753results about "Carrier regulation" patented technology

The invention discloses a time-frequency synchronization tracking and judging method based on GFSK (Gaussian Frequency Shift Keying). The method comprises the following steps: S1, positioning the initial position of a synchronization word by detecting a lead code; s2, extracting a fixed synchronization word, completing frame synchronization based on correlation matching, and positioning a starting point of an effective data segment; s3, a range cycle counter collects a central sampling point and two adjacent sampling points to form a candidate sampling point sequence; s4, dynamically and finely adjusting the range cycle counter to form a time sequence calibration sampling point sequence; s5, performing phase difference calculation on the time sequence calibration sampling point sequence, estimating continuous frequency offset and generating a compensation value; s6, applying the compensation value to construct a decision feedback equalizer with delay front and back terms; s7, performing interference suppression on the compensation sampling point sequence by using a decision feedback equalizer with delay front and back items, and outputting a soft decision value; and S8, executing three times of judgment, constructing a sliding reference sequence, and outputting a final bit judgment result. According to the method, the problem of poor GFSK demodulation robustness under Doppler disturbance is solved.

The invention relates to a channel estimation method based on frequency domain deviation compensation and dynamic DCT denoising, and belongs to the technical field of wireless communication. The method comprises the following steps: establishing a wireless channel model and an OFDM system model; estimating the frequency offset in the received signal by using the phase rotation characteristic of the pilot signal; calculating a preliminary channel frequency domain response # imgabs2 # at a pilot frequency position through a least square criterion based on the compensation signal # imgabs1 #; obtaining a receiving pilot frequency signal # imgabs4 # according to the sending pilot frequency Xp and the roughly estimated channel frequency response # imgabs3 #; estimating a current signal-to-noise ratio SNRest based on the pilot frequency signal # imgabs5 # and a noise power ratio; and establishing an adaptive DCT denoising strategy based on a signal-to-noise ratio threshold, and selecting different denoising strategies according to different signal-to-noise ratios to perform denoising processing on # imgabs6 # to obtain final channel estimation # imgabs7 #. The adaptive denoising strategy design of the invention effectively balances the relationship between noise suppression and channel structure fidelity, and improves the precision and stability of overall channel estimation.

The invention relates to the technical field of ecological system service function evaluation. The invention relates to a frequency offset correction algorithm in HPLC (High Performance Liquid Chromatography) + HRF (High Radio Frequency) dual-mode communication. The method comprises the following steps: S1, collecting phase sequence data from an HPLC communication link, collecting frequency offset estimation data and corresponding confidence data from an HRF communication link, and adaptively adjusting a preset detection threshold value of the phase sequence data according to the confidence data; s2, performing pulse abnormal sample point detection and elimination on the phase sequence data according to the adjusted preset detection threshold value; according to the method, the detection threshold is dynamically adjusted through the confidence data, so that the anomaly detection process can be matched with the current interference environment in real time, the integrity of the phase sequence data is maintained, and the problem of insufficient adaptability of a fixed detection threshold in an electromagnetic interference dynamic change scene is solved; and a more reliable phase data basis is provided for subsequent interpolation compensation and frequency offset estimation, so that the frequency offset correction precision of the dual-mode communication system is improved.

The invention relates to the technical field of signal processing, in particular to an intelligent blind equalization method and device for large-scale carrier frequency deviation, and the method comprises the steps: carrying out the down-conversion of an original received signal of a preset modulation type, so as to sample an original complex sampling point sequence with large-scale carrier frequency deviation; performing local information exchange, parameter correction and splicing on the original complex sampling point sequence to obtain a compensated complex sampling point sequence; performing pre-extraction and channel amplification on the compensated complex sampling point sequence to obtain pre-extraction features containing implicit channel state information, and further extracting spatial information and time sequence dependence in the pre-extraction features to balance multipath fading of the original complex sampling point sequence and obtain balanced output; and demodulating the original bit information of the original complex sampling point sequence according to the balanced output. Therefore, the problem that a blind equalization method in the related technology cannot effectively adapt to a time-varying multipath channel and a scene with large-scale carrier frequency deviation is solved.

The invention discloses a satellite signal distortion compensation and data reconstruction method, system and device and a medium, and belongs to the technical field of satellite communication, and the method comprises the steps: obtaining and processing a satellite communication time domain signal, obtaining a time-frequency graph and a local feature vector, calculating the local feature vector through an encoder, obtaining a global feature, and carrying out the calculation of the global feature; splicing the global feature and the local feature vector to generate a fusion feature vector, and recovering the resolution of the time-frequency graph based on an end-to-end compensation network; and inputting a time-frequency graph and the fusion feature vector to obtain a phase compensation factor, compensating the time-frequency graph by using the phase compensation factor, reconstructing a time-domain signal through inverse short-time Fourier transform, splicing the fusion feature vector and a combined data type label, and inputting the spliced fusion feature vector and combined data type label into a trained neural network to realize semantic reconstruction. The method solves the problem of joint compensation of signal amplitude and phase, guarantees data integrity, gets rid of dependence on complex physical parameter estimation, and can quickly adapt to ionosphere change and multipath effect environment.

The embodiment of the invention provides a time-space synchronization method and device, electronic equipment and a medium, which are used for solving the problem of inaccuracy of a local clock in related technologies. In the embodiment of the invention, the electronic equipment combines the average deviation pseudo-range, the RTT jitter and the target frequency offset into the multi-dimensional observation vector, so that the error source of clock synchronization is fully covered. The time deviation and the frequency deviation of the clock are accurately and effectively determined through a Kalman filtering algorithm, recursive processing of observation vectors and dynamic estimation of the time deviation and the frequency deviation of the clock, and high-precision synchronization of the local clock in a complex environment is achieved in combination with the optimization capability of the Kalman filtering algorithm. And the time of the local clock is the time determined according to the time of the multiple clocks, so that the clocks are more accurate.

The invention discloses an HRF signal synchronization method, device and system of a dual-mode carrier communication system, and belongs to the technical field of power line carrier communication. The method comprises the following steps: dividing a frequency offset range into a plurality of frequency offset hypothesis intervals based on an allowable maximum residual frequency offset range; performing frequency offset pre-compensation on the received signal according to each frequency offset hypothesis interval to obtain multiple paths of frequency offset compensation signals, and performing cross-correlation processing on the multiple paths of frequency offset compensation signals and a local reference sequence to obtain multiple paths of cross-correlation value sequences; in any cross-correlation value sequence, performing self-correlation processing on cross-correlation values of adjacent symbol intervals to obtain a corresponding self-correlation sequence; correlation peak values corresponding to the frequency offset hypotheses are extracted from the multiple paths of self-correlation sequences respectively, the maximum correlation peak value is determined from the correlation peak values, and if the maximum correlation peak value is larger than a synchronization judgment threshold value, the corresponding position is determined to be the synchronization position. According to the invention, high-precision wireless signal synchronization is realized, and high-quality signal transmission is ensured.

A method and apparatus are described for synchronization between Bluetooth audio transmitters. In one example, an audio source includes a synchronization bus. A first audio transmitter is coupled to the audio source and to the synchronization bus. The first audio transmitter is configured to assess available radio channels, select a set of radio channels, send transmit commands to a second audio transmitter through the synchronization bus, and to transmit a first set of audio streams from the audio source to a first set of one or more audio sinks using the selected radio channels. The second audio transmitter is configured to receive the transmit commands from the first audio transmitter through the synchronization bus and to transmit a second set of audio streams from the audio source to a second set of one or more audio sinks in accordance with the transmit commands.

Systems, apparatuses, methods, and computer products for fast wakeup recovery for narrow-band internet of things (NBIOT) systems are provided. The fast wakeup recovery may wakeup a NBIOT device from a sleep mode to an active mode. The fast wakeup recovery may identify a servicing cell for the NBIOT device to synchronize with. The fast wakeup recovery may be based on a coarse timing detection operation using a NPSS and a fine timing detection operation using a NSSS.

The invention provides a fine timing method and apparatus, an electronic device, a storage medium and a chip. The method comprises the steps of determining residual frequency offset of a first target frequency point and a second target frequency point in a detection sequence; wherein the first target frequency point and the second target frequency point are determined when the detection sequence is converted into a frequency spectrum; determining adjustment amounts of a direct current component at the first target frequency point and the second target frequency point according to the residual frequency offset; respectively determining phases of the first target frequency point and the second target frequency point according to the adjustment amounts of the first target frequency point and the second target frequency point; and determining a fine timing adjustment amount according to the phases of the first target frequency point and the second target frequency point. Compared with the prior art, by determining the residual frequency offset, determining the adjustment amount of the first target frequency point and the second target frequency point according to the residual frequency offset, and determining the phase according to the adjustment amount, the fine timing adjustment amount obtained based on the phase is more accurate, and the TOA estimation value is more accurate.

The invention provides a frequency offset estimation method and device for a digital subcarrier coherent optical communication system, and relates to the technical field of communication. According to the method, when frequency offset estimation is carried out on a received digital subcarrier signal, empirical mode decomposition is carried out on the signal, namely, an eigenmode function derived by a noisy signal is used for carrying out frequency offset estimation on the signal; decomposing the signal into a plurality of eigenmode components and residual components; using different numbers of eigenmode components to reconstruct a plurality of signals with the residual components; through quartile outlier detection and clustering analysis, a reconstruction signal which most meets the requirement is selected in a self-adaptive mode to serve as a final reconstruction result; and finding out the frequency position of a specified point from the reconstructed signal to carry out frequency offset estimation. According to the method, blind frequency offset estimation in a PDM-16 / 64QAM DSCM system can be accurately and stably realized within a certain error allowable range, and the method has the advantages of being small in error, applicable to different roll-off factors, capable of processing large frequency offset and the like.

The present invention discloses a hierarchical synchronous reception method for weak spread spectrum signals. Based on the long coherent accumulation mechanism, the method utilizes the difference in sensitivity of different spread spectrum code lengths to frequency deviation, and realizes efficient synchronous reception of signals by hierarchically capturing the code phase and compensating for the frequency deviation in steps. Compared with the traditional two-dimensional joint search (code phase and frequency) method, the present invention optimizes the search process into a one-dimensional search, avoiding the exhaustive search in the frequency dimension, thereby significantly reducing the computational complexity and improving the processing efficiency. The present invention adopts a strategy of capturing the code phase step by step, combined with a coarse estimation and fine estimation scheme of the frequency deviation, to ensure high capture sensitivity and synchronization accuracy. Especially in low signal-to-noise ratio environments and complex channel conditions, the present invention can effectively improve the reception reliability of spread spectrum signals. The method and system have the advantages of low computational complexity, simple hardware implementation, and strong adaptability, and provide an innovative solution for the reception and processing of weak spread spectrum signals.

The embodiment of the invention discloses a broadband signal simulation method and system influenced by Doppler frequency in satellite communication. The method comprises the following steps: sampling a received original broadband signal according to an original sampling rate, and obtaining a signal value of a sampling point in real time; discretizing the sampling time of the original broadband signal at the original sampling rate and after the original broadband signal is influenced by the Doppler effect to obtain a first discrete time value and a second discrete time value; storing the signal value and the first time value in a plurality of filter banks in parallel; based on the second time value and the first time value, triggering the filter bank to perform interpolation operation on the stored signal value to obtain a signal interpolation; and performing frequency modulation on the original broadband signal based on the carrier frequency, the relative speed and the output signal interpolation to form a target signal. According to the method, the signal conversion process can be simulated through the simulation technology, the low-cost performance test requirement of the satellite communication system is met, and meanwhile processing time and resource consumption are reduced according to the multiple filter banks.

A modem is configurable on a satellite, user terminal or gateway generates a radio frequency (RF) signal using an orthogonal frequency division multiplexing (OFDM) protocol including a radio frame including one or more bursts. A burst of the one or more bursts includes a first portion including burst detection data, a second portion including channel characteristic estimation data, a third portion including payload data, and fourth and fifth portions including pilot data. The first portion in a time domain is included in the burst prior to the second, third, fourth, and fifth portions. The first portion can include a pseudo-random noise sequence inserted in the time domain. The same physical modem can be configured to transmit signals on an uplink or downlink between a user terminal and a satellite or on the uplink or downlink between the satellite and the gateway.

The invention belongs to the technical field of underwater acoustic communication signal demodulation, and particularly relates to an underwater acoustic communication signal demodulation method based on an enhanced double-branch convolutional neural network. Processing a received signal into a data set consisting of signal segments and corresponding labels, and taking the data set as an input signal; the enhanced double-branch convolutional neural network respectively extracts key features of the input signal in a time domain and a frequency domain, and outputs a time domain feature and a frequency domain feature; and fusing the time domain feature and the frequency domain feature to generate a fused feature, carrying out nonlinear transformation and feature mapping on the fused feature, and then outputting a category probability through a Softmax function to obtain a classification result. Compared with a traditional single time domain or frequency domain processing method, key features of the signals are extracted in the time domain and the frequency domain through the time domain branch model and the frequency domain branch model respectively, deep fusion of the key features is achieved through a cross attention mechanism, and therefore time-frequency complementary information is fully mined; the demodulation accuracy of the digital modulation signal can be effectively improved.

The invention provides a method for correcting phases of an inner ring and an outer ring after power amplification and related equipment, and relates to the technical field of multi-path complex channels. And dividing the multipath complex signal into an inner ring and an outer ring. And performing exponentiation on the inner ring signal to eliminate the phase of the modulation information, and only remaining the residual phase information at the moment. The accumulation processing can integrate the phase information of a plurality of sampling points, and further highlights the overall phase change trend. In the phase calculation, the processed information is converted into phase data which can be directly analyzed, the phase offset is accurately calculated and corrected based on the phase data obtained in the previous steps by changing the direction and performing the extraction operation, the problems of inconsistent phases of the inner ring and the outer ring and disordered relative positions caused by a power amplifier are solved, and the communication quality and the system performance are 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.

Provided are a communication method and device, relating to the technical field of communications, a network device obtaining a synchronization signal block (SSB), the SSB comprising: a physical broadcast channel (PBCH) signal and a synchronization signal, the PBCH signal being obtained by performing single carrier modulation on a physical broadcast channel (PBCH), and the synchronization signal being obtained by performing single carrier modulation on a synchronization sequence; and the network equipment sends the SSB, the terminal receives the SSB, and the terminal demodulates the synchronization signal and the PBCH signal. Since the single carrier modulation can ensure that the signal has a lower peak-to-average power ratio (PAPR), in the application, the PBCH signal and the synchronization signal in the SSB both adopt single carrier modulation, and the SSB can be ensured to have a lower PAPR.

The invention relates to the technical field of wireless communication, and provides a large frequency offset estimation method based on time-frequency domain combination under an OFDM (Orthogonal Frequency Division Multiplexing) system, which comprises the following steps of: performing IFFT (Inverse Fast Fourier Transform) on an original frequency domain signal under an OFDM symbol where a DMRS (Demodulation Reference Signal) is located to a time domain to obtain a first time domain signal; performing inter-symbol signal conjugate correlation processing on the first time domain signal to obtain a correlation value; performing Alpha filtering on the correlation value to obtain a filtered correlation value; performing phase calculation and conversion processing on the filtered correlation value to obtain a coarse frequency offset value; and finally, performing frequency offset estimation under a traditional frequency domain through FFT transformation to the frequency domain to obtain a fine frequency offset value. The method has the beneficial effects that the frequency offset in a subcarrier range is estimated by using the phase difference of the time domain signal under the OFDM symbol where the DMRS is located between the same symbols, and the estimation range is obviously far larger than that of the existing frequency offset estimation scheme.

The invention discloses a Doppler frequency offset estimation method and electronic equipment, and relates to the technical field of communication, and the method comprises the step that the electronic equipment communicates with a low-orbit satellite in a discontinuous reception (DRX) mode. Wherein in a discontinuous reception (DRX) mode, the electronic equipment enters a wake-up period when the wake-up moment arrives, the electronic equipment communicates with a low-orbit satellite in the wake-up period, the electronic equipment enters a sleep period when the sleep moment arrives, and the electronic equipment stops communicating with the low-orbit satellite in the sleep period. When the wake-up moment arrives, the electronic device obtains at least one historical Doppler frequency offset value; and the electronic equipment determines a Doppler frequency offset value corresponding to the wake-up moment based on the historical Doppler frequency offset value. In the scheme, the Doppler frequency offset value at the wake-up moment is estimated through the historical Doppler frequency offset value, and the electronic equipment can calculate the Doppler frequency offset value at the current wake-up moment, so that frequency offset compensation can be carried out in time at the current wake-up moment, and the performance of frequency offset compensation is optimized.

The invention relates to the technical field of audio equipment testing, and discloses a parallel burning and Bluetooth testing frequency calibration method of a special chip for audio equipment. The method comprises the following steps of: establishing an independent serial communication channel with a plurality of chip chips through a computer control unit, and synchronously transmitting a firmware data packet to each chip storage unit; the high-precision radio frequency detection device is started to scan Bluetooth signal frequency offset values of all chips, and detection data is fed back to the computer control unit in real time; screening unqualified chips according to a preset frequency offset threshold, starting a dynamic frequency calibration program for the unqualified chips, and modifying internal capacitance parameters of the chips through a serial communication channel; repeatedly executing the frequency offset detection and capacitance parameter adjustment step until the frequency offset values of all the chips reach a standard range; and after completing the frequency offset calibration, executing a multi-channel Bluetooth performance test and outputting a test result report. According to the method, the chip firmware burning and Bluetooth test frequency calibration efficiency can be improved, the chip performance is guaranteed, and the method is adaptive to the batch production requirement.

A method of operating infrastructure equipment of a wireless communications network is provided. The method comprises transmitting, to a first communications device, an indication of time and frequency resources assigned for the first communications device to transmit a first uplink transmission as a first set of uplink repetitions to the infrastructure equipment. The first set of uplink repetitions comprises a first subset of the first set of uplink repetitions and a second subset of the first set of uplink repetitions. The method comprises transmitting, to the first communications device, an indication of an assigned Orthogonal Cover Code (OCC) for the first communications device to apply to the first set of uplink repetitions. The time and frequency resources for the first communications device to transmit the first uplink transmission, and the OCC for the first communications device to apply to the first set of uplink repetitions, are assigned such that the first communications device belongs to a first OCC group for transmitting the first subset of the first set of uplink repetitions and belongs to a second OCC group for transmitting the second subset of the first set of uplink repetitions. The first OCC group and the second OCC group comprise at least one other communications device. The at least one other communications device in the first OCC group is different from the at least one other communications device in the second OCC group.

The invention relates to the technical field of green communication, and discloses a visible light communication system and method based on CDMA (Code Division Multiple Access), the system comprises a transmitting end module, a visible light channel module, a receiving end module and a dynamic optimization module, by combining a CDMA multiple access technology and OFDM (Orthogonal Frequency Division Multiplexing) modulation, multi-user efficient access and spectrum resource dynamic allocation are realized, and the visible light communication efficiency is improved. User data streams are distinguished based on orthogonal spreading codes, and multi-user interference is effectively suppressed; through an OFDM subcarrier mapping and self-adaptive power allocation algorithm, the subcarrier transmitting power is optimized, the spectrum utilization rate is improved, the problem of resource allocation rigidness in a traditional TDMA / FDMA technology is solved, the communication capacity and the data transmission efficiency in a multi-user scene are remarkably improved, and by measuring the signal-to-noise ratio and the path loss of a channel in real time, the transmission efficiency of the multi-user scene is improved. And the spreading code length and the OFDM modulation order are dynamically adjusted, and signal attenuation and distortion caused by complex illumination conditions and a multipath effect are reduced.

Certain aspects of the present disclosure provide techniques for generating and processing a frequency multiplexed continuous wave (FMCW) based synchronization signal (SS). According to certain aspects, a method for wireless communication at a wireless node, comprising obtaining a synchronization signal comprising a first frequency modulated continuous waveform signal associated with a frequency that increases in time for a duration according to a first slope and a second FMCW signal that overlaps with the first FMCW signal, wherein the second FMCW signal is associated with a frequency that decreases in time for the duration according to a second slope that corresponds to a negative of the first slope; and performing frequency offset estimation based on the first and second FMCW signals.

Methods and systems for NN-based digital pre-distortion for digital envelope tracking power amplifiers. A computer-implemented method includes receiving a measure of a digital envelope at a digital pre-distortion module having a neural network (NN)-based digital pre-distortion structure for digital envelope tracking (DET), receiving a transmit signal at the digital pre-distortion module, inputting the measure of the digital envelope and the transmit signal into the NN-based digital pre-distortion structure to produce a pre-distorted transmit signal, adjusting nonlinearity compensation of a power amplifier based on the measure of the digital envelope, and using the adjusted nonlinearity compensation of the power amplifier to produce an output signal.

The invention discloses a multi-node concurrent transmission signal superposition diversity method. The method comprises the following steps: S1, generating a Turbo coding sequence by adopting a Turbo encoder; s2, applying phase disturbance to each Turbo coding sequence; s3, performing non-orthogonal superposition in an air channel to form a complex baseband signal; s4, constructing an equivalent observation model; s5, modeling the sending symbol matrix into a sparse matrix to obtain a symbol estimation matrix; s6, inputting the symbol estimation matrix into a Turbo decoder, executing iterative decoding by adopting an improved Max-Log-MAP algorithm, and outputting a bit estimation sequence; s7, completing initial phase estimation by using a Zadoff-Chu lead code, and outputting an estimated phase sequence through a Kalman filter; and S8, dynamically updating the equivalent observation model based on the estimated phase sequence, and completing parallel computing and scheduling. According to the method, Turbo coding, sparse reconstruction and phase disturbance modeling are fused, and multi-node non-orthogonal concurrent transmission is achieved.

Disclosed in embodiments of the present disclosure are a method for determining multi-carrier frequency carrier phase positioning capability and an apparatus. The method comprises: a terminal device sends positioning capability information to a network side device, wherein the positioning capability information is used for indicating capability information of multi-carrier frequency positioning signal transmission (S21). The terminal device is supported to report the positioning capability information, so as to improve the flexibility of the terminal device and improve the accuracy of positioning measurement.

A communication frame for an OTFS transmission system includes at least one first-type and at least one second-type block. At least the first-type block includes data signals two-dimensionally arranged along the delay domain and the Doppler domain of which at least one has a superimposed pilot signal. The second-type block includes data signals two-dimensionally arranged along the delay domain and the Doppler domain which may or may not have superimposed pilot signals. At least one second-type block is preceded and followed, in the delay-domain, by first-type blocks, the first-type blocks preceding and following a second-type block having at least one identical data symbol and associated superimposed identical pilot symbol at an identical location in the two-dimensional arrangement. An OTFS transmitter generates and transmits the communication frame, and a receiver uses its properties for compensating oscillator frequency offset and channel estimation.

The invention relates to the technical field of signal processing, and discloses a velocity vector sensing method and device, equipment, a storage medium and a product, and the method comprises the steps: carrying out the down-conversion and matched filtering of a pilot signal transmitted by a user side, obtaining a target discrete signal sequence, carrying out the fast Fourier transform of the target discrete signal sequence, and obtaining a target discrete signal sequence; and determining a signal frequency sequence based on a discrete Fourier transform result, determining a frequency increase rate and a Doppler offset according to the signal frequency sequence, obtaining a signal propagation delay according to the discrete Fourier transform result, and further determining a velocity vector sensing result of the user side. According to the invention, hardware complexity and power consumption are reduced through down-conversion and matched filtering processing, and the signal-to-noise ratio is improved; according to the method, fast Fourier transform and inverse fast Fourier transform are combined, a signal frequency sequence, signal propagation time delay, frequency increase rate and Doppler offset are extracted, the velocity vector of a user side is sensed comprehensively, and the limitation that only part of parameters can be sensed in the prior art is overcome.

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.