128 results about "Data demodulation" patented technology

The invention relates to the technical field of optical fiber sensing, and provides a distributed fiber bragg grating temperature measurement method for boiler wall temperature measurement, which comprises the following steps of: firstly, preparing a sensor probe consisting of grating optical fibers, connecting the sensor probe with a demodulator, and starting the demodulator after the sensor probe is mounted; the laser is started, a wide-spectrum light source emitted by the laser enters the optical fiber, when the wall temperature of the boiler changes, the effective refractive index and the grating period of the grating are changed, then the Bragg wavelength moves, the data demodulation module detects the movement amount of the wavelength and converts the movement amount into corresponding temperature data, and the temperature data are transmitted to the optical fiber. Then analyzing, calculating and displaying the data; the temperature of the temperature measuring point of the furnace wall is measured through the sensor probe based on the fiber bragg grating, the demodulator analyzes the temperature data and displays the temperature data through the display screen, and therefore accurate temperature measurement of the furnace wall is achieved.

The invention belongs to but is not limited to the technical field of signal extraction, and particularly relates to a gas storage wellbore leakage sound wave signal extraction method and system based on distributed optical fibers, and the method comprises the steps: S1, hardware platform construction: constructing a hardware platform based on a DAS technology; s2, data demodulation: a digital orthogonal demodulation technology is adopted in the demodulation process, and the collected data is decomposed into two mutually orthogonal components, so that phase information is extracted; and S3, shaft leakage sound wave signal extraction: performing algorithm processing according to the demodulated phase information. Compared with the originally collected wellbore leakage sound wave signal, the similarity between the extracted signal and the actual wellbore leakage sound wave signal is higher, and the similarity is mainly characterized in that the difference value of the average amplitude is reduced from 0.21 rad to 0.03 rad, the mean square error is reduced from 0.55 rad2 to 0.17 rad2, and the signal-to-noise ratio is increased by 16.9 dB.

The invention discloses a distribution network power line anti-interference communication method based on adaptive filtering, and belongs to the technical field of distribution network power line communication. According to the method, a communication signal adopting a frequency shift keying modulation mode is acquired from a power line coupler of a distribution network through a signal acquisition module, the communication signal is preprocessed by using a digital signal processing unit, spectral analysis is performed on the preprocessed signal, and characteristic parameters of interference noise are extracted; a coefficient vector of a finite impulse response adaptive filter is initialized based on the characteristic parameters, the order of the filter is in direct proportion to the reciprocal of the dominant interference frequency, fine adjustment is carried out based on noise energy distribution through a table look-up method or a linear mapping relation, and the weight coefficient of the filter is adjusted in real time in the communication process. The adjustment step length is dynamically adjusted according to the real-time estimated signal-to-noise ratio, and finally, the processed signal is output through the adaptive filter and data demodulation is carried out. The method is mainly used for improving the anti-interference capability and the communication reliability of the power private line communication of the distribution network.

The invention discloses a satellite network data sending method and a satellite network data sending device in order to solve the problem that in the prior art, in an ultra-low signal-to-noise ratio mode, frame capture and data demodulation cannot be completed, and therefore the communication requirement of a small-size antenna terminal cannot be met. The frame body part is generated based on the to-be-transmitted satellite load data packet, and the frame header part comprises a pseudorandom sequence and a physical layer signaling which are sufficient in length, so that the signal-to-noise ratio of the whole data frame is improved by increasing the length of the frame header, and the communication performance of the antenna terminal is improved. Therefore, the antenna can be detected and identified by a small-size antenna terminal under the condition of a low signal-to-noise ratio.

The invention discloses a parallel receiving method and system for high-speed 16 QAM (Quadrature Amplitude Modulation) data demodulation, and the method comprises the following steps: S1, carrying out the sampling of received intermediate-frequency 16 QAM data through a high-speed ADC (Analog to Digital Converter), and obtaining four paths of signals through the serial-to-parallel conversion function of the ADC; s2, converting the four paths of signals into 32 paths of parallel signals at a conversion rate of 1: 8 by using a serial-to-parallel converter special for the FPGA; and S3, carrying out digital orthogonal down-conversion on the 32 paths of parallel signals to obtain 16 paths of baseband signals of an I path and a Q path, and then sequentially carrying out matched filtering, timing synchronization, blind equalization, carrier synchronization, frame synchronization and 16QAM judgment decoding to complete parallel receiving. According to the invention, the requirement of high bit rate is met based on three key technologies of timing synchronization, blind equalization and carrier synchronization, and the receiving and demodulation recovery functions of high-speed data in a 16 QAM modulation mode can be effectively completed.

The present invention discloses a method for high-speed non-coordinated concurrent access in an underwater acoustic Internet of Things, which realizes a time-varying channel against Doppler and strong multipath, and improves the throughput of a time-varying underwater acoustic system while solving conflicts. The method includes: 1. Allocate two ZC sequences with different root indexes to different users, which are used as auxiliary sequences and modulation sequences respectively; 2. Use a sliding correlator to perform cross-correlation operations on the received baseband signal. The preamble consists of three repeated ZC base sequences; when detecting continuously equidistant signals exceeding a threshold, retain the potential peaks and their corresponding root indexes, and determine the earliest peak as the starting position of the preamble, and then determine the starting position of data demodulation for different users according to the preamble length; 3. Demodulate the template signal based on the auxiliary sequence, demodulate the signal to be demodulated based on the modulation sequence, introduce the Pearson correlation coefficient with an adaptive weight to calculate the correlation coefficient between the template signal and the signal to be demodulated, and demodulate the data of the specified user from the superimposed data symbols.

The embodiment of the invention provides a signal demodulation method and device, a satellite communication ground receiver and a storage medium, and relates to the field of satellite communication. According to the method, accurate timing capture is realized by performing coarse synchronization on an original received signal, and then the problem of carrier lock loss caused by large-amplitude Doppler frequency shift caused by high-speed motion and the change rate of the large-amplitude Doppler frequency shift is effectively solved by adopting a mode of combining frequency offset correction and dynamic frequency offset compensation; furthermore, a full-field phase compensation sequence is constructed, point-by-point phase correction is implemented, and phase deviation changing along with time is accurately recovered by utilizing an unwrapping and interpolation technology, so that interference of phase ambiguity on demodulation is avoided; and finally, symbol judgment and data demodulation are carried out on the basis of completing frequency and phase double fine correction, so that the error rate is greatly reduced, the robustness and reliability of a satellite communication system under an extreme channel condition are enhanced, and stable and efficient signal recovery under a large-frequency-offset, high-dynamic and low-signal-to-noise-ratio scene is realized.

The invention discloses a system for eliminating fading noise in a distributed optical fiber sound wave sensing system. The system comprises a light source, an optical frequency shift modulator, an optical amplifier, an optical circulator, a photoelectric detector, a data acquisition card and a data demodulator, laser emitted by the light source is modulated into double-pulse light with frequency difference through the light frequency shift modulator, the double-pulse light is injected into the optical fiber through the optical circulator after being amplified by the optical amplifier, Rayleigh backscattered light generated in the optical fiber is emitted back to the optical circulator, light emitted by the optical circulator is detected and converted into an electric signal through the photoelectric detector, and the electric signal is transmitted to the optical fiber through the optical circulator. The electric signals are collected and converted into digital signals through the data collection card, and the data demodulator demodulates the digital signals through a fading noise elimination method to obtain signals with fading noise eliminated. Therefore, fading noise in the distributed optical fiber acoustic wave sensing system can be effectively eliminated, the signal quality is improved, and error signal interference is eliminated.

The invention discloses a noise suppression circuit and image acquisition equipment, the noise suppression circuit comprises a power supply noise sampling circuit, a noise conversion circuit and a noise elimination circuit, the power supply noise sampling circuit is connected with an interface and a power supply circuit, and is used for extracting electric power from the interface and providing the electric power for the power supply circuit, sampling current of the power supply circuit and eliminating noise; obtaining a current interference signal; the noise conversion circuit is connected with the power supply noise sampling circuit and is used for converting the current interference signal into a voltage interference signal; the noise elimination circuit is connected with the interface and the noise conversion circuit, and is used for carrying out noise reduction processing on the uplink signal received by the interface based on the voltage interference signal. Through the above mode, the problem that the current fluctuation signal and the low-frequency uplink signal cannot be eliminated when the frequency bands are overlapped can be solved, so that the probability of error codes in uplink data demodulation is reduced, and the communication reliability and the communication efficiency are improved.

The invention discloses a communication method and a communication device. The communication method and the communication device can be applied to a communication scene supporting simultaneous data and energy transmission. The method comprises: receiving a third signal, the third signal comprising a first OFDM symbol and a second OFDM symbol, the time-frequency resources occupied by the first OFDM symbol and the second OFDM symbol being the same, the first OFDM symbol bearing a first modulation symbol block, the second OFDM symbol bearing a second modulation symbol block, and the first modulation symbol block and the second modulation symbol block being different from each other; the intersection of the set of subcarriers corresponding to the modulation symbols in the first modulation symbol block and the set of subcarriers corresponding to the modulation symbols in the second modulation symbol block is an empty set; charging by using the third signal; obtaining a bit sequence based on the third signal; according to the invention, support can be provided for realizing coexistence of wireless energy transmission and data transmission and considering energy charging efficiency and data demodulation performance at the same time.

The invention discloses a chirp interval modulation backscatter communication method and a chirp interval modulation backscatter communication system based on variable-length scrambling codes, which mainly solve the problems of high power consumption of backscatter labels and high system deployment cost in the prior art. According to the scheme, a sending end sends an environment LoRa signal; the backscattering label modulates information to be sent to an environment LoRa signal in a time interval modulation mode, and modulates a variable-length scrambling code to an anchor symbol; a receiving end performs frequency shift compensation on the backscattering signal by adopting a frequency shift compensation method, demodulates the backscattering signal by combining a sliding window with a variable-length scrambling code, intercepts a backscattering signal sample through the sliding window, and performs de-spreading and fast Fourier transform (FFT) on the signal in the window; the position of an anchor symbol is determined by detecting the maximum value of an FFT peak value, information sent by the backscattering label is recovered from the position of the anchor symbol, and data demodulation is completed. On the premise of keeping demodulation reliability, the power consumption of the tag is effectively reduced, the deployment cost of a backscatter communication system is reduced, and the method can be used for ultra-low power consumption Internet of Things communication.

The invention provides a communication method and a communication device. The method comprises the following steps: acquiring the length of a first orthogonal cover code (OCC) sequence and the index of the first OCC sequence; determining at least one first subcarrier according to the length of the first OCC sequence and the index of the first OCC sequence; sending first data on a first time unit through the at least one first subcarrier, wherein the first data is obtained by performing OCC coding on second data according to the first OCC sequence; and sending a demodulation reference signal (DMRS) sequence on a second time unit through at least one second subcarrier, the at least one second subcarrier belonging to the at least one first subcarrier, and the DMRS sequence being used for demodulating the first data. According to the method, the accuracy of channel estimation can be improved, and the demodulation performance of data is improved.

The invention discloses a programmable electrical nerve stimulation system based on ultrasonic energy supply. The programmable electrical nerve stimulation system comprises an ultrasonic transmitter, a piezoelectric receiver, a rectifier, a power management module, a data demodulation circuit, a control module, an H-bridge driving circuit, a current digital-to-analog converter and an H-bridge circuit, the external ultrasonic transmitter can transmit ultrasonic waves to supply power to the system and transmit data, and the piezoelectric receiver receives ultrasonic signals and converts the ultrasonic signals into alternating current signals. The rectifier and the power management module can convert alternating current signals into direct current signals to provide power for other circuits of the system, the data demodulation circuit processes the alternating current signals to recover data information in ultrasonic waves, the control module controls the H-bridge driving circuit and the current digital-to-analog converter according to the data information, and finally electrical stimulation is achieved through the H-bridge. The system provided by the invention has the characteristics of wireless energy supply, high safety and programmable stimulation parameters, and can realize accurate control of output current parameters.

The invention discloses a multi-fiber dynamic energy supply power transmission line intelligent monitoring system and method, and belongs to the technical field of optical fiber energy supply and sensing, and the system comprises a local control terminal which is used for supplying energy to a plurality of monitoring terminals and receiving multi-mode monitoring data transmitted back by the monitoring terminals, the local control terminal is provided with a laser energy supply module, a data demodulation module and an optical energy dynamic balance control module; the monitoring terminal is used for collecting lead operation state parameters and image information and transmitting the lead operation state parameters and the image information back to the local control terminal through a signal optical fiber; and the multi-core power optical fiber is used for connecting the local control terminal and the plurality of monitoring terminals, and the multi-core power optical fiber comprises a plurality of energy optical fibers which are connected in parallel and a signal optical fiber and supports physical isolation transmission of laser energy supply and multi-wavelength communication. Physical isolation transmission of laser energy supply and multi-wavelength communication is achieved, the energy coupling efficiency is improved, meanwhile, crosstalk between optical fiber channels is effectively reduced, and stable data return is guaranteed.

The invention discloses a distributed intelligent monitoring system and method based on optical fiber communication, and particularly relates to the technical field of optical fiber communication. Brillouin optical time domain analysis is combined with an adaptive laser power regulation and control algorithm, the detection optical power is dynamically adjusted according to the nonlinear characteristic of an optical fiber, nondestructive Kalman filtering is combined with a dynamic Bayesian network, real-time state estimation is carried out on collected data, time sequence analysis is carried out based on a UKF predicted value, and the detection optical power is obtained. An improved signal deconvolution algorithm is introduced in a BOTDA demodulation process to effectively separate SBS-induced false signals, and signal processing is adaptively optimized through a dynamic noise weight adjustment model, so that the accuracy of data demodulation is improved, and the accuracy of SBS-induced false signals is improved. Through fusion of optical signal regulation and control, intelligent data processing and an automatic early warning mechanism, the stability, precision and predictive capacity of the optical fiber monitoring system in a complex environment are improved, and the optical fiber monitoring system is suitable for safety monitoring of key infrastructures.

The invention discloses a chirp delay modulation backscatter communication method and a chirp delay modulation backscatter communication system combined with pseudorandom sequence detection, and mainly solves the problems of low data transmission rate, poor demodulation reliability in a low signal-to-noise ratio environment and high backscatter label complexity in the prior art. According to the scheme, a sending end periodically sends an upper sweep frequency signal as an excitation signal; the backscattering label determines delay time according to a to-be-sent data value, completes one-time modulation in two continuous excitation signal periods, and modulates a pseudo-random sequence into a backscattering signal; and a receiving end demodulates the backscattering signal by adopting a sliding window in combination with a pseudo-random sequence, intercepts the backscattering signal through the sliding window, and performs de-spreading processing and fast Fourier transform on the signal in each window to determine a symbol position so as to realize data demodulation. According to the method, multiple pieces of bit information can be transmitted in one symbol period, the data transmission rate and demodulation reliability are improved, the complexity of the backscattering tag is reduced, and the method can be used for low-power-consumption data transmission of the Internet of Things equipment.

This application discloses a communication method and apparatus, applied in the field of communication technology. The method includes: generating a first signal, wherein a first time slot of the first signal is used to carry a first SSB, a first reference signal, and a second reference signal, the first and second reference signals being correlated with data demodulation, the first reference signal having a QCL relationship with the first SSB, and the second reference signal not having a QCL relationship with the first SSB; and transmitting the first signal. Using this application can reduce the waste of time and frequency resources and improve the utilization rate of time and frequency resources.

The present application relates to the technical field of hard disk monitoring. Disclosed are a data demodulation method and apparatus for a hard disk log, a data modulation method and apparatus for a hard disk log, and a device and a medium. The demodulation method is applied to a baseboard management controller, and comprises: receiving level signals transmitted by state indication pins of a hard disk device, wherein the level signals are signals obtained by the hard disk device performing modulation on the basis of a hard disk log, and original state output signals of the state indication pins; identifying demodulated data corresponding to each target rectangular-wave signal among the level signals; and on the basis of the demodulated data, determining a valid data packet. In the present application, out-of-band monitoring of a hard disk device is realized by means of state indication pins of the hard disk device directly outputting hard disk log data to a baseboard management controller, and thus the problem in a conventional hard disk out-of-band monitoring scheme of it being difficult to realize out-of-band monitoring of a hard disk due to an out-of-band management system not having permission to access hard disk data is solved, thereby expanding the range of hard disk devices that can be subjected to out-of-band monitoring by a baseboard management controller.

The invention discloses a high-robustness pulse position modulation signal receiver, and the receiver comprises a clock data recovery circuit which receives a PPM signal, carries out the continuous frequency division processing, and generates two clock signals CLKB and CLKJZ; the PPM decoding circuit is used for outputting demodulation data and feedback signals; the self-calibration current feedback circuit is used for receiving clock signals CLKB and CLKJZ and a feedback signal, selecting one of the CLKB and the CLKJZ to be output to the PPM decoding circuit based on judgment on the feedback signal, and outputting a control word ICTRL to the current digital-to-analog converter; and the current digital-to-analog converter is used for inputting a reference current IBG and the control word ICTRL from a band-gap reference and outputting a current ICP to the PPM decoding circuit. The decoding circuit has the advantages of being simple in structure, low in power consumption, high in robustness and the like, and data demodulation of PPM signals can be achieved more reliably.

The present application disclosure a method A method and device for controlling a compass bird. The method includes: a main control single-chip microcomputer entering a first deep sleep mode when not processing a task; the main control single-chip microcomputer switching from the first deep sleep mode to a first working mode after receiving an external interrupt signal; a peak detection circuit detecting whether there is a communication carrier signal; a data demodulation unit not starting if the peak detection circuit detects that there is no communication carrier signal; and the data demodulation unit starting to demodulate the communication carrier signal if the peak detection circuit detects that there is the communication carrier signal, and a communication demodulation module sending a demodulated signal to the main control single-chip microcomputer.

Provided in the present application are a communication method and a communication apparatus. The method comprises: a first communication apparatus receiving scheduling information, wherein the scheduling information comprises Z pieces of first information, the Z pieces of first information comprising first information associated with the first communication apparatus, each of the Z pieces of first information being associated with at least one communication apparatus, and Z being an integer greater than 1; and sending data on the basis of precoding information, the precoding information being determined on the basis of the first information associated with the first communication apparatus; or receiving data on the basis of demodulation information, the demodulation information being determined on the basis of the first information associated with the first communication apparatus. In this way, there is no need to send, along with data, DMRSs used to assist in receiving the data, thereby reducing resource overheads caused by sending DMRSs used for demodulating data of various communication apparatuses, and reducing delay caused by processing the DMRSs.

The invention relates to an OFDM (Orthogonal Frequency Division Multiplexing) signal processing method and device, computer equipment and a storage medium. The method comprises the following steps: respectively carrying out carrier demodulation processing on each OFDM signal; performing channel estimation processing on each demodulated sub-carrier signal corresponding to each antenna to obtain a channel estimation result, performing channel equalization processing on each demodulated sub-carrier signal according to the channel estimation result to obtain a first compensation sub-carrier signal, and performing channel equalization processing on each demodulated sub-carrier signal according to the difference between the local pilot frequency sub-carrier signal and the pilot frequency compensation sub-carrier signal to obtain a second compensation sub-carrier signal; performing compensation processing on each first compensation subcarrier signal to obtain a second compensation subcarrier signal; determining a target signal-to-noise ratio and a combination weight corresponding to each antenna according to each second compensation subcarrier signal corresponding to each antenna; and merging the second compensation subcarrier signals according to the merging weights corresponding to the antennas, and performing data demodulation processing on the merged signals to obtain target data. By adopting the method, the precision of the restored target data can be improved.

The application discloses a kind of underground space optical cable high fidelity sound restoration method based on DAS system, comprising: the real-time signal collected to optical cable is carried out data demodulation, identify whether it contains energy impact signal generated by the optical cable after being padded and being hit, if it contains, the energy abnormal distribution position in energy impact signal is positioned, obtains positioning point;Continuous analysis time domain signal of positioning point, after filtering low-frequency interference signal, phase anomaly signal is rejected;The sound signals of a plurality of equivalent sensing nodes adjacent to the positioning point are superimposed and averaged to suppress additive noise, and then the sound signal is restored.The application can realize rapid positioning according to the spatial distribution mapping relationship of optical cable, and after filtering background noise from the collected signal, the highly correlated signals of multiple spatial sensing nodes near the positioning position are linearly superimposed to suppress additive random noise, and high-fidelity sound signal restoration is realized.

The application provides a carrier frequency synchronization method applied to a frequency hopping data transmission system, the frequency hopping data transmission system comprising a transmitting end and a receiving end, and the method comprises the following steps: the transmitting end processes to-be-sent data into a data frame, adds a pilot head based on a ZC sequence to the data frame to form a frequency hopping data transmission frame, and sends a radio frequency signal carrying the frequency hopping data transmission frame to the receiving end; the receiving end acquires the radio frequency signal, processes the radio frequency signal into a digital signal; carrier synchronization processing is performed on the digital signal, carrier frequency scanning is performed on multiple frequency hopping points to screen effective communication frequency points; the starting position of the data frame is determined according to the effective communication frequency points, data demodulation and decoding are performed on the data frame, and original data is recovered. Through the application, the excellent autocorrelation characteristics of the ZC sequence and the intelligent double-peak detection mechanism are utilized to realize carrier frequency synchronization without strict time synchronization, and fast and anti-interference data transmission is completed.

The present application provides a communication method and apparatus. The method comprises: a terminal device sends a first symbol group at a first frequency position, and then, the terminal device sends a second symbol group at a second frequency position, wherein the first frequency position is different from the second frequency position, the first symbol group and the second symbol group are included in a plurality of symbol groups, the plurality of symbol groups are determined on the basis of first data of the terminal device and a first sequence corresponding to the terminal device, and the first sequence is contained in a modulation sequence set. By performing frequency hopping transmission of symbol groups at different frequency positions using symbol groups as units, a better frequency diversity gain can be obtained, helping to improve the robustness of the data demodulation performance, such that performance loss caused by a plurality of symbol groups simultaneously undergoing deep channel fading can be avoided or reduced, and the coverage can be improved.

The present application provides a communication method, apparatus and system. In the method, a terminal device first transmits a first reference signal for channel sounding, and then transmits uplink data and a second reference signal which is used for uplink data demodulation, wherein the first reference signal and the second reference signal use an identical sequence. By matching statistical properties of the sequences of the first reference signal and the second reference signal, such as the autocorrelation and cross-correlation properties of the sequences, channel measurement results and interference measurement results based on the first reference signal and the second reference signal are matched with each other. Consequently, parameters or processing related to uplink data scheduling determined on the basis of the first reference signal is better adapted to an actual channel and an actual interference experienced during uplink data transmission, thereby improving uplink transmission performance.

The present invention discloses a precoding transmission method and device based on a RIS-assisted vehicle networking communication system. The method includes the following steps: constructing an orthogonal LFM waveform based on the channel characteristics of the RIS-assisted vehicle networking communication system and the multi-user transmission requirements; obtaining a precoded RIS-assisted vehicle networking communication system cascade channel matrix based on a preset precoding matrix; converting the precoded RIS-assisted vehicle networking communication system into a real-domain precoding linear model; setting the precoding equivalent channel matrix of the real-domain precoding linear model to a unit matrix to obtain a precoding matrix of the vehicle networking communication system; estimating the real-domain precoding equivalent channel of the real-domain precoding linear model based on a linear channel estimation algorithm; and performing data demodulation on the transmitted information based on a multi-antenna combined minimum Euclidean distance algorithm to complete information transmission. The present invention can reduce channel estimation overhead, improve the high reliability of information transmission, and enhance the anti-interference capability between multiple users.

The present disclosure provides a method for testing the signal vector error magnitude (EVM) of a multi-channel antenna device, comprising obtaining a test data source comprising multiple streams through preset orthogonal coding; dividing the test data source into multiple channels of the multi-channel antenna device for transmission; wherein the data transmitted by each channel comprises a portion of data from each stream, and the data transmitted by all channels comprises all data from all streams; receiving a composite signal; wherein the preset orthogonal coding enables the composite signal to satisfy the following conditions: after demodulation, the composite signal only obtains data from a specified stream in the test data source; and demodulating the composite signal based on the data from the specified stream to determine the signal vector error magnitude (EVM) of the multi-channel antenna device. The present disclosure also provides a device and medium for testing the EVM of signals of a multi-channel antenna device.

A signal processing circuit includes a channel estimation device, a data processing circuit and a false path detection circuit. The channel estimation device estimates transmission paths of a received signal based on a preamble portion of the received signal to generate channel parameter information. The data processing circuit processes a data portion of the received signal according to the channel parameter information to generate a data demodulation result associated with each transmission path. The false path detection circuit determines a characteristic value based on the data demodulation result associated with each transmission path, determines whether corresponding transmission path is a false path according to the characteristic value and the channel parameter information, and updates the channel parameter information to generate updated channel parameter information in response to the corresponding transmission path being determined as a false path. The updated channel parameter information does not comprise information regarding the false path.

Disclosed in the present application are a communication method and a communication apparatus. The present application is applicable to communication scenarios that support simultaneous data and power transfer. The method comprises: receiving a third signal, the third signal comprising a first OFDM symbol and a second OFDM symbol, the first OFDM symbol and the second OFDM symbol occupying a same time-frequency resource, the first OFDM symbol carrying a first modulation symbol block, and the second OFDM symbol carrying a second modulation symbol block, wherein the intersection of a set of subcarriers corresponding to modulation symbols in the first modulation symbol block and a set of subcarriers corresponding to modulation symbols in the second modulation symbol block is an empty set; performing power charging by using the third signal; and, on the basis of the third signal, obtaining a bit sequence. The present application can provide support for ensuring both the power charging efficiency and data demodulation performance while implementing simultaneous wireless power transfer and data transfer.