method comprises the steps: obtaining signal sample data comprising a short burst signal, and carrying out the preprocessing of the short burst signal; performing image processing on the preprocessed signal data to obtain image information input into the deep learning network; constructing and training a deep learning network, performing convolution operation on the image information to extract features, and adding the input image information and convolution output through residual connection; and carrying out time sequence feature extraction on the extracted signal features through a bidirectional long-short-term memory layer, and finally carrying out demodulation classification on output signals. The method has the advantages of being higher in demodulation capacity, high in robustness and the like, and has a better demodulation effect compared with a traditional method when timing errors, phase errors, frequency offset and phase offset exist.