42 results about "Frequency agility" patented technology

The invention discloses a frequency agility relativistic magnetron based on a dynamic seal axial tuning assembly, and belongs to the technical field of high-power microwave sources. Comprising an anode cylinder, N anode blades, a vacuum chamber shell, a magnetofluid sealing assembly, N / 2 fan-shaped insertion pieces and a tuning assembly, the vacuum chamber shell is coaxially arranged outside the anode cylinder, and an annular vacuum chamber is formed between the vacuum chamber shell and the anode cylinder; an inner sleeve of the magnetofluid sealing assembly is connected with the anode cylinder, and an outer sleeve is connected with the vacuum chamber shell; the tuning assembly is arranged in the vacuum chamber. According to the invention, the axial movement of the tuning assembly is realized through the matching relation of the anode cylinder, the tuning assembly and the vacuum chamber shell, so that the sizes of the coupling slot and the fan-shaped waveguide cavity are changed, and the resonant frequency of the resonant cavity formed by the fan-shaped resonant cavity, the coupling slot and the fan-shaped waveguide cavity is changed; and finally, real-time frequency agility of the device in a high-vacuum state is realized.

The invention discloses a frequency agility cognitive SAR (synthetic aperture radar) anti-interference strategy generation method based on action migration-demonstration learning, which is applied to the field of SAR anti-interference and mainly solves the problems of low anti-interference strategy generation speed and unstable initial performance of the existing SAR system in a complex interference environment. According to the method, modeling is carried out on an FASAR anti-interference confrontation scene, and an FASAR anti-interference strategy generation problem is converted into a Markov decision process (MDP) problem. The invention provides a two-stage reward shaping method to solve the sparse reward problem in the decision making process. According to the method, an ATLfD method is provided based on a transfer learning framework, FASAR in a target confrontation environment is pre-trained by using interference confrontation experience in a source environment, and learning of an optimal strategy in the target environment is guided by using an expert network trained in the source environment. According to the method, the anti-interference performance of the FASAR in the initial confrontation stage can be improved, and meanwhile the generation speed of the optimal anti-interference strategy is increased.

A laser system (1) comprises an in-phase quadrature-phase optical modulator (4) to generate a two-tone, single-sideband, suppressed-carrier optical signal by modulation of an input laser beam, and a fibre Bragg grating (6) to receive and filter the two-tone, single-sideband, suppressed-carrier optical signal output by the in-phase quadrature phase optical modulator (4). The passband of the fibre Bragg grating (6) excludes harmonics of the frequencies of the two tones in the two-tone, single-sideband, suppressed-carrier optical signal output by the in-phase quadrature-phase optical modulator (4). Thus, the system (1) is frequency-agile and produces highly-phase-coherent light beams.

The invention discloses a wide-area radar system combining satellite-borne mechanical scanning and phase scanning. The wide-area radar system is composed of a central processing unit, a servo controller, an active phased-array antenna and a scanning mechanism. The servo controller is mounted on the platform cabin, is rigidly connected and does not rotate; the central processing unit and the active phased-array antenna are installed on the load cabin, the load cabin is connected with the platform cabin through the scanning mechanism, and the servo controller controls the whole load cabin to rotate around the center of the load cabin. According to the method, a brand new satellite-borne wide-area radar system architecture is constructed, mechanical scanning and electric scanning characteristics are combined, flexible control of beam broadening, tracking staring, wide-area searching, frequency agility, power control and the like of a radar system is supported, and the method has an application mode integrating detection, tracking, imaging and recognition.

The application discloses a networking radar jamming and mutual jamming elimination method based on decentralized Q learning, first, according to the phased array radar signal processing flow, a target echo signal, a jamming signal and a mutual jamming signal model are established, second, the conditions of radar jamming and mutual jamming are analyzed, a multi-radar frequency domain resource scheduling optimization model based on the SIJNR criterion is established, then each radar is regarded as an intelligent agent, the multi-radar cooperative anti-jamming and anti-mutual jamming process is constructed into a generalized Markov decision process, and the frequency domain resource scheduling optimization model is converted into a value function optimization model, finally, the DQJIE algorithm is used to solve the problem, and the frequency agility strategy of each radar is obtained. The method constructs the multi-radar cooperative anti-jamming and anti-mutual jamming process into a generalized Markov decision process, effectively suppresses the mutual jamming in the system while resisting the frequency sweeping jamming, and effectively improves the networking radar detection performance.

The invention discloses an interference signal suppression method and device based on an inter-pulse carrier frequency agility short pulse signal, a computer readable storage medium and computer equipment, relates to the technical field of communication, and mainly aims to solve the problem that an existing agility system radar is still poor in anti-interference capability in a complex electromagnetic environment and poor in interference performance. And the requirement of effectively detecting a detection target in a strong confrontation environment cannot be met. Comprising the steps that after radar equipment transmits an inter-pulse carrier frequency agile short pulse signal and receives an echo signal, a baseband echo matrix is acquired, and an interference judgment threshold value is determined based on the baseband echo matrix; when the variance of the distance unit of the baseband echo matrix is greater than the interference judgment threshold, determining that the distance unit contains an interference signal; and performing zero setting operation on the distance unit to obtain an echo signal after interference suppression.

The application provides a multi-station frequency agile radar anti-interference and synergistic method, through two short baseline pulse interval frequency agile radars receiving echo signals and carrying out mixing processing and pulse compression; interference pulses of an echo data matrix are removed and the remaining pulses are combined to obtain a new echo data matrix; a distance-speed two-dimensional redundant dictionary matrix corresponding to the new echo data matrix and matched with target information is constructed in combination with transmission parameters; then a compressed sensing model is constructed and a reconstruction result of an original signal is obtained by solving.The application selects two pulse interval frequency agile radars to work synergistically, which can effectively improve signal processing gain, has strong electronic countermeasure capability, good target detection capability and excellent electromagnetic compatibility; by utilizing the characteristic that only some pulses of echo of the pulse interval frequency agile radar may be interfered, the interfered pulses are directly removed in the echo data matrix, and complex matrix operation is not involved, so that the calculation complexity is low and the running speed is fast.

A radio frequency (RF) communications system may include a first RF node that transmits data, including a new frequency of operation, and a sequence of pilot symbols spread with a complex spreading code sequence. A second RF node may receive an incoming signal from the first RF node and perform despreading for N sample offset delays to generate N despreading sequences for the sequence of pilot symbols. The second RF node may perform a cross-correlation to select a desired despreading sequence from the N despreading sequences, determine a phase offset and timing offset, process the incoming signal based upon the desired despreading sequence, phase offset and timing offset, and switch to the new frequency of operation.

The invention discloses an intelligent frequency agility method and system based on frequency spectrum cognition and deep learning, and the method comprises the steps: generating a plurality of baseband linear frequency modulation signals with different center frequencies, and obtaining a broadband radio frequency linear frequency modulation signal set; inputting the signals into a digital phased array receiving channel at the same time to obtain a multi-path baseband data set; according to the real-time total delay of the receiving channel, performing integral multiple clock period delay on each signal data in the baseband data set to obtain a delay linear frequency modulation signal set; according to the multi-path baseband data set and the delay linear frequency modulation signal set, determining a peak position of each datum in the correlation peak data set through a peak search algorithm model, and further calculating a phase difference set; and removing a first-order linear component and a direct-current component in the phase difference set by adopting a dechirp algorithm to obtain a phase nonlinear set of the digital phased array receiving channel. According to the invention, nonlinear, efficient, accurate and low-cost measurement of the phase of the digital phased array receiving channel can be realized.

The invention discloses a folding clutter suppression method based on a frequency agility radar, and the method comprises the steps: setting the pulse number of a frequency agility pulse sequence, a frequency hopping interval and a frequency hopping coefficient of each frequency agility pulse signal, and transmitting a plurality of frequency agility pulse signals; calculating the carrier frequency of the echo signal received by the frequency agility radar according to the frequency hopping interval and the frequency hopping coefficient; filtering the echo signal by using a frequency domain filter corresponding to the echo signal carrier frequency, and outputting the filtered echo signal; respectively performing impulse response and convolution processing on the time domain and the frequency domain of the filtered echo signal by using a matched filter, and outputting the echo signal after matched filtering; and sparse reconstruction is carried out on observation signals in the sparse reconstruction model by using an orthogonal matching pursuit algorithm or an alternating direction multiplier method to obtain sparse vectors, so that target signal energy is enhanced, non-matching interference components are suppressed, significant enhancement of weak and small targets is realized, and folding clutters and noise are suppressed.

A system and method for testing coherent and frequency agility characteristics of a radar echo simulation device, the system comprising: a local oscillator signal generation module for generating a frequency agile local oscillator signal; a signal transmission module for generating a modulated transmit baseband signal; upconverting the modulated signal and transmitting to the device under test, outputting the phase and frequency of the transmit baseband signal to a phase difference calculation module and a frequency difference calculation module; a signal reception module for receiving a signal returned by the device under test, downconverting the received signal based on the frequency agile local oscillator signal to obtain a receive baseband signal, outputting the phase and frequency of the receive baseband signal to the phase difference calculation module and the frequency difference calculation module; a phase difference calculation module for calculating the phase difference between the receive baseband signal and the transmit baseband signal; a frequency difference calculation module for calculating the frequency difference between the receive baseband signal and the transmit baseband signal; a testing module for determining the coherent characteristic and the frequency agility characteristic of the device under test based on a plurality of sets of phase difference values and a plurality of sets of frequency difference values, respectively.

The invention belongs to the field of radar signal processing, discloses a method for acquiring a one-dimensional range profile of a high-speed moving target by sub-pulse linear frequency modulation emission and inter-pulse frequency agility radar, and realizes frequency agility waveform echo high-speed target detection and correction based on sparse representation. In the prior art, distance and Doppler parameter estimation of target echoes can be generally realized by adopting sparse representation and sparse processing, and orthogonal matching pursuit (OMP) is one of common solution algorithms. The carrier frequency of a frequency agility radar jumps randomly between pulses, and the acquisition of a one-dimensional range profile of a high-speed moving target not only needs to correct inter-pulse range migration, but also needs to compensate intra-pulse range-Doppler coupling generated by the change of the carrier frequency. According to the method, firstly, compensation of intra-pulse distance-Doppler coupling is carried out, then distance migration correction is carried out on each frequency agility pulse based on a KeyStone method, sparse processing is carried out on a corrected echo signal by adopting an orthogonal matching pursuit algorithm, and a high-resolution one-dimensional distance image of a target is obtained. Experimental results show that the one-dimensional range profile processing method for performing inter-pulse range migration correction through the KeyStone algorithm is beneficial to target detection in high-speed motion.

The invention provides an anti-severe environment wireless sensing system for a spacecraft. A multi-mode energy collection subsystem is used for collecting heat energy from a spacecraft structure in a high-temperature pneumatic heating environment and converting the heat energy into electric energy; the high-temperature energy storage subsystem is used for storing continuous low-power and transient high-power electric energy and providing transient high-power support for frequency agile communication and acoustic standby communication during sudden communication; the plasma self-adaptive frequency agility communication system is used for realizing self-adaptive wireless radio frequency communication in a plasma sheath layer; the acoustic standby communication subsystem is used for providing an independent structure guided wave acoustic communication channel when all radio frequency bands are shielded by plasma; the multi-parameter sensing subsystem is used for realizing measurement and data preprocessing of multiple physical quantities such as temperature, pressure and acceleration in a high-temperature environment; and the functionally graded material packaging structure is used for buffering thermal expansion mismatch under the conditions of high temperature and strong thermal cycle and integrally packaging the subsystems.

The invention discloses an ultra-wideband frequency agility assembly and a signal synthesis method thereof, and relates to the technical field of communication, the ultra-wideband frequency agility assembly adopts a three-stage cavity longitudinal integrated architecture and sequentially comprises a down-conversion and control power supply assembly 101, a fast frequency hopping frequency synthesizer assembly 102 and an up-conversion assembly 103 from top to bottom, the down-conversion and control power supply assembly 101 and the up-conversion assembly 103 are respectively fixed on the fast frequency hopping frequency synthesizer assembly 102 through fastening screws 106. The device is extremely high in assembly integration level, has the functions of frequency conversion, rapid frequency hopping, power supply control and the like, simultaneously adopts a plurality of single-point frequency signals and the comb spectrum generator for frequency mixing to obtain required local oscillation signals, realizes the function of rapid frequency hopping through a low-cost chip, is excellent in generated signal phase noise, avoids complex program control, and is suitable for large-scale popularization and application. And a reasonable stacking structure is adopted to directly conduct heat to a mounting surface, so that an additional heat dissipation device is saved, and the size is reduced.

The invention provides a signal source and a test system, and belongs to the technical field of signal processing, the signal source comprises a phase-locked loop and a controller connected with the phase-locked loop, the controller is used for obtaining a first test parameter, and the first test parameter comprises a target output frequency; determining a target locking voltage corresponding to the target output frequency based on the mapping data table; adjusting an output voltage of a resistance voltage dividing network in the phase-locked loop to be a target locking voltage; the working state of the phase-locked loop is modified from a closed-loop state to an open-loop state, so that the resistance potential-divider network outputs voltage to a loop filter in the phase-locked loop; and modifying the working state of the phase-locked loop from an open-loop state to a closed-loop state, so that a phase discriminator in the phase-locked loop outputs voltage to a loop filter. The resistance potential-divider network is used for outputting voltage to the loop filter, the frequency can be rapidly adjusted to be close to the target output frequency, when the phase-locked loop is in a closed loop state, the frequency is rapidly locked to the target output frequency, and frequency agility is achieved.

The application relates to a long-time accumulation and parameter estimation method under a frequency agile radar system, which comprises the following steps: radar echo signal down-conversion and pulse compression; search parameter interval and search interval initialization; non-uniform frequency domain generalized Radon Fourier transform is adopted to complete distance correction, Doppler phase compensation and hopping phase elimination under specific search parameters, and coherent accumulation is completed; search parameters are traversed, constant false alarm detection is carried out after signal energy is projected to the search parameter domain, if there is a target, the target motion parameters are determined according to the position of the energy peak, and the target motion track is output. The application effectively improves the echo signal-to-noise ratio of a complex maneuvering target and has target detection capability under a strong noise background.

The invention particularly relates to an in-pulse agile waveform design method based on an SA-2opt parallel optimization algorithm, which comprises the following steps of: optimizing an in-pulse frequency-frequency modulation agile waveform based on the SA-2opt parallel optimization algorithm by taking a minimum self-correlation side lobe peak value as a target function, and firstly, preliminarily obtaining a frequency and frequency modulation coding sequence by adopting a simulated annealing (SA) algorithm; local search is carried out on the frequency modulation rate code by using a 2-opt algorithm, multiple groups of the processes are carried out in parallel, and a sequence with the lowest side lobe is selected as a final frequency and frequency modulation rate code. According to the method disclosed by the invention, the distance sidelobe with relatively high frequency coding waveform in the traditional pulse is inhibited, and the waveform complexity is improved, so that the probability that radar signals are intercepted is reduced; the orthogonality between the sub-pulses is improved by adopting a frequency-modulation frequency joint coding method, the mutual shielding characteristic between the sub-pulses is enhanced, and the method can be applied to suppression of intermittent sampling and forwarding interference.

The invention discloses a non-coherent multi-frequency multi-scanning radar data processing method. The method comprises the steps of 1, constructing a target echo intensity synthesis model with a confidence coefficient matrix; 2, respectively constructing parameter estimation models for m coefficients in the m coefficient matrix and n coefficients in the n coefficient matrix by adopting a method of combining Bayesian parameter estimation and an RANSAC (Random Sample Consensus) algorithm; 3, estimating parameters; 4, updating parameters; and step 5, radar echo data processing. According to the method, a robust statistical method and a Bayesian estimation method are combined, a target echo intensity confidence coefficient matrix is established, and multiple groups of radar echo intensity data of the same target generated in a multi-frequency multi-scanning working mode are re-synthesized, so that the radar echo stability is effectively improved; radar echo flicker caused by frequency agility, target motion attitude adjustment, environmental factor influence and the like can be handled. In addition, real-time operation iteration can be achieved, and the requirement for operation resources is not high.

The invention provides a waveform design method for resisting intermittent sampling forwarding interference, and relates to the technical field of radar detection and countermeasure, and the method comprises the steps: determining and matching the sub-pulse width of a radar transmitted waveform according to the estimation of a radar on the sampling pulse width of a jammer; based on the matched sub-pulse width, performing segmentation and frequency coding on the linear frequency modulation signal to form a frequency agility waveform; according to the interference strategy and the frequency coding sequence, constructing a fitness function used for evaluating the characteristic difference of the target echo signal and the interference signal in the time-frequency domain; optimizing the fitness function by adopting a genetic algorithm, and solving an optimal frequency coding sequence which maximizes the time-frequency domain characteristic difference; and according to the optimal frequency coding sequence, generating a sub-pulse width matching-frequency agility transmitted waveform for resisting intermittent sampling forwarding interference. The method provided by the invention can effectively reduce the accumulated gain of the interference signal in segmented pulse compression at the receiving end, and improves the anti-interference and target detection performance of the radar.

The application provides a frequency-adjustable energy selection unit and surface, comprising a three-layer metal unit, a diode combination and a dielectric substrate design, realizes a working frequency agility function based on manual control through an applied bias voltage and an energy selection function controlled adaptively through sensing spatial energy, and has multiple functions of working frequency selection, working frequency band agility and spatial energy selection. The application solves the problem of unadjustable working frequency of the energy selection surface, so that the energy selection surface can not only realize strong electromagnetic protection, but also resist electronic interference, greatly expanding the function of the energy selection surface.

A radio frequency (RF) communications system may include a first RF node that transmits data, including a new frequency of operation, and a sequence of pilot symbols spread with a complex spreading code sequence. A second RF node may receive an incoming signal from the first RF node and perform despreading for N sample offset delays to generate N despreading sequences for the sequence of pilot symbols. The second RF node may perform a cross-correlation to select a desired despreading sequence from the N despreading sequences, determine a phase offset and timing offset, process the incoming signal based upon the desired despreading sequence, phase offset and timing offset, and switch to the new frequency of operation.

The invention discloses a software and hardware design method of a radar frequency agility control system based on an RFSoC, and the method employs a ZYNQ chip and a radio frequency front-end receiving and transmitting assembly to carry out the design of a radar system, and employs an upper computer to carry out the control and transmission of frequency agility parameters. Waveform generation is carried out through a ZYNQ chip, AD / DA conversion is carried out, frequency agility control is carried out through a control radio frequency front-end transceiving assembly, and rapid response to interference changes can be realized through efficient processing and real-time control. According to the RFSoC-based radar frequency agility control system digital signal processing platform, radar waveform generation and inter-frame agility, inter-pulse agility and shield agility of radio frequency can be realized according to radar application scene requirements.

The application discloses a frequency agile method and module based on FPGA control and a quantum sensing system, inputs a clock signal f_1 generated by a constant temperature crystal oscillator into a PLL, inputs a high frequency clock signal f_2 output by the PLL based on input reference signal frequency multiplication into a clock input end of a DDS chip, calculates a frequency control word M based on a frequency control instruction FTW through FPGA, and writes the frequency control word M in binary form into a register corresponding to an n-bit phase accumulator of the DDS chip through a high-speed IO port, and outputs a microwave frequency adjustment signal f_3 according to the clock signal f_2 and the frequency control word M. The FPGA is used as a control core of a frequency source output signal by taking advantages of flexibility and high calculation efficiency, and can complete frequency hopping output in a time scale of ns. In addition, compared with a finished microwave source, the structure is relatively simple, and the hardware cost is greatly reduced.

The invention discloses a frequency agility radar distance and speed parameter estimation method, and belongs to the technical field of radar signal processing. Comprising the following steps: acquiring a frequency agile radar echo signal reflected by a target; performing pulse compression processing on the frequency agility radar echo signal to obtain a pulse pressure frequency agility radar echo signal; dividing a high-resolution distance unit and a speed resolution unit, and constructing a distance-speed dictionary matrix; sampling a pulse compression peak point of the pulse pressure frequency agility radar echo signal to obtain an observation matrix of the pulse pressure frequency agility radar echo signal; based on a Dice coefficient and a generalized regularization sparseness adaptive matching pursuit algorithm, solving a sparse solution vector corresponding to the observation matrix in the distance-speed dictionary matrix; and reconstructing the sparse solution vector to obtain a distance and speed parameter estimation result of the frequency agile radar. The sparse reconstruction theory is introduced, and the performance of frequency agility radar distance and speed parameter estimation is improved.

The application discloses a kind of network-oriented frequency agile radar system's reinforcement learning intelligent interference method, first establish the confrontation scene of multiple radar and jammer, and design a kind of pulse-by-pulse interference, mixed use point interference and sweep frequency interference interference system working model, then the time domain, energy domain resource allocation decision process of interference system when interfering with radar group is modeled as a Markov decision process, and the optimal policy of interference system is solved using deep deterministic policy gradient algorithm to train.This method of the application has strong adaptability and high resource utilization efficiency, compared with the existing interference method for frequency agile radar which depends on specific rules, can significantly enhance the interference efficiency of various configurations of networked frequency agile radar system, tap the task performance of jammer, while using deep reinforcement learning algorithm to optimize combined suppression jamming strategy, improve the strike capability of jammer in electronic countermeasure environment.

The invention relates to the technical field of signal measurement, and particularly discloses a power and spectrum characteristic measurement method based on a pulse modulation signal, which comprises the following steps of: performing parallel acquisition on the pulse modulation signal, and extracting amplitude envelope data and instantaneous phase data; performing numerical analysis on the instantaneous phase data to obtain a carrier frequency deviation value, and comparing the carrier frequency deviation value with a preset frequency point set to generate a carrier frequency matching flag bit; detecting the arrival time of a pulse rising edge according to the amplitude envelope data, and performing combined judgment with the carrier frequency matching flag bit to output a frequency selective trigger signal; dynamically adjusting a center frequency and a gating window of frequency domain measurement according to the trigger signal, and collecting frequency domain spectrum data; carrying out time sequence association on the carrier frequency value, the time domain envelope parameter and the frequency domain spectrum data, and constructing a multi-dimensional association data chain; according to the invention, accurate screening measurement of specific frequency points in the frequency hopping pulse sequence is realized, and the problems of gating mismatch and time-frequency correlation fracture in a frequency agility scene are solved.

The invention provides a low-phase-noise frequency agility frequency synthesizer based on a DDS (Direct Digital Synthesizer). The frequency synthesizer comprises a frequency mixer, the frequency mixer is connected with a C wave band dot frequency source and a P wave band frequency hopping source, and the output of the frequency mixer is output after being filtered and amplified. According to the invention, through the three-stage architecture of the crystal oscillator, the comb spectrum generator and the rapid frequency conversion, the requirements of the system on core indexes of phase noise, spurious suppression, agility speed and the like are met, and a high-reliability local oscillation source can be provided for a high-frequency system; the low phase noise can be effectively ensured by suppressing harmonic distortion based on the comb spectrum generator, the phase jitter problem in frequency synthesis can be significantly reduced based on the design of the P-band frequency hopping source, and by combining the high resolution of the frequency hopping source and the broadband coverage capability of the dot frequency source, the extremely wide range output can be realized, the multi-stage PLL cascade is not needed, and the circuit complexity is significantly reduced.

The invention belongs to the technical field of laser imaging, and discloses a three-dimensional high-speed dynamic microscopic imaging system and method for an ultra-large spliced view field, and the system comprises a frequency agility pulse laser system which is used for separating pulse light into a reference pulse and a measurement pulse, and a wavefront shaping system which is used for strafing a target object by using the measurement pulse, the method comprises the following steps: obtaining a target measurement pulse carrying target object information, carrying out spatial beam combination on the target measurement pulse and a reference pulse, scanning the combined pulse, generating a cross-correlation area array signal, collecting the cross-correlation area array signal by a high-speed collection array system, and generating array data. The signal processing system carries out alignment matching and splicing calculation on the array data and the cross-correlation area array signals, and a reconstruction algorithm is combined to generate a high-resolution spliced image with an ultra-large view field and an ultra-deep depth of field. And high-precision three-dimensional dynamic microscopic imaging with low distortion, high refresh rate and adjustable measuring range under the condition of an ultra-large and ultra-deep field of view is realized.

The invention discloses a frequency agility radar target detection method and system based on a dimension reduction model, and relates to the related field of radar signal processing, and the method comprises the steps: executing the down-conversion processing of an echo signal, carrying out the pulse compression processing of a down-conversion signal, carrying out the constant false alarm rate processing, and extracting a target range gate phase sequence; constructing a diagonal matrix, a distance-dimensional basis matrix, a speed-dimensional basis matrix and a unit diagonal matrix, and configuring a dimension reduction matrix; a semi-secondary splitting method is adopted to convert the dimension reduction matrix into an unconstrained form, then an auxiliary variable matrix is introduced, a distance-speed joint estimation result matrix and the auxiliary variable matrix are initialized, iterative updating is executed until convergence is achieved, and the distance-speed joint estimation result matrix is output; and establishing a radar detection signal, and generating a target detection result. The technical problems that response delay exists in existing frequency agility radar target detection, and the efficiency and practicability of a radar system are affected are solved, and the technical effects of improving the response speed and improving the radar detection efficiency and practicability are achieved.