147 results about "Constellation diagram" patented technology

The invention discloses a three-dimensional 16QAM constellation diagram based on geometric shaping and a digital communication method, and relates to the field of communication, in a three-dimensional space, 16 constellation points are distributed on the surface of a three-dimensional sphere with the radius of 2.5, and 8 constellation points are distributed on each of the upper hemispherical surface and the lower hemispherical surface; a regular pentagon parallel to the XOY plane is formed by five constellation points in the upper hemispherical surface, the center of the regular pentagon coincides with the projection of the sphere center on the XOY plane, and one edge of the regular pentagon is parallel to the XOZ plane; the other three constellation points form an equilateral triangle parallel to the XOY plane, the center of the equilateral triangle coincides with the projection of the sphere center on the XOY plane, and the vertical bisector of one edge of the equilateral triangle is parallel to the YOZ plane; and rotating the eight constellation points of the upper semi-spherical surface by 180 degrees along the center of the sphere in the direction parallel to the YOZ plane to obtain the distribution of the constellation points of the lower semi-spherical surface. According to the method, the channel noise tolerance and the overall transmission performance of the system are improved, the bit error rate is reduced, and the method has an important application prospect in a high-tolerance and high-performance transmission system.

The invention provides a communication radiation source individual identification method based on time domain and time sequence coding constellation diagram feature fusion. The method is used for realizing stable identification of different transmitters under non-ideal conditions of carrier frequency offset, noise interference and the like. The method comprises the following steps: firstly, carrying out normalization and fixed-length interception on a received I / Q signal, and calculating an oversampling multiple according to a symbol rate and a time resolution; then, a time domain and time sequence coding constellation diagram double-branch feature extraction network is constructed, a time domain structure feature is extracted from a time domain branch by adopting a one-dimensional modified ResNet18, and a constellation diagram with time information is generated from a time sequence coding constellation diagram branch through a time sequence coding constellation module and the feature that the phase changes along with time is extracted; and carrying out joint modeling on the two types of features through a trainable weighted fusion mechanism. In the training stage, the performance of the model is improved by adopting cross entropy loss, an Adam optimizer, learning rate scheduling and an early stop strategy. In the reasoning process, input signals are classified by using the model weight with the highest verification accuracy, and a communication radiation source individual identification result is output. Experimental results show that the method can effectively enhance the frequency offset robustness and generalization ability of the model, realizes high-precision identification of the individual communication radiation source, and is suitable for the fields of security access of the Internet of Things, spectrum monitoring, electronic countermeasures and the like.

The invention relates to a task-oriented semantic communication-oriented adaptive source channel coding system, which belongs to the field of wireless communication, and comprises a sending end for extracting a semantic feature map for evaluation from input data through a feature extractor initialized based on a pre-training large model, executing nested quantization and arithmetic coding based on a calculated importance score, and sending the semantic feature map to a task-oriented semantic communication-oriented adaptive source channel coding system; generating a scalable semantic bit stream with importance levels; the physical layer is used for carrying out reordering and grouping according to importance levels of bit streams, a channel encoder is combined with an interleaver to realize unequal error protection of semantic matching, and encoded bits are mapped to sign bits with different fault-tolerant capabilities in a constellation diagram through division modulation; and a receiving end: recovering the semantic feature map through arithmetic decoding and nested inverse quantization. According to the invention, on the premise of keeping compatibility with a digital communication protocol stack, through distortion-driven joint rate self-adaption, the transmission effectiveness for machine tasks and human vision is obviously improved under a limited bandwidth.

The invention provides a signal-to-noise ratio estimation method and device suitable for PSK (Phase Shift Keying) modulation. The method comprises the following steps: calculating the average power of an input signal sequence; estimating the average power of the pilot frequency sequence; and calculating a signal-to-noise ratio. According to the method, the influence degree of noise on the distance between the PSK modulation signal and the original point in the constellation diagram is estimated, a traditional method for calculating the signal-to-noise ratio by estimating the deviation degree of the actual signal from the ideal signal due to the influence of noise is replaced, high accuracy can still be kept when the signal is influenced by Doppler frequency deviation and sampling deviation, the method is more suitable for an actual communication system, and compared with the prior art, the method has the advantages of simple operation and low cost. In an actual communication system, signal-to-noise ratio estimation is usually carried out after signal timing synchronization and carrier synchronization processing, however, the signal-to-noise ratio calculation method provided by the invention can be used for estimating the signal-to-noise ratio after synchronization before synchronization according to PSK modulation characteristics, and has certain application advantages in scenes such as switching modulation waveforms according to the signal-to-noise ratio.

The present application provides a communication method and a communication apparatus, applicable to a simultaneous wireless information and power transfer scenario. A constellation diagram for an energy transmission frequency domain resource unit is designed, so that modulation symbols on the energy transmission frequency domain resource unit and a data frequency domain resource unit correspond to different constellation diagrams, that is, the data frequency domain resource unit and the energy transmission frequency domain resource unit are modulated by means of different modulation modes, enabling a receiving end device to correctly identify the position of the energy transmission frequency domain resource unit, thereby demodulating correct data.

The invention discloses an SOQPSK demodulation performance monitoring method and system based on upper computer visual feedback. An SOQPSK signal is demodulated by adopting a maximum likelihood sequence detection method based on a Viterbi algorithm; removing the influence of a phase pulse function through matched filtering processing, extracting I / Q data of a fixed sampling point in each symbol period, carrying out time domain superposition, and generating eye pattern data in real time; based on the mapping relation between the grid state variable of the SOQPSK demodulator and the CPM phase state, the maximum survival state in the Viterbi algorithm is used as a phase value, and constellation diagram data is generated in real time in combination with the survival path measurement increment; and packaging the eye diagram data and the constellation diagram data to an upper computer for display, performing performance parameter evaluation and feeding back to a demodulator. The FPGA generates eye diagram and constellation diagram data in real time and sends the eye diagram and constellation diagram data to the upper computer for display and performance evaluation, and visual performance monitoring is provided. And parameters of the demodulator are adjusted in real time, so that a closed loop is integrally formed.

The embodiment of the invention provides a signal transmission method and a communication device, and the method comprises the steps: receiving a data signal and a DMRS, and obtaining a symbol borne by the data signal according to the data signal and the DMRS; according to the method, the power offset proportionality coefficient between the data signal and the DMRS is determined according to the power offset proportionality coefficient, and then the constellation point corresponding to the symbol can be determined according to the power offset proportionality coefficient during demodulation, so that the offset between the coordinate point corresponding to the symbol on the constellation diagram and the constellation point actually corresponding to the symbol in the constellation diagram can be reduced through the power offset proportionality coefficient; therefore, the probability that the symbol is misjudged as other constellation points is reduced, namely the bit error rate in the data signal transmission process is reduced.

The invention provides a communication method and related equipment, relates to the field of communication, and is used for improving the sensing performance in a communication system in a communication and sensing integrated scene. In the method, first equipment sends first information, the first information is used for scheduling a first resource, the first resource comprises N orthogonal frequency division multiplexing (OFDM) symbols on a first time slot, N is a positive integer, and time domain intervals between adjacent OFDM symbols in the N OFDM symbols are first intervals; the first device transmits a sensing signal, the sensing signal is carried in the N OFDM symbols, the sensing signal is modulated according to a first modulation mode, and the amplitudes of different constellation points in a constellation diagram corresponding to the first modulation mode are equal, or the amplitudes of the different constellation points in the constellation diagram corresponding to the first modulation mode are equal; the difference value of the amplitudes of different constellation points in the constellation diagram corresponding to the first modulation mode is smaller than or equal to a first threshold value.

The invention discloses an underwater CSK-OFDM modulation and detection method based on LED linear constraint, and the method comprises the steps: enabling a transmitter to map a data bit stream of a constellation diagram into a complex symbol stream, converting the complex symbol stream into a real number time domain sequence through an ACO-OFDM module, carrying out the LED amplitude limiting of the time domain sequence, and obtaining a time domain clipping sequence; transmitting the time domain clipping sequence in a UOWC channel through a corresponding LED, introducing symbol timing deviation and amplitude limiting noise into a frequency domain by a receiver, and processing the time domain clipping sequence by using an ACO-OFDM module again to obtain a received signal; under the maximum expectation framework, the probability from each alternative constellation diagram is calculated, symbol timing deviation and additive white Gaussian noise variance are estimated, a globally optimal solution is obtained, and a constellation diagram recognition result is output through maximum likelihood demodulation. According to the method, the linear range constraint of the LED and the complex environment under the UOWC scene are comprehensively considered.

The embodiment of the invention provides a digital signal equalization processing method and device, electronic equipment and a readable medium, and the method comprises the steps: judging whether a historical equalization digital signal output when a preset filter carries out the equalization processing of a historical digital signal exists in preset equipment or not; if yes, determining position information of the historical balanced digital signal in a preset constellation diagram according to a preset constellation point position determination strategy; according to the position information of the historical equalization digital signal, determining an error determination strategy for the historical equalization digital signal, and according to the error determination strategy, determining an equalization processing error of the filter on the historical digital signal; adjusting a filter according to the equalization processing error to obtain a target filter; the target filter is used for carrying out equalization processing on the current digital signal to obtain the current equalized digital signal, and the problem of phase ambiguity existing in the current digital signal cannot be aggravated.

The embodiment of the invention provides a communication method and device, a storage medium and a program product, relates to the technical field of communication, and is used for reducing interference between users. The method comprises the following steps: a first node receives capability information sent by a second node, wherein the capability information is used for representing capability supported by the second node; based on the capability information, the first node sends first indication information to the second node, the first indication information is used for indicating a codebook to be used by the second node, the codebook is obtained based on a plurality of user constellation diagrams, and the plurality of user constellation diagrams are obtained by decomposing a superposed constellation diagram.

The invention discloses a low-complexity unequal error protection method based on two-stage cascading, and relates to the technical field of communication. Comprising the following steps: constructing a multi-stage coded modulation system with a two-stage cascade structure; respectively coding the information bits with different importance degrees based on a two-stage cascade structure of the multi-stage coding modulation system to form differentiated coding data streams; designing an optimal constellation diagram through constellation geometric shaping according to the transmission requirements of the differentiated coded data streams after coding; performing constellation mapping on the obtained differentiated coded data stream according to the optimal constellation diagram, and performing signal transmission on the mapped constellation symbols; and after the transmitted constellation symbols are received, decoding processing is performed on the constellation symbols by adopting a multi-stage decoding strategy. According to the method, the decoding complexity is greatly reduced on the premise that the error code performance is not lost.

The invention relates to the technical field of communication security, and particularly provides an encryption method based on a dynamic coupling image lattice, comprising the following steps: S1, acquiring to-be-encrypted constellation diagram data, and taking the constellation diagram data as plaintext data; s2, carrying out DNA coding on the plaintext data, then carrying out arithmetic operation, and then carrying out DNA anti-coding to complete data disturbance encryption; rules of DNA coding, operation and DNA anti-coding are determined through a preset method. The preset method comprises the following steps: S21, acquiring a key sequence, and dividing the key sequence; s22, generating a first intermediate one-dimensional pseudo-random sequence by using a first chaotic mapping model; s23, performing dynamic iteration on the first intermediate one-dimensional pseudo-random sequence by using a one-dimensional coupling mapping lattice model fused by a second chaotic mapping model to obtain a second intermediate one-dimensional pseudo-random sequence; and S24, determining the rules of DNA coding, operation and DNA anti-coding through the second intermediate one-dimensional pseudorandom sequence. The method is high in sequence randomness and high in communication security.

This application discloses an encoding and modulation method, a decoding method, and related equipment, which provides an encoding and modulation method that can adjust the spectral efficiency of the encoding system and achieve better encoding performance. The method of this application includes: the encoding device dividing target bit information into a first bit set and a second bit set; the encoding device generating amplitude bits from the first bit set and phase bits from the second bit set using a distribution matching algorithm; and the encoding device transforming the amplitude bits and phase bits into corresponding four-dimensional symbol information according to a D4Lattice isomorphic constellation diagram.

The invention discloses a radio frequency signal demodulation method and device. The method comprises the following steps: receiving an OFDM (Orthogonal Frequency Division Multiplexing)-based radio frequency signal comprising a plurality of subcarriers, each subcarrier time slot comprising a column of pilot signals; performing conversion processing on the radio frequency signal to obtain a frequency domain signal corresponding to each subcarrier, the frequency domain signal comprising a plurality of OFDM symbols; for each frequency domain signal, primary frequency offset compensation is carried out on each OFDM symbol in the frequency domain signal based on the pilot signal, and for a far-end OFDM symbol whose distance from the position of the pilot signal exceeds a preset distance, secondary frequency offset compensation is carried out on the far-end OFDM symbol based on the distribution state of each constellation point mapped to the constellation diagram; and recovering each frequency domain signal subjected to frequency offset compensation into original bit data. According to the method and the device, the technical problem that the error vector amplitude of a remote symbol demodulation result is relatively large when only a single-column pilot signal is configured in a subcarrier time slot in a traditional demodulation scheme is solved.

A communication method and a communication apparatus are provided. The method includes: a relay node receiving a first signal, the first signal including a first modulation symbol from a first source node and a second modulation symbol from a second source node, wherein the first modulation symbol includes a symbol mapped on a first constellation diagram, the first constellation diagram having multiple constellation points in the same quadrant, and the minimum distance between two adjacent constellation points in the same quadrant being less than 2k, where k is a constellation mapping normalization factor; the second modulation symbol includes a symbol mapped on a second constellation diagram, the second constellation diagram having no more than one constellation point in each quadrant, and the transmission power of the second modulation symbol being determined based on the transmission power of the first modulation symbol; the relay node then forwards the first signal. By reducing the distance between adjacent constellation points in the same quadrant and re-determining the transmission power, the bit error rate of the first signal received by the relay node is improved, thereby greatly reducing the risk of the relay node eavesdropping on information.

The invention discloses a low-complexity signal-to-noise ratio estimation method and device, and relates to the technical field of coherent optical communication, and the method comprises the steps: employing a modulation mode to map a signal to a constellation diagram in a communication link, and extracting a to-be-estimated real number signal from a received signal according to a preset signal-to-noise ratio estimation mode; judging the real number signal to be estimated according to an estimation mode to obtain a positive signal and a negative signal; carrying out addition and subtraction operation on the positive and negative signals respectively and carrying out modulus averaging to obtain a noise modulus value of linear representation; and inputting the noise module value into a preset lookup table, and combining a log value of a known signal module value to obtain a signal-to-noise ratio estimation value based on logarithm representation. According to the method, multiplication is completely removed, the complexity is greatly reduced, iteration is not involved in the table look-up process, so that the complexity is very low, the estimation precision can be freely set according to the size of the table, and the flexibility is high.

A communication method and apparatus, a computer program product, and a readable storage medium, the communication method comprising: acquiring a training sequence sent by N terminal devices, N being a positive integer and N > = 2; determining a reference collision pattern; the reference collision pattern is a constellation diagram corresponding to a collision result on a complex plane, and the collision result is formed by collision of training sequences sent by the N terminal devices. By adopting the scheme, the data in collision can be analyzed, so that the system capacity is improved.

The application discloses a detection synchronization and demodulation design method based on a high-speed burst communication system, comprising the following steps: S1, performing fast acquisition on a burst synchronization sequence in a high-speed QPSK and OQPSK satellite communication system; S2, after the matching flag of the synchronization sequence in S1 is valid, performing M&M frequency offset estimation on current on-the-fly complex signal data and a preset synchronization sequence, generating a corresponding carrier compensation value by using the calculated frequency difference value, and outputting the frequency-compensated on-the-fly complex signal; S3, performing phase estimation on the frequency-compensated on-the-fly signal and the preset synchronization sequence, generating a corresponding phase compensation value by using the calculated phase difference value, and outputting the frequency-phase-compensated on-the-fly signal; and S4, after the frequency-phase compensation is completed, the on-the-fly complex signal is sent into a small-bandwidth synchronization tracking loop to generate a compensation value, a constellation diagram is output, and a symbol hard decision is performed on the loop output to output a synchronization code stream. The application meets the requirements of low bit error rate and missed detection and false detection rate, and provides good demodulation performance.

The invention discloses an information transmission method and device based on label bit delay distribution, which are applied to a sending end, and comprises the following steps: carrying out coding interleaving on an original information bit sequence to generate an interleaved bit sequence, and carrying out rearrangement based on a variable node degree of a protograph to obtain a rearranged bit sequence; constructing a label bit set based on a constellation diagram order, performing reliability sorting according to mutual information of each label bit in the set, dividing the label bit set into a plurality of label bit subsets, and allocating delay time slots; mapping the rearranged bit sequence to tag bits corresponding to the tag bit subsets in a blocking manner, converting the rearranged bit sequence into modulation symbols, modulating the modulation symbols and then performing transmission pretreatment to generate transmission signals, and transmitting the transmission signals to a receiving end through a visible light communication channel; and decoding the transmission signal through a receiving end, generating a decoding bit sequence, and outputting the decoding bit sequence. Therefore, through division of tag bit subsets and bit sequence rearrangement, delay time slot distribution accuracy is guaranteed, and visible light communication transmission reliability is effectively improved.

The present disclosure relates to a data transmission method and device, electronic equipment, chip and medium, wherein the method comprises: transmitting a first message to a second device; the first message comprises first information and padding information; the padding information indicates second information; or the padding information corresponds to a first constellation point in a constellation diagram; the distance between the first constellation point and the center constellation point of the constellation diagram is less than or equal to a distance threshold; wherein in the case that the padding information indicates the second information, the padding of the padding information can transmit additional second information to the second device, and improve the network experience between devices; in the case that the padding information corresponds to the first constellation point in the constellation diagram, the first constellation point is close to the center constellation point of the constellation diagram, and the padding of the padding information can reduce the transmission power of the first message.

This invention relates to a constellation graph geometric shaping method based on an improved GPO algorithm, comprising the following steps: S101, initializing the constellation graph to be shaped under constraints, and mapping the constellation points using an optimized bit mapping method; S102, randomly selecting a constellation point S from the M constellation points of the initialized constellation graph. i ,i∈{1,2,…,M}, and move it slightly in the horizontal or vertical direction; S103, adjust the centroid of the remaining constellation points and scale the constellation points appropriately to satisfy the constraints; S104, find S by selecting the minimum calculated value of the analytical BER formula. i S105. Calculate the new positions of other constellation points; S106. Repeat the above steps until the BER performance improvement reaches saturation; S107. Output the optimized geometrically shaped constellation diagram. Compared with existing technologies, this invention has advantages such as reduced computational complexity and increased transmission capacity.

The invention relates to a satellite-borne multi-carrier broadband dispersion transmitting link system and a digital pre-distortion compensation method. The system comprises a joint predistortion actuator unit, a JESD204 interface module, an RFSoC module, a multi-carrier transmitting channel, a first multiplexer, a second multiplexer, a high-speed data acquisition module, a soft core computing unit, a refreshing and reconstructing unit, a parameter read-write module and a power amplifier working point control and switch selection module. According to the invention, a joint pre-distortion actuator unit is adopted at a transmitting end to eliminate group delay distortion and imbalance influence in a satellite-borne transmitting link. Meanwhile, on the basis of compensating linear distortion, a GMP model is realized at a transmitting end based on a lookup table structure and is used for compensating the strong nonlinearity and memory characteristics of the power amplifier, and the modeling precision of the satellite power amplifier is improved. According to the invention, the vector amplitude error of the constellation diagram can be improved, the design reserved protection bandwidth between adjacent carriers of the last-stage duplexer can be reduced, and the frequency band utilization rate can be improved.

The embodiment of the invention provides a signal processing method and device based on three-dimensional constellation mapping and electronic equipment, and the method comprises the steps: obtaining a binary serial bit stream, and converting the binary serial bit stream into a parallel bit stream; the parallel bit streams are mapped to a multi-layer three-dimensional constellation diagram, three-dimensional constellation points are generated, and the multi-layer three-dimensional constellation diagram comprises a regular polyhedron structure located on the inner layer and a spiral distribution structure located on the outer layer; and generating a complex signal according to the three-dimensional constellation point, the complex signal being used for generating an orthogonal frequency division multiplexing baseband signal. By adopting a mixed structure of an inner-layer regular polyhedron and an outer-layer spiral distribution, the problem of error code performance deterioration under high-order modulation is solved. And due to the spirally distributed energy dispersion characteristic, constellation points are non-uniformly and efficiently utilized in a three-dimensional space, so that the complexity of peak-to-average power ratio suppression is reduced, and the cooperative balance of high-efficiency peak-to-average power ratio suppression and bit error rate optimization is realized.

Embodiments of the present disclosure provide a communication method and apparatus, a storage medium, and a program product. The communication method comprises: a first node receives capability information sent by a second node, wherein the capability information is used for representing a capability supported by the second node; and the first node sends first indication information to the second node on the basis of the capability information, wherein the first indication information is used for indicating a codebook that should be used by the second node, the codebook is obtained on the basis of a plurality of user constellation diagrams, and the plurality of user constellation diagrams are obtained by decomposing a superimposed constellation diagram.

The invention relates to the technical field of data processing, and particularly provides a method, a system, equipment and a medium for restoring an unknown signal constellation diagram, and the method comprises the steps: carrying out the self-correlation calculation of an in-phase I-path component of a received signal, carrying out the spectrum analysis of a self-correlation result, so as to enhance a spectrum component corresponding to a symbol rate, estimating the code element rate of the signal from the frequency spectrum; based on the code element rate, analyzing energy change characteristics of I-path and orthogonal Q-path components of the received signal, and detecting and identifying a code element boundary position to obtain a code element boundary sequence; and for each code element interval divided by the code element boundary sequence, aggregating I-path and Q-path sampling values in a stable region of each code element interval to obtain constellation point coordinates corresponding to each code element, and generating a constellation diagram by all constellation points. According to the invention, clear and accurate constellation diagram recovery of various modulation signals, especially high-order QAM signals, under the condition of low signal-to-noise ratio is realized.

The invention relates to a method for removing noise points of a constellation diagram, and belongs to the field of wireless signal processing. The method comprises the following steps: creating a counting constellation diagram according to received signal I and Q component pairs; calculating an average value of pixel values of non-zero pixels in the counting constellation diagram, and determining a subsequent binarization threshold value; and according to a threshold value, carrying out binaryzation on non-0 pixels in the counting constellation diagram to obtain a constellation diagram which can be used for subsequent processing. The method for removing the noise points of the constellation diagram is simple in calculation and has important application value in the fields of wireless signal monitoring and management and the like.

This invention discloses a novel self-oscillating optical frequency comb generator, an OEO loop A, used in conjunction with a continuous spectrum laser and a photoelectric oscillator to generate an optical frequency comb; a signal separation component, connected to the OEO loop A via a 1x15 optical demultiplexer A, used to generate real and imaginary signals; a transmission channel, connected to the signal separation component via a 1x15 optical demultiplexer B, used for signal transmission; and a decoding component, connected to the transmission channel, used to recover the real and imaginary signals and perform decoding processing. The OEO loop A includes a single-mode fiber A, a PIN photodetector, an electrical amplifier A, and a bandpass Bessel filter. This invention demonstrates strong and clear constellation diagrams for receiving signals in a 300Gbps 116-QAM transmission and reception channel over uncompensated fiber optic links of standard single-mode fiber (80km to 240km), exhibiting high applicability in coherent optical communication.

The application discloses a kind of communication signal parameter blind estimation methods, devices and program products for intelligent instrument, involve signal identification field, to with low complexity calculation cost, accurately estimate the carrier frequency offset value of electromagnetic signal, symbol rate and pulse shaping filter type.The application carries out normalization to received signal, carrier frequency offset rough correction, estimates carrier frequency offset and meets rate, carries out the pre-estimation of pulse shaping filter type from the spectrum diagram of rough correction signal, and, for square root raised cosine filter / Raised cosine filter, first sequentially carrier frequency offset correction is carried out to first signal, based on square root raised cosine filter Matching filter, and based on symbol rate construction constellation diagram, finally according to constellation diagram, distinguish whether square root raised cosine filter or Raised cosine filter.The application realizes comprehensive, accurate, reliable estimation to electromagnetic signal parameter with low calculation complexity, realizes the automation and wisdom of electromagnetic signal measurement.

The embodiment of the invention provides a signal processing method and device and a receiver, and the method comprises the steps: receiving a data frame which comprises a long training sequence and a plurality of data symbols; performing channel estimation according to the long training sequence and a local long training sequence to obtain an initial channel estimation value, and storing the initial channel estimation value; according to the stored initial channel estimation value, carrying out equalization operation on the data symbols to obtain a constellation diagram signal; performing hard decision on the constellation diagram signal to generate a target constellation diagram signal; and generating an amplitude adjustment signal according to the constellation signal and the target constellation signal, the amplitude adjustment signal being used for adjusting a stored initial channel estimation value to obtain an updated channel estimation value, and demodulating other data symbols by using the updated channel estimation value. By adopting the technical scheme, the channel amplitude change can be effectively tracked, the channel estimation error is dynamically compensated, and the communication quality is improved.