119 results about "Symbol synchronization" patented technology

The invention provides an OFDM signal receiving and processing system and method suitable for an NAVDAT system. According to the method, the characteristics that NAVDAT system signals have synchronous headers, pilot frequencies and the like are fully considered, firstly, the synchronous headers are used for carrying out correlation operation on received data to search a frame starting point, and a signal frame to be demodulated and decoded is obtained in combination with a constant false alarm detection algorithm; and subsequently, carrying out symbol synchronization to determine the FFT window position. Secondly, in combination with a discrete pilot signal, estimating an integral multiple frequency offset error, namely coarse synchronization, and further realizing estimation of a decimal multiple frequency offset error, namely fine synchronization, so as to realize frequency synchronization. And then, channel estimation is carried out by using the pilot signal and adopting a least square method to obtain the channel frequency response of the pilot, the frequency response of the complete signal is obtained through interpolation, and the rough estimation result is further processed through the designed RCAFCN network to obtain accurate channel estimation, so that the original OFDM signal is recovered. And finally, extracting a data part in the OFDM signal according to a frame structure, realizing soft demodulation through a log-likelihood ratio mode, decoding data of a signaling part by using a polarization code, and decoding data of a service part by using a low-density parity check code, thereby realizing complete demodulation and decoding. The method provided by the invention can effectively reduce inter-symbol interference and inter-carrier interference existing in OFDM signals, compensate channel distortion, reduce noise influence, improve decoding precision, improve communication quality, realize optimization of NAVDAT system baseband processing, and guarantee sailing safety of ships on the sea by combining with an existing marine broadcast system.

The invention discloses an FPGA (Field Programmable Gate Array) implementation method of a DVB (Digital Video Broadcasting) high-speed demodulator. A digital signal enters a parallel DDC (Direct Digital Control) module and is re-adapted to multiple symbol rates; the parallel AGC module adjusts the power of the digital signal to a fixed power value; the method comprises the following steps: passing through Oamp; m algorithm: completing symbol synchronization; related peaks are extracted, and frame synchronization is completed; correcting the frequency to enable the frequency to reach participation frequency deviation; performing frequency compensation on the digital signal after loop filtering; after error information is calculated and filtered, the digital signal is compensated; and restoring the original information of the digital signal. According to the invention, by adopting the parallel processing module, the real-time performance and the parallelism degree of digital signal processing can be greatly improved, and the performance of the whole demodulator is enhanced. Each module is designed to be adaptive to the change of a digital signal, for example, the AGC module can dynamically adjust the power of the digital signal to ensure that the output digital signal is always kept at a fixed power level so as to adapt to different receiving conditions.

The invention belongs to the technical field of signal processing, and provides a blind demodulation method and device for a wireless signal, and the method comprises the steps: screening out a candidate modulation type from a plurality of modulation types according to the time domain features in the wireless signal; for each candidate modulation type, estimating a target parameter of the IQ data in the wireless signal corresponding to the candidate modulation type to obtain a target parameter estimation result; performing symbol synchronization processing on the target parameter estimation result to obtain a symbol synchronization point; calculating EVM (Error Vector Magnitude) corresponding to the candidate modulation type according to the symbol synchronization point, and determining the candidate modulation type corresponding to a minimum value as a target modulation type under the condition that the minimum value in the EVM corresponding to each candidate modulation type is smaller than or equal to an EVM threshold value; and demodulating the wireless signal based on the target modulation type to obtain a demodulation result. According to the method provided by the invention, the blind demodulation efficiency and accuracy of the composite modulation signal in a complex channel or a low signal-to-noise ratio environment are improved.

The invention provides a digital receiver circuit and a control method thereof. The digital receiver circuit comprises a frame synchronization detection module, a symbol synchronization detection module and a symbol decoding module, the frame synchronization detection module comprises a first matched filter and a first peak detection module; the first matched filter is used for performing convolution operation on a guide code sequence in the received synchronization signal to obtain a convolution operation result; the first peak value detection module is used for determining the position of a convolution peak value according to the convolution operation result; determining the end position of the guide code sequence according to the position of the convolution peak value; the symbol synchronization detection module is used for detecting positioning information of an end position of each symbol in effective data connected with the guide code sequence; according to the positioning information, determining a pulse sequence corresponding to a judgment moment of symbol decoding of the effective data; and the symbol decoding module is used for performing symbol decoding on the effective data according to the judgment time and the pulse sequence. The technology can improve the accuracy of signal detection and decoding.

The invention discloses a parallel transmission method from WiFi to LoRa, Bluetooth and ZigBee based on cross-protocol communication, which comprises the following steps: uniformly up-sampling wireless heterogeneous signals to the same sampling rate through a CCK symbol synchronization mechanism; generating a compensation carrier based on the estimated frequency offset, completing frequency band migration of different wireless heterogeneous signals according to the compensation carrier so as to place different signals on different carrier frequencies, and directly adding the generated wireless heterogeneous signals with different carrier frequencies in a time domain to obtain a mixed signal; and performing reverse engineering simulation on the mixed signal to obtain a WiFi signal carrying information of a plurality of wireless devices, performing scrambling processing on the WiFi signal, converting a scrambled bit stream into a radio frequency signal through a CCK modulator, and transmitting the radio frequency signal through an antenna. According to the invention, direct communication from WiFi to a plurality of Internet of Things devices can be realized.

The invention discloses an MAPSK blind equalization method and system suitable for a low signal-to-noise ratio complex channel environment. The system comprises a transverse filter, an error calculator and a weight vector updater, wherein the transverse filter is used for receiving an MAPSK signal sequence subjected to symbol synchronization processing and is provided with a plurality of taps, the error calculator is used for calculating the amplitude and / or phase error of a signal according to the output of the transverse filter, and the weight vector updater is used for updating the weights of the taps of the transverse filter according to the calculated error. According to the blind equalization method provided by the invention, rapid convergence can be realized in a low signal-to-noise ratio and complex channel environment, and the communication quality and reliability of satellite communication can be remarkably improved.

The invention discloses a low-power-consumption Bluetooth weak link communication method and device based on adaptive symbol extension and DNN demodulation technology, and the method comprises the steps: measuring a channel environment of a transmitting end, judging a current channel environment through transmitting different extension factors and data packet lengths, and determining an optimal symbol extension factor; sending data of a sending end, and after the optimal symbol expansion factor is determined, expanding a data packet and segmenting the data by a transmitter, and carrying out data de-whitening operation; a receiving end captures a BLE signal, captures the signal and preprocesses the signal; identifying a receiving end and positioning a BLE data packet, detecting a data packet preamble based on phase peak clustering, identifying the data packet and synchronizing symbols; and a receiving end demodulates the BLE signal to obtain final BLE data, and demodulates the wireless signal by adopting a demodulator based on a time-frequency domain combined DNN model. According to the invention, stable BLE communication can be maintained in a low signal-to-noise environment, the method is widely supported in commercial BLE chip equipment, the equipment does not need to be modified, and the communication capability of the BLE equipment in a weak link is improved.

The invention discloses a short-wave 2FSK signal symbol synchronization system and method in the technical field of signal burst detection, and the method comprises the steps: carrying out the signal energy detection of a short-wave 2FSK signal, and judging whether a signal burst exists or not; in response to existence of the signal burst, performing synchronization signal burst initial indexing; after a signal burst start index is synchronized, cumulative sum calculation is carried out on signal start part data in a single stepping mode, and a burst start position is determined; performing cross-correlation calculation on the burst through the feature sequence from the initial position of the burst, and determining a position index of a frame header; calculating the length of each frame based on the position index of the frame header; calculating an actual symbol rate based on the length of each frame in combination with a theoretical symbol rate; and carrying out symbol synchronization through the actual symbol rate. According to the method, the synchronization accuracy is improved, synchronization is carried out by calculating the accurate symbol rate, and subsequent code word judgment is facilitated.

The invention relates to a motion MPSK communication radiation source speed estimation method. The method comprises the following steps of: firstly, dividing a received MPSK signal into two paths, estimating motion phase deviation in one path by utilizing a minimum mean square error phase discrimination algorithm, compensating the motion phase deviation and demodulating a message symbol carried by the signal; carrying out signal segmentation on the other MPSK signal according to symbol synchronization information and a symbol period, and compensating a phase of a symbol waveform corresponding to a demodulated message symbol according to the demodulated message symbol; and finally, combining symbol waveform data after phase compensation into a two-dimensional matrix, and solving Doppler frequency for data of different symbols at the same sampling moment through a vertical Fourier transform method so as to obtain the speed of a moving target. Compared with a traditional sensing integrated speed measurement method, the method has the advantages of being low in probability of being found and long in operating distance.

The invention relates to the technical field of semiconductor radio frequency signal processing, and discloses a narrowband signal receiving system and method, and the system comprises a coarse frequency offset value capturing module, a carrier phase locking module, a digital domain carrier tracking module, a timing synchronization and multipath correction module, and a vector amplitude phase correction and equalization module. In the prior art, the technical problems of lock losing, judgment errors and high bit error rate caused by serious multipath interference and frequency offset drifting of narrow-band signals are difficult to solve in complex environments with multipath effect and high frequency offset, such as urban canyons, basements and warehouses. According to the invention, by introducing analog phase locking, digital fine tuning, dual-correlation symbol synchronization based on multi-path sensing and vector amplitude-phase combined compensation overall architecture with cooperation of analog and digital, the problems of synchronization failure and demodulation performance reduction caused by multi-path distortion in the prior art are avoided; and the sensitivity and the overall reliability of radio frequency signal receiving are remarkably improved.

The invention discloses a 32APSK parallel demodulation method and system, and the method comprises the steps: receiving a radio-frequency signal through an antenna, carrying out the frequency conversion processing through a receiving channel, converting the radio-frequency signal into an intermediate-frequency signal, carrying out the digital-to-analog conversion, obtaining an intermediate-frequency digital signal, carrying out the grouping according to a fixed length, and obtaining a data package with a fixed length, mixing the intermediate frequency digital signal in the data packet with two paths of in-phase orthogonal carriers to obtain a mixed signal, and filtering the mixed signal through a low-pass filter to generate an in-phase baseband signal and an orthogonal baseband signal; in-phase baseband signals and orthogonal baseband signals are sequentially subjected to resampling, frequency offset estimation, carrier synchronization, coherent demodulation and judgment to obtain judged signals, and finally equalization processing is carried out to remove inter-symbol interference. The method has the advantages of low data dependence and high degree of parallelism, symbol synchronization and carrier synchronization are realized by using an open loop after I and Q signals are acquired, the degree of parallelism is high, and the method is suitable for a GPU platform and 32 APSK signal demodulation at any rate.

The invention provides a frame header synchronization method based on a CPM constant envelope spread spectrum sequence, and belongs to the technical field of satellite-borne satellite communication. A traditional recursive feedback type structure based on a phase-locked loop (PLL) is optimized, and a matched filter, a resampling module and a delay locked tracking loop (DLL) module are added after frame header pulse detection and frequency offset estimation are completed by utilizing the differential self-correlation characteristic of a synchronous sequence. The single symbol rate timing error estimation result serves as negative feedback and is fed back to the matched filter for resampling operation, the optimal resampling point is continuously adjusted, the symbol synchronization establishment time is greatly shortened, and then frame header synchronization of LINK20 received signals is achieved. The method has the advantages of being easy to implement, low in complexity and high in real-time performance and synchronization precision.

The invention discloses a symbol synchronization and frequency offset estimation method and system for a quantum noise stream encryption system, and the method comprises the steps: generating a conjugate symmetric sequence U based on a PN sequence, and generating a conjugate antisymmetric training sequence based on U; a sending end encrypts a training sequence by adopting a pre-shared key, the encrypted training sequence is added into a data frame, a receiving end receives a data signal comprising the encrypted training sequence, and sequence signals in training sequence positions corresponding to different data positions are recovered based on the key; calculating an autocorrelation value and a timing metric value of the corresponding recovered sequence based on different strategies; and averaging the timing metric values of different strategies to obtain a comprehensive timing metric value, performing symbol synchronization of the quantum noise stream encryption system based on the comprehensive timing metric value, and performing frequency offset estimation based on an autocorrelation value of a symbol synchronization position. The symbol synchronization accuracy and the frequency offset estimation precision in the quantum noise stream encryption system can be improved, and the safety of symbol frequency synchronization is improved.

The present invention discloses a detection and synchronization method and system for M110-39T based on signal time-frequency characteristics, belonging to the field of short-wave communication technology. It includes: using a frequency-domain peak template to perform a sliding search on the signal to complete signal presence detection and carrier synchronization, where the frequency-domain peak template is constructed comprehensively based on the first-stage pre-synchronization code and Doppler tone of the M110-39T signal; using a time-domain phase template to perform a sliding search on the signal to complete signal coarse timing synchronization, where the time-domain phase template is constructed based on the second-stage pre-synchronization code of the M110-39T signal; adopting a cyclic prefix sliding correlation method to perform symbol synchronization on the data segment of the M110-39T signal. The present invention effectively utilizes various time-domain and frequency-domain characteristics to capture the pre-synchronization code, realizes accurate detection and synchronization of M110-39T in a short-wave time-varying channel, provides input parameters for signal demodulation, can adapt to the fading and changeable short-wave channel, and can cope with the scenario of large frequency offset, and has good robustness and practicability.

A method for synchronizing a data frame and data symbols in a communication system includes generating a training sequence including a serial sequence of data symbols that are conjugate symmetric, inserting the training sequence in a transmitter-side data frame, converting constituent data symbols of the transmitter-side data frame to communication signals, transmitting the communication signals from a transmitter to a receiver, converting the communication signals to a stream of received data symbols, detecting presence of the training sequence in the stream of received data symbols, and identifying a position of a received data frame from the presence of the training sequence.

Methods, systems, and devices for a wakeup receiver operation is described. A receiver may include a conversion circuit that converts an RF signal to a baseband signal, where the baseband signal comprise a set of symbols received at a symbol rate. The receiver may include an analog-to-digital converter that converts the baseband signal to samples at a sample rate greater than the symbol rate. The receiver may include a set of correlators, each correlator of the set may receive a respective subset of the samples of the baseband signal and generate a respective output. The receiver may include a compare circuit that receives the respective outputs from the set of correlators and compares the respective outputs with a threshold, where the compare circuit also generates a wakeup command based at least in part on at least one output of the respective outputs satisfying the threshold.

The invention discloses a front-feedback combined burst signal fast symbol synchronization method, which relates to the technical field of digital signal processing and satellite communication, and comprises the following steps: firstly, sampling a received signal subjected to matched filtering processing according to a 4-time symbol rate by using an initial NCO (Network Controlled Oscillator), then dividing a sampling value into two paths, sending one path to an FIFO (First In First Out) register for caching, and using Oamp in the other path; the method comprises the following steps of: firstly, performing timing deviation estimation by using an FIFO (First In First Out) register and an M algorithm, secondly, determining a moment when the FIFO register starts to read data, an oscillation initial value of an interpolation control NCO and an initial value of an interpolation coefficient according to a timing deviation estimation result, starting the interpolation control NCO, and then, sending the data read by the FIFO register into a Farrow structure interpolation filter for interpolation processing according to the initial value of the interpolation coefficient. And finally, a Gardner loop is started, feedback control is carried out on the interpolation control NCO, and an interpolation result is output, so that the fast symbol synchronization speed and precision of the burst signal are improved, and the stability and timeliness of fast symbol synchronization of the burst signal are guaranteed.

This application provides a method, apparatus, and storage medium for vehicle-to-everything (V2X) symbol synchronization, relating to the field of communication technology. It addresses the problem of poor reliability and accuracy of traditional symbol synchronization algorithms in high-frequency bias and low signal-to-noise ratio (SNR) LTE-V2X practical communication scenarios. The method includes: performing coarse synchronization processing on the received baseband V2X signal and local synchronization signal to obtain a coarse synchronization point; calculating a frequency offset estimate based on the local synchronization signal and the coarsely synchronized baseband V2X signal, and using the frequency offset estimate to compensate the local synchronization signal; based on the coarse synchronization point, extracting the unsampled baseband V2X signal from the received baseband V2X signal; and performing fine synchronization processing on the unsampled baseband V2X signal and the frequency offset-compensated local synchronization signal to obtain a fine synchronization point. The embodiments of this application are used in the process of V2X symbol synchronization.

The invention discloses a service-adaptive satellite-borne non-uniform multicarrier demodulation device, and belongs to the field of digital signal processing. The method comprises the following steps of: firstly, performing orthogonal down-conversion and resampling filtering processing on a digital intermediate frequency signal sampled by an ADC (Analog to Digital Converter), processing the digital intermediate frequency signal by a non-uniform channelization splitter, and then serially outputting the digital intermediate frequency signal to a spread spectrum ratio self-adaptive variable burst capturer according to fixed quadruple sampling to capture a leading head and identify the spread spectrum ratio; the method comprises the following steps: completing symbol synchronization and de-spreading processing on an input signal according to a spread spectrum ratio, then completing carrier coarse synchronization and pattern word identification, completing modulation mode identification and carrier synchronization according to a pattern word, performing channel decoding through a multi-mode decoder to recover to an information bit stream, and outputting the information bit stream. And the information bit stream is sent to a service frame recombination processor for search identification and recombination splicing, and output is carried out after whole-frame CRC check is carried out. The method has the advantages of flexibility in use, low resource occupation and capability of realizing adaptive demodulation of variable-rate, multi-modulation-mode and multi-coding-mode service transmission signals without parameter configuration.

The invention relates to the technical field of data transmission, and discloses a method and system for realizing U disk data transmission based on UWB communication, and the method comprises the steps: firstly obtaining equipment characteristic parameters corresponding to a target U disk, recognizing a UWB hardware identification code to determine a communication spectrum range, and dividing a wireless channel environment in combination with a scanning protocol to obtain an accessible frequency band; detecting interference intensity of each frequency band, and analyzing pulse fluctuation characteristics, a transmission error code threshold value and data retransmission times; determining a data attenuation threshold, analyzing a transmission time delay component and calculating a balance compensation index; determining a symbol synchronization path according to the index, and checking the phase deviation tolerance to determine the data transfer state; and finally, based on the state, checking file writing characteristics, and through anti-interference adjustment and time slot optimization, generating a UWB communication data transmission scheme. According to the invention, the USB flash disk data transmission distance, speed and scene adaptability can be improved.

The invention discloses an OFDM (Orthogonal Frequency Division Multiplexing) communication method, device and system, and the method comprises the steps: generating a transmission frame which comprises a plurality of OFDM symbols; a first OFDM symbol of the transmission frame is a synchronous pilot symbol, and a second OFDM symbol is a reference pilot symbol; based on the transmission frame, configuring at least two demodulation modes according to channel conditions or communication requirements; when the first demodulation mode is configured, the receiving end performs differential phase shift keying differential demodulation on subsequent data symbols based on the reference pilot symbols; and when a second demodulation mode is configured, the receiving end performs channel estimation by using the reference pilot symbol, and performs quadrature amplitude modulation equalization and demodulation on subsequent data symbols according to a channel estimation result. According to the invention, ultralow pilot frequency overhead can be realized, the pilot frequency overhead is compressed to only two symbols, a synchronization sequence and a reference pilot frequency sequence in each frame, and the frequency spectrum utilization rate is greatly improved.

The invention provides a communication method and device, belongs to the technical field of communication, and is used for enabling a synchronization signal to meet higher detection requirements of the synchronization signal in the future. In the method, the phase modulation code is determined through the barker code, and the phase modulation code is used for performing phase modulation on the time domain basic sequence, so that the synchronization signal has better delimiting capability, namely symbol synchronization capability, that is, the terminal node can more accurately determine the starting position of the symbol, the performance of detecting the first synchronization signal by the terminal node can be improved, and the user experience is improved. Therefore, the terminal node can accurately detect the synchronization signal. In addition, the time domain basic sequence comprises multiple segments of same elements, and frequency synchronization can be facilitated. Therefore, the synchronizing signal can meet higher synchronizing requirements in the future.

The invention relates to a device and a transmission system for synchronizing symbol clocks during data transmission between a sender and a receiver, the device having an estimation means (30) and a symbol synchronizer (40). An estimation unit (30) receives a first signal (S1) generated by a sender (10) and estimates a phase deviation (POFF) and / or a frequency deviation (FOFF) between a symbol clock of the sender (10) and a symbol clock of a receiver (20) on the basis of the first signal, generates the first signal (S1) on the basis of the symbol clock of the sender, and analyzes and evaluates the first signal in the receiver on the basis of the symbol clock of the receiver. The device (5) initializes the symbol synchronizer (40) on the basis of the evaluated phase deviation (POFF) and / or the evaluated frequency deviation (FOFF). The symbol synchronizer (40) receives a second signal (S2) generated by the sender (10) in order to generate, on the basis of the second signal (S2), an output signal (SO) representing symbols transmitted inside the second signal (S2) synchronized with the symbol clock of the receiver (20).

The invention provides a ZC sequence-based OFDM (Orthogonal Frequency Division Multiplexing) system synchronization method, which comprises the following steps of: firstly constructing two ZC sequences ZC1 and ZC2 with different roots, then valuing and arranging the ZC1 sequence and the ZC2 sequence to obtain a training sequence, carrying out IFFT (Inverse Fast Fourier Transform) on the training sequence, adding a cyclic prefix to a data frame, then sending the training sequence by a sending end and transmitting the training sequence through a channel, and calculating the cross correlation between the receiving end data and the local training sequence, finally selecting a symbol synchronization position according to a cross correlation calculation value, and after the synchronization position is determined, estimating the carrier frequency offset. According to the scheme of the invention, accurate symbol synchronization and frequency offset estimation can be carried out in a large-fading and low-signal-to-noise-ratio wired channel environment, the synchronization reliability is enhanced, and the operand is reduced.

The embodiment of the invention provides a decoding circuit, a decoding method and a passive internet of things tag, and the circuit comprises a frame synchronization module which is used for transmitting a downlink instruction, an effective frame signal and a symbol feature sequence to a symbol synchronization module; the symbol synchronization module is used for sending the symbol synchronization signal to the symbol decoding module; the convolution result is a convolution output value corresponding to each group of symbol feature sequences; and the symbol decoding module is used for reading convolution output values at two moments at each optimal judgment moment based on the symbol synchronization signal, comparing the convolution output values at the two moments based on a preset comparison rule, generating symbol judgment results, and combining the symbol judgment results to generate effective data. In the mode, effective data can be stably extracted in a complex communication environment, so that the decoding sensitivity and the anti-interference capability of the passive Internet of Things tag in the complex environment are improved, and the decoding precision and the stability of the passive Internet of Things tag are further improved.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a one-symbol primary synchronization signal (PSS) over a set of tones in a frequency domain. The UE may monitor for a three-symbol synchronization signal block (SSB) based at least in part on whether a group of resource blocks (RBs) includes at least one of an SSB identifier associated with the three-symbol SSB or offset information. Numerous other aspects are described.

The embodiment of the invention provides a symbol synchronization method, a symbol synchronization device, computer equipment and a computer storage medium, and relates to the technical field of computers. The method comprises the following steps: acquiring a to-be-processed signal, and performing segmentation processing on the to-be-processed signal to obtain a plurality of to-be-processed sub-signals; for each target to-be-processed sub-signal in the plurality of to-be-processed sub-signals, performing conjugate product on the data difference of the adjacent sampling points corresponding to the current sampling point and the target data corresponding to the current sampling point to obtain a clock error corresponding to the target to-be-processed sub-signal; error correction is carried out on the clock error, and the sampling clock deviation of the target to-be-processed sub-signal is determined based on the corrected clock error value; and performing interpolation filtering operation on the target to-be-processed sub-signal based on the sampling clock deviation to obtain a target signal after symbol synchronization of each to-be-processed sub-signal. According to the method, the symbol synchronization performance can be improved while the algorithm complexity is reduced.

The invention relates to the technical field of signal transmission, and particularly discloses a wireless temperature and humidity sensing method and system for an industrial site, and the method comprises the steps: achieving the dynamic generation of a frequency hopping sequence driven by a single-frame snapshot through building a millisecond-level disturbance feature sensing channel; a frequency point stability weighting factor is constructed in combination with judgment reliability feedback, so that frequency point selection gives consideration to an instantaneous state and historical performance; a frequency point marking preamble extension section and cross-frame trend tracking are further introduced, so that the synchronization efficiency of a receiving end is improved, and sequence evolution has inherent continuity; finally, the context is solidified in the node dormancy awakening process, and the availability of the first frame under intermittent communication is guaranteed. Therefore, the destructive effect of broadband electromagnetic pulses on lead code capture and symbol synchronization is effectively suppressed, the first frame data packet loss rate and the CRC verification failure probability are remarkably reduced, and the transmission robustness and the time certainty of temperature and humidity sensing data in a strong interference industrial environment are improved.

The invention discloses a receiving and transmitting device based on negentropy statistics and compressive sensing, and relates to the field of high-speed wireless communication. The device comprises a channel encoder, a modulator, a sparse encoder, a multi-channel transmitter, a multi-channel receiver, a digital preprocessor, an interference eliminator based on negentropy statistics, a signal reconstruction device based on compressive sensing, a symbol synchronizer, a multi-channel demodulator, a channel decoder and the like. According to an interference elimination technology based on negentropy statistics and a nonlinear signal reconstruction technology based on compressive sensing, under the condition that the complexity of the system is not increased, the multi-path high-speed parallel transmission capacity of the system is improved, high-speed reliable transmission is guaranteed, the anti-interference capacity of the system is improved, and the reliability of the system is improved. The antenna is especially suitable for high-speed wireless communication scenes such as microwave communication, mobile communication and scatter communication.

The present invention discloses a symbol synchronization method, device, equipment and medium for caller number recognition. The method includes: determining the capture sampling point of the caller number recognition signal as the initial symbol synchronization point, and obtaining multiple candidate symbol synchronization points corresponding to the initial symbol synchronization point; obtaining a set of sampling points corresponding to each candidate symbol synchronization point, and obtaining the demodulation result of each candidate symbol synchronization point based on a preset number of sampling points; obtaining the prediction variance of each candidate symbol synchronization point according to the demodulation result, and obtaining the target symbol synchronization point corresponding to the minimum prediction variance. The technical solution of this embodiment can improve the accuracy and robustness of the symbol synchronization of caller number recognition by obtaining multiple candidate symbol synchronization points with the capture sampling point of the caller number recognition signal as the starting point, and calculating the prediction variance corresponding to each candidate symbol synchronization point respectively, and then screening the target symbol synchronization point corresponding to the minimum prediction variance among each candidate symbol synchronization point.