1029results about "Carrier regulation" patented technology

The embodiment of the invention provides a synchronous code detection method, system and device in a low earth orbit satellite communication system, and the method comprises the steps: grading an obtained maximum frequency offset range value of the low earth orbit satellite communication system, and obtaining frequency offset values of different grades, performing synchronous code capture on a first receiving signal of the input signal flow under the frequency offset values of different grades, and obtaining an initial frequency offset estimation value according to a capture result; compensating a second receiving signal of the input signal flow by using the initial frequency offset estimation value, and performing synchronous code capture on the compensated second receiving signal to obtain a candidate synchronous code position confirmed by coarse compensation; based on the candidate synchronous code position, performing frequency offset estimation on the synchronous code data under the plurality of time slots to obtain a candidate frequency offset estimation value; and compensating a third receiving signal of the input signal flow by using the candidate frequency offset estimation value, and performing synchronous code capture on the compensated third receiving signal to obtain a synchronously captured target synchronous code position. According to the invention, the detection of the synchronous code in the low-orbit satellite communication system is realized.

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.

This application discloses an information transmission method and apparatus, a first device, and a second device, which belongs to the field of communication technologies. The information transmission method in embodiments of this application includes: sending, by a first device, frequency offset indication information to a second device, where the frequency offset indication information is used for controlling a frequency offset generated during modulation of a carrier signal, and the frequency offset is an offset relative to a central frequency of the carrier signal; and receiving, by the first device, data transmitted by the second device, where the data is transmitted through a backscatter signal sent by the second device to the first device, and the backscatter signal is a signal obtained after the second device modulates the carrier signal based on the frequency offset indication information.

Embodiments are disclosed for capability reporting for antenna switching, AS, sound reference signals, SRS. A user equipment (UE) can transmit a capability report for AS SRS that includes a plurality of receive antenna (e.g., six or eight receive antenna), and receive SRS instructions based on the capability report. The UE can transmit a first temporary capability reduction for a duration, and transmit a first SRS according to the first temporary capability reduction and the SRS instructions, while maintaining phase continuity. To maintain phase continuity, the UE can calibrate one or more SRS ports participating in the AS SRS to transmit with substantially a same transmit power. The UE can determine that a second SRS overlaps an other transmission in a time domain, determine that the other transmission has an absolute priority over the second SRS, and transmit the other transmission but not the second SRS.

The invention provides a frequency offset estimation method and device based on a 5G demodulation reference signal, and the method comprises the steps: determining a first frequency offset estimation value set according to a frequency domain receiving sequence and a local sequence of a DMRS symbol configured by a physical layer channel; eliminating frequency offset estimation values with absolute values greater than a preset threshold value in the first frequency offset estimation value set to obtain a second frequency offset estimation value set; performing frequency offset compensation on the DMRS symbol by using each frequency offset estimation value in a second frequency offset estimation value set to obtain a frequency offset compensation sequence of each frequency offset estimation value on the DMRS symbol; and performing correlation operation on the frequency offset compensation sequence of the DMRS symbols and the local sequence of the DMRS symbols by the frequency offset estimation values to obtain correlation values, and taking the frequency offset estimation value corresponding to the maximum correlation value as a frequency offset estimation result. The method effectively improves the frequency offset estimation range, enables the system to support larger Doppler frequency offset tracking and compensation, and further supports larger relative movement speed of a receiving end and a transmitting end.

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 discloses a broadband receiver ADC nonlinear spurious suppression method and device, and relates to the technical field of instruments and meters, and the method comprises the following steps: receiving an intermediate frequency signal, carrying out the analog-to-digital conversion of the intermediate frequency signal, and obtaining a digital intermediate frequency signal, the intermediate frequency signal being obtained through the receiving of a superheterodyne architecture; the method comprises the following steps: reducing the signal bandwidth of a digital intermediate frequency signal by using a CIC extraction mode to obtain different signal bandwidths BW, and performing spectral analysis on the different signal bandwidths BW by using a fixed-point FFT to obtain corresponding resolution bandwidths RBW; on the premise that the cost of the receiver is not increased, spurious signals under the narrow-band instantaneous bandwidth are reduced, and the index of the receiver is improved.

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 frequency offset estimation method and device, electronic equipment and a storage medium, and relates to the technical field of signal processing. In the invention, based on a data signal sent by a signal transmitting end and a local characteristic signal, a subsequent signal used for frequency offset estimation can be obtained, i.e., a fusion signal carrying frequency offset information is obtained; moreover, Chirp-Z transformation is carried out on the fusion signal in a limited residual frequency offset range of a data transmission channel, so that not only is spectrum information of the fusion signal meeting a fine frequency offset estimation requirement obtained, but also the calculation complexity is reduced to a certain extent as the residual frequency offset range is fine, and the accuracy of frequency offset estimation is improved. Namely, high-precision frequency offset estimation is completed under reasonable calculation complexity, so that the problem of insufficient timeliness of signal processing is solved; in addition, in the frequency offset estimation process, the frequency offset estimation precision is further improved by combining the frequency spectrum peak offset.

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 invention relates to the field of data transmission, in particular to an intelligent power grid data transmission method based on carrier modulation, which comprises the following steps: periodically acquiring key equipment, and determining a node analysis mode according to the category of each piece of key equipment; determining a to-be-analyzed monitoring node set of the corresponding dense area according to the quality parameters; determining a key paragraph analysis mode according to the number of the operation execution personnel and the proportion of the execution paragraphs; determining a transmission monitoring node set according to the quality parameters of the associated monitoring nodes of the second-class key devices and the average line distance; setting matching control nodes corresponding to the transmission monitoring node sets under the condition that the set confirmation is completed; under the information transmission condition, whether the transmission execution scheme is updated or not is periodically determined according to the fluctuation transmission line proportion, the effectiveness of the information obtained by the user is improved, and then the accuracy of the judgment result for the abnormal reason based on the obtained data is improved.

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 provides a DFT precoding FBMC system carrier synchronization method oriented to air-ground communication. The method comprises the following steps: acquiring FBMC symbol data to be transmitted; a special CAZAC sequence with the length of M / 4 is constructed, four synchronous sequence symbols are constructed, and corresponding sending signals of a time domain are output after the four synchronous sequence symbols and other data symbols are subjected to conjugate symmetry module, pre-FFT, IFFT subcarrier modulation and PPN multi-phase filtering; the method comprises the following steps: constructing a local sequence at a receiver end, respectively taking two continuous parts with the length of M / 4 from a received special time domain sequence signal, and respectively correlating the two continuous parts with corresponding parts of the local sequence to obtain a correlation result; and conjugating the correlation result of the first part of sequence, multiplying the conjugate with the correlation result of the second part of sequence to obtain a frequency offset measurement function, obtaining decimal frequency offset estimation according to the frequency offset measurement function, and carrying out carrier frequency offset compensation by using a frequency offset estimation value. According to the method, a synchronous training sequence design method is provided, and carrier frequency offset is estimated and corrected by using time domain signal construction characteristics of a training sequence.

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.

The invention discloses a frequency offset compensation method and electronic equipment, relates to the field of communication, and is used for respectively compensating crystal oscillator frequency offset and Doppler frequency offset when the electronic equipment performs satellite communication. The frequency offset compensation method comprises the following steps: obtaining a direction vector of an electronic device pointing to a satellite in an electronic device coordinate system according to a phase difference of downlink signals from the satellite received by a plurality of antennas; obtaining a direction vector of the electronic equipment pointing to the satellite in the earth coordinate system according to the direction vector of the electronic equipment pointing to the satellite in the electronic equipment coordinate system and the attitude information of the electronic equipment; obtaining the coordinates of the satellite in the earth coordinate system according to the direction vector of the electronic equipment pointing to the satellite in the earth coordinate system; according to the carrier frequency of the downlink signal emitted by the satellite and the coordinates of the satellite in the earth coordinate system at multiple moments, Doppler frequency offset and crystal oscillator frequency offset of the downlink signal are obtained; and compensating the carrier frequency of the uplink signal sent by the electronic equipment.

A modem is configured to receive a transmitted waveform transmitted from a satellite (SAT) to a user terminal (UT). The modem includes: a receiver, on the UT, configured to receive the transmitted waveform from the SAT, the transmitted waveform comprising first resource blocks intended for the UT and second resource blocks intended for a second UT, a first set of components configured with the receiver on the UT to process the transmitted waveform with the first resource blocks and the second resource blocks, a multi-user demapper configured with the receiver to extract the first resource blocks from the transmitted waveform to yield a per-user signal, and a second set of components configured within the receiver to demodulate and decode the first resource blocks in the per-user signal.

The invention provides an underwater acoustic communication dual-mode demodulation method and system based on minimum frequency shift keying, and the method comprises the steps: receiving an underwater acoustic signal, carrying out the preprocessing, and carrying out the channel estimation of a training sequence in the underwater acoustic signal; calculating a phase change index according to a channel estimation result; when the phase change index is higher than a set bit error rate threshold value, processing the received signal in an incoherent demodulation mode; and when the phase change index is lower than a set bit error rate threshold value, processing the received signal in a coherent demodulation mode. The method has the advantages that the problem of insufficient applicability of a single demodulation mode in different underwater acoustic communication environments is solved; it is ensured that the system maintains good communication performance under different channel conditions; the problem of information lag can be avoided, the limitation of a traditional single demodulation mode is broken through, and the reliability and robustness of the system in a variable underwater acoustic channel are remarkably improved.

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.

The invention provides a communication method, which can be applied to a WLAN (Wireless Local Area Network) system supporting an IEEE 802.11 be next generation, Wi-Fi 8 and other 802.11 series protocols, and can also be applied to a UWB (Ultra Wideband)-based wireless personal area network system and a sensing system. The method comprises: in a scene of channel competition, before a certain station sends a delay signal indicating that other stations wait for a period of time and then perform channel competition, a CFO is calibrated according to a first PPDU finally received before the delay signal is sent. According to the embodiment of the invention, the CFO is calibrated based on the finally received PPDU, so that a plurality of delay signals cannot be normally received by other stations due to overlarge CFO deviation in a scene that the plurality of stations all send the delay signals.

The invention relates to the technical field of wireless communication, in particular to a low-orbit satellite broadband Doppler simulation and compensation method based on an OFDM (Orthogonal Frequency Division Multiplexing) system, which comprises a simulation process and a compensation process, and the compensation comprises time domain compensation and frequency domain compensation. According to the broadband Doppler simulation method provided by the invention, the wireless signal more conforming to a real satellite-ground communication scene can be generated, and a ground terminal receiver which performs simulation design based on the analog signal can obtain better performance. The broadband Doppler time domain compensation method provided by the invention is suitable for high-throughput, large-bandwidth and high-order modulation scenes, and can accurately compensate the interference of Doppler frequency shift and improve the demodulation performance. The broadband Doppler frequency domain compensation method provided by the invention is suitable for low-delay, small-bandwidth and low-order modulation scenes, an original ground cellular network terminal receiving scheme does not need to be modified basically, and better demodulation performance can be obtained under the condition of low development cost.

The invention discloses a weak spread spectrum signal hierarchical synchronous receiving method, which is based on a long coherent accumulation mechanism, utilizes the difference of the code lengths of different spread spectrum codes to the sensitivity of frequency offset, and realizes the efficient synchronous receiving of the signals through the hierarchical capture of code phases and the step-by-step compensation of the frequency offset. Compared with a traditional two-dimensional joint search (code phase and frequency) method, the method has the advantages that the search process is optimized into one-dimensional search, and exhaustive search of frequency dimension is avoided, so that the calculation complexity is remarkably reduced, and the processing efficiency is improved. According to the method, a strategy of capturing the code phase step by step is adopted, and a coarse estimation scheme and a fine estimation scheme of frequency offset are combined, so that relatively high capturing sensitivity and synchronization precision are ensured. Especially in a low signal-to-noise ratio environment and a complex channel condition, the receiving reliability of the spread spectrum signal can be effectively improved. The method and the system have the advantages of low calculation complexity, simplicity in hardware implementation, high adaptability and the like, and an innovative solution is provided for receiving and processing weak spread spectrum signals.

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 discloses a method for tracking a signal with a large Doppler frequency change rate by using FFT (Fast Fourier Transform), which comprises the following steps of: S1, acquiring an input signal, and performing preliminary frequency offset compensation on the acquired input signal; s2, de-spreading the signal after the initial frequency offset, and performing phase correction on the de-spread signal; s3, performing FFT calculation on the signal after phase correction, and obtaining a residual frequency offset value; and S4, according to the residual frequency offset value, returning to S1 to circularly carry out frequency offset compensation on the input signal until the signal tracking is finished. According to the invention, an open-loop tracking mode is adopted, and the problem that a traditional three-order phase-locked loop cannot realize carrier tracking of a large Doppler frequency change rate of a short-time burst signal is solved.

The embodiment of the invention discloses a positioning method and a related device, which are used for realizing that a first device receives at least two pieces of first frequency information from network equipment and sends at least two positioning reference signals according to the at least two pieces of first frequency information. The transmission bandwidth of the first device for sending the positioning reference signal is improved, so that the positioning precision is improved. The method comprises: a first device receiving at least two pieces of first frequency information from a network device, the at least two pieces of first frequency information comprising first frequency information 1 and first frequency information 2, the first frequency information 1 being used for the first device to send a first positioning reference signal, and the first frequency information 2 being used for the first device to send a second positioning reference signal; the first frequency information 2 is used by the first device to send a second positioning reference signal; and the first device sends at least two positioning reference signals according to the at least two pieces of first frequency information, wherein the at least two positioning reference signals comprise the first positioning reference signal and the second positioning reference signal.

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 invention provides a phase correction method and a communication device. The device comprises a radio frequency module and a signal transmission module. The radio frequency module comprises a plurality of radio frequency interfaces, the plurality of radio frequency interfaces are connected with the signal transmission module, and the signal transmission module is further connected with at least one antenna interface; the radio frequency module is used for sending a first radio frequency signal through a plurality of radio frequency interfaces; the signal transmission module is used for transmitting a first radio frequency signal to the at least one antenna interface and transmitting the first radio frequency signal to the radio frequency module in a loopback manner at the at least one antenna interface; and the radio frequency module is also used for correcting the phases of the signals sent by the plurality of radio frequency interfaces based on the first radio frequency signal transmitted back in the loopback manner. According to the invention, phase correction can be carried out on each radio frequency interface of the radio frequency module under the condition that a correction interface is not arranged in the communication device, so that interface resources are saved.

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.