233 results about "Wideband radar" patented technology

A radar detector is used with a radio link, the radio link characterized by high duty factor operation of a radio transmitter. The radar detector is located a sufficient distance from the radio transmitter that the radar detector is not overwhelmed by the radio transmission signal in that channel and can detect sufficiently low level radar signals to ascertain potential radio interference at the radar from said radio transmitter. The results of the radar detection are communicated to the transmitter in a way that impacts the transmitter's use of the sensed channel. This communication can occur reactively when a radar detection is achieved (the absence of which indicates no radar has been detected) and / or can be a periodic or event-driven indication that the channel is available for operation (the information expiring if the result is not refreshed). A highly sensitive radar detector apparatus that can detect wideband radar signals at very low levels and overcome the disparity of detection range versus interference range is described. A signal detector is also described that detects energy from other users that is not in the operating channel or operating band of the transmitter to determine if the out of band emissions or out of channel emissions of the operating transmitter's signal need to be adjusted through such settings as transmit power, operating channel, filtering, or a combination.

The invention discloses a multi-life monitoring system based on FMCW (frequency modulated continuous wave) wideband radar. The multi-life monitoring system comprises a transmitting unit, a receiving unit, a signal processing unit and a wireless signal transmitting unit; an FMCW signal is transmitted from the FMCW wideband radar to no less than one human object by virtue of the transmitting unit; a reflected echo signal is received by virtue of the receiving unit; the echo signal, which carries vital sign signals, is processed by virtue of the signal processing unit; the vital sign signals are demodulated and separated from the echo signal; and the vital sign signals are transmitted to a computer terminal by virtue of the wireless signal transmitting unit, so that respiration and heartbeat signals of detected persons are monitored under the condition of avoiding contact with the bodies of the detected persons. With the implementation of the multi-life monitoring system disclosed by the invention, under the circumstance of avoiding the contact of any electrodes and sensors with patients, the respiration and heart rates of the plurality of patients can be simultaneously monitored by a long time at a relatively long distance, so that the detected persons can feel more easily and comfortably; the multi-life monitoring system can be widely applied to clinical dynamic monitoring and sleep quality monitoring of patients with severe burn and the like; and meanwhile, the multi-life monitoring system can be also applied to researches in the field of psychology.

The present invention relates to a broadband radar target simulation method and system, characterized in that: the received radar radiation signal enters the broadband down-converter of the simulation system through an attenuator and a low-noise amplifier to perform conversion from radio frequency to intermediate frequency, and the down-conversion output IF 70MHz band-pass signal, 70MHz IF modulation signal is low-pass filtered and then band-pass samples the input analog modulation signal, and the output digital data is digitally down-converted in the FPGA, demodulated to the digital baseband signal and delayed; the delayed The data is output to the IQ data processing circuit of the FPGA, and finally the target simulation in the microwave frequency band is radiated to the radar through the signal output by the DAC. The invention adopts space coherent reception, which can fully meet the requirements of radar far-field testing.

The present invention belongs to the technical field of radar target detection and discloses a range-extended target adaptive detection method under inverse Gaussian texture complex Gaussian clutter for the target detection under a wideband radar system. The method comprises a step of establishing the binary hypothesis model of radar target detection, a step of using a spherically invariant vector process model to construct an inverse Gaussian texture complex Gaussian clutter signal, a step of using a generalized likelihood ratio to obtain a range-extended target adaptive detector under the inverse Gaussian texture complex Gaussian clutter, a step of determining the detection threshold of the adaptive detector, a step of obtaining radar echo data and determining the detection statistic amount of the radar echo data according to the adaptive detector, and a step of judging whether the radar echo data has a range-extended target according to the detection statistic amount and the detection threshold, and if the detection statistic amount is larger than the detection threshold, determining that the radar echo data has the range-extended target, otherwise, determining that the radar echo data has no range-extended target.

The invention discloses a sparse reconstruction-based broadband radar high-speed group-target resolving method, which comprises the following steps: 1, keystone transformation is carried out on broadband radar echo signals of a space high-speed group-target, keystone transformation is realized through chirp-z transformation, and a discrete spectrum SCZT (m, n) of the mth broadband radar echo signal of the space high-speed group-target in a Doppler ambiguity-existing range frequency domain is obtained; 2, a relationship between an observation data matrix XCZT and a range Doppler two-dimensional complex amplitude matrix GMN of the space high-speed group-target is deduced; 3, a relationship between the observation data matrix XCZT and a range Doppler two-dimensional complex amplitude matrix G'(M*L)N of the high-speed group-target between space and time with different Doppler ambiguity times is deduced; 4, a problem of detecting and resolving the high-speed group-target between space and time with different Doppler ambiguity times is converted into a sparse optimization problem, and the range Doppler two-dimensional complex amplitude matrix G'(M*L)N of the high-speed group-target between space and time with different Doppler ambiguity times is obtained; and a range Doppler plane of the space high-speed group-target is drawn, and coherent accumulation and resolution of the space high-speed group target can be realized.

The invention provides a method for detecting a broadband radar on the basis of continuous high-resolution target distance image-correction correlation matrix, and the method comprises the following steps: (1) standard deviation estimation is carried out to the noise of distance images that contain noise; (2) based on the standard deviation, a set of non-linear contraction mapping is established, and then the distance images that contain noise are refined according to the contraction mapping, thus obtaining refined multi-pulse distance images; (3) based on the multi-pulse distance images, cross correlation coefficient between every two refined distance images is calculated, thus obtaining a corrected cross correlation coefficient matrix; (4) the cross correlation coefficient matrixes are accumulated to establish the detecting statistic value, and the detecting threshold of current noise variance is set; (5) the detecting statistic value and the detecting threshold are compared to judge whether the target exists. The method has the advantages of cross distance unit detection and multi-pulse accumulation and is used for detecting a non-cooperative target under unknown prior information condition.

The spurious-free dynamic range of a wideband radar system is increased by apportioning de-ramp processing across analog and digital processing domains. A chirp rate offset is applied between the received waveform and the reference waveform that is used for downconversion to the intermediate frequency (IF) range. The chirp rate offset results in a residual chirp in the IF signal prior to digitization. After digitization, the residual IF chirp is removed with digital signal processing.

The invention discloses a recognizing and classifying method for broadband radar interference signals. The method comprises the following steps of S1, obtaining radar interference signals, processingthe signals, and obtaining digital video signals; S2, performing short-time Fourier conversion on the digital video signals, and obtaining a time frequency matrix; S3, according to a ranking statistics constant false-alarm method, processing the time frequency matrix, and obtaining a constant false-alarm detection matrix; S4, calculating parameters of interference signals in the constant false-alarm detection matrix, and integrating the parameters of the interference signals into a signal parameter matrix, and obtaining an interference signal detection result; S5, according to the interferencesignal detection result, calculating interference signal characteristics; S6, according to the interference signal characteristics, recognizing and classifying the interference signals. According tothe interference-based time-frequency signal characteristics, nine broadband radar interferences are recognized and classified, and the method has the capability of multi-interference (non-overlappedon frequency) classifying and recognizing.

The invention provides a soil water content measuring method based on an ultra wideband radar, and belongs to the field of soil water content measuring. The soil water content measuring method based on the ultra wideband radar is provided for solving the problems that a traditional soil water content measuring method is poor in real-time performance, and the area of soil measured in a one-off mode is small. The soil water content measuring method based on the ultra wideband radar mainly includes the steps that the ultra wideband radar is adopted for collecting radar data to estimate an ultra wideband multi-path channel of the soil; parameters, such as the range and the delay spread, of the multi-path channel are analyzed, and statistical properties of the multi-path channel are analyzed; the relationship between water content and the statistical properties of the multi-path channel is set up; according to the corresponding relationship, the water content of the target soil is measured. According to the soil water content measuring method based on the ultra wideband radar, the soil water content can be accurately monitored in real time without destruction; the soil water content measuring method based on the ultra wideband radar is suitable for farmland, and particularly the soil can be monitored in real time in a large scale after networking is achieved.

The invention discloses a radar based respiration and heartbeat signal detection method and system. The method comprises the steps of A, judging whether a target exists based on a transmitting signaland a receiving signal; and B, performing the following processing on a mixed vital sign signal of the target: B1, performing high-pass filtering and FFT on the mixed vital sign signal to obtain firstfrequency spectrum data; B2, if the frequency corresponding to a maximum amplitude value point is within a respiratory frequency range and the maximum amplitude value point exists at a Q frequency doubling position and / or near the Q frequency doubling position of the frequency, taking the frequency as a respiratory dominant frequency; B3, decomposing the mixed vital sign signal of the target based on empirical wavelet transform; and B4, if the maximum value frequency of a third component or a fourth component is within a preset heartbeat frequency range, taking the maximum value frequency asa heartbeat dominant frequency. Based on the empirical wavelet transform, respiration and heartbeat signals are adaptively separated and the frequencies of the respiration and heartbeat signals are accurately extracted, and the respiration and heartbeat frequencies of multiple persons can be simultaneously extracted and separated for a broadband / ultra-wideband radar.

Disclosed in the invention is a full-coherent X-waveband broadband radar object simulator comprising a radar signal generator, an up conversion assembly, an X-waveband fiber delay device, a digitally controlled attenuator and a frequency synthesizer. The output terminal of the frequency synthesizer is connected with the input terminal of the radar signal generator and the input terminal of the up conversion assembly; the output terminal of the radar signal generator is connected with the input terminal of the up conversion assembly, the input terminal of the X-waveband fiber delay device, and the input terminal of the digitally controlled attenuator; the output terminal of the up conversion assembly is connected with the input terminal of the X-waveband fiber delay device; and the output terminal of the X-waveband fiber delay device is connected with the input terminal of the digitally controlled attenuator. According to the invention, with cooperation of the existing radar signal generator, various intermediate-frequency signals needed by the modern radar system can be generated and a full-coherent large-broadband radar object echo radio-frequency signal with high simulation quality and excellent fidelity can be simulated. And the simulator can be applied to debugging and performance detection of a radar receiving sub machine and a signal processing sub machine.

The invention refers to a method and device for wideband radar, the method comprising: generating a wideband signal (1, 6) with a bandwidth B; copying the wideband signal (1, 6); transmitting the wideband signal (6′); receiving a returned echo signal (11) from the transmitted signal (6′); dividing the copied signal into a number, Nf, of subsequent frequency bands b; manipulating the copied and divided signal into an anticipated signal (10) by adding a number Nd of anticipated delays and a number of ND Doppler stretches to the copied and divided signal for each Nf subsequent frequency band b; dividing the received signal (17) into a number, Nf, of subsequent frequency bands b; correlating corresponding frequency bands in the divided received signal (17) and the anticipated signal (10) giving NdND correlated signals (19) for determining range (R) to a target and velocity (v) of the target.

The invention provides a wideband radar cross-section reduction slot array antenna based on hybrid super-surface. The antenna comprises a lower dielectric plate (1) and an upper dielectric plate (2),wherein second and third dielectric plates (3, 4) are sequentially and closely attached above the upper dielectric plate, and fourth, fifth and sixth dielectric plates (5, 6, 7) are sequentially placed at different intervals above the third dielectric plate; the upper surfaces of the second and third dielectric plates are respectively printed with L-shaped metal patch units (31, 41) in checkerboard type arrangement; the lower surface of the fourth dielectric plate is respectively printed with an impedance structure (51) and a metal patch unit (52) in checkerboard type arrangement; the lower surface of the fifth dielectric plate (6) is printed with a plurality of strip metal patches (61); and the upper and lower surfaces of the sixth dielectric panel (7) are respectively printed with the metal patch unit (52) and the impedance structure (51) in checkerboard type arrangement. The wideband radar cross-section reduction slot array antenna has good scattering characteristics and realizes effective reduction of the cross-band single-station and double-station radar cross sections in the slot array antenna.

The invention discloses a broadband radar target complex echo de-noising method based on sparseness constraints. The method comprises the steps of (1) obtaining a target complex distance image, (2) determining a coefficient vector and a penalty factor, (3) constructing a de-noising performance evaluation function, (4) updating the coefficient vector, (5) judging whether a relative error is larger than an error threshold or not, (6) restoring the complex distance image. According to the broadband radar target complex echo de-noising method based on the sparseness constraints, by the adoption of the super-resolution Fourier base, the signal to noise ratio of broadband radar target complex echoes can be better improved, and the broadband radar target complex echo de-noising method can be used for conducting noise suppression on the radar echoes of moving objects such as airplanes and automobiles under the noise background.

The invention provides an ultra-wideband radar signal generating and synthesizing device, which comprises a bus control communication module, an ultra-wideband waveform generating module and a simulated correction signal generating module, wherein the bus control communication module receives a control instruction and generates waveform control signals; the ultra-wideband waveform generating module comprises an FPGA and a DAC, the FPGA generates multichannel parallel digital signals according to the received waveform control signals and clock signals, and the DAC receives the parallel digital signals, carries out parallel-serial conversion to synthesize high-speed DDS data, and carries out analog-digital conversion to output radar signals; and the simulated correction signal generating module receives the ultra-wideband radar signals and outputs simulated correction signals of a sum channel and two difference channels. The generated ultra-wideband signals are synthesized by adopting a digital mode, and a hardware circuit is simple in structure.

In some aspects, the disclosure is directed methods and systems for establishing a wideband radar system for imaging. A receiver of a radar imaging system may receive a set of phase measurements for each of a plurality of frequency bands, each of the plurality of frequency bands established by up-converting or down-converting a base frequency band. A phase adjuster of the radar imaging system may identify, from each region of overlap between consecutive frequency bands of the plurality of frequency bands, a phase difference between corresponding sets of the phase measurements. The phase adjuster may adjust one or more sets of the phase measurements based on the identified phase differences to generate an image across the plurality of frequency bands.

The invention discloses an optical transparent ultra-wideband radar and infrared double-stealth structure, and relates to the technical field of multi-spectrum stealth, and the stealth structure mainly comprises a low-emissivity infrared stealth layer and an ultra-wideband radar wave-absorbing layer. In order to realize high transmittance of visible light, an optical transparent material transparent conductive film and a transparent dielectric are selected in the overall structural design; the radar wave-absorbing layer adopts a conductive film-medium-conductive film sandwich type wave-absorbing structure; the transparent conductive film is etched into a frequency selective surface by adopting a laser etching process to finish the preparation of the radar and infrared compatible stealth material; the optical transparent ultra-wideband radar and infrared compatible stealth material has high designability, the contradictory problem of optical transparency, radar stealth and infrared stealth can be well solved from the perspective of structural design by adopting a metamaterial technology, and the optical transparent ultra-wideband radar and infrared compatible stealth material has good ultra-wideband radar wave absorption performance, low infrared emissivity and optical transparency.

The invention discloses a layered broadband radar absorbing plate. The absorbing plate is a multilayer absorbing film. The multilayer absorbing film has five layers which are a first layer of a spherical carbonyl iron film, second and third layers of flaky carbonyl iron films, fourth and fifth layers of sheet Fe-Si-Al films from top to bottom in sequence. The invention also discloses a manufacturing method of the above-mentioned absorbing plate. The layered broadband radar absorbing plate of the present invention utilizes the principle of electromagnetic matching, the stress orientation technology, and the production technology of coating, rolling and vulcanization comprehensively. The finished product is characterized by high microwave absorption rate, a wide absorption frequency band, athin thickness, small surface density, high elongation at break, strong adhesion, high and low temperature resistance, flame retardance, easy usage, etc., and has wide application prospects in microwave stealth transformation of radar, communications equipment, satellite navigation, electrical equipment, notebooks, base stations, medical equipment and other electronic industries and weapons and equipment, and especially the stealth transformation of aerospace vehicles.

The invention relates to a target feature extraction method for one-dimensional imaging of a target by using a broadband radar. The target feature extraction method is used for solving the problems that the target features of a sea target are easily unstable under the influence of sea clutters when the sea target is subjected to broadband imaging, and the like, caused by the fact that the current broadband radar one-dimensional imaging method for the target mainly acquires the electromagnetic scattering characteristics of the external shape of the target. In order to obtain more stable identification results, a one-dimensional high-resolution distance feature extraction algorithm is provided by the technical scheme adopted by the invention, so that the accurate extraction of one-dimensional image features is realized, the discrimination and identification of one-dimensional broadband images of the sea target are realized. The target feature extraction method comprises the following specific steps of: judging the correctness of one-dimensional imaging data of the target so as to eliminate singular values which affect data computed results; accurately judging imaging starting and ending positions of the target so as to provide a basis for the judgment of target size and a support for back-end processing; and carrying out extraction and computation on numerical features of the target. The target feature extraction method provided by the invention has the advantages that the difficult problem in extraction of identification features of the target is solved, and a technical support for identification of broadband images of the target is provided.

The invention belongs to the technical field of unknown target recognition, and particularly relates to an unknown target recognition method based on a deep convolutional neural network. The method comprises the following steps: firstly, preprocessing one-dimensional range profile data (HRRP) obtained by a broadband radar to reduce the amplitude sensitivity of a one-dimensional range profile; secondly, extracting features by using a deep convolutional neural network; and finally, processing the recognition probability of the known target data through a difference probability method, obtaininga discrimination threshold, and discriminating the output vector of the neural network, thereby recognizing an unknown target. According to the method, the discrimination threshold acquired by adopting the difference probability method is introduced, so that the statistical distribution region boundary of the known target and unknown target data sets is effectively described, and the problem thatthe conventional convolutional neural network cannot identify the unknown target is solved.

The invention discloses a broadband radar three-dimensional interference measurement cone target fretting parameter estimation method. The method comprises steps that a transmitting-receiving integrated antenna A, a receiving antenna B, and a receiving antenna C are determined, and an interference phase difference between the transmitting-receiving integrated antenna A and the receiving antenna Bon a kth scattering center and the interference phase difference between the transmitting-receiving integrated antenna A and the receiving antenna C on the kth scattering center are acquired: k is anyone of a set number of scattering centers, which are disposed on a cone target; the reconstruction x axis coordinate curve of the kth scattering center after smoothing processing, and the reconstruction y axis coordinate curve of the kth scattering center after the smoothing processing, and the reconstruction z axis coordinate curve of the kth scattering center after the smoothing processing aredetermined, and then after the precession frequency estimated value <^>f<c> of the cone target, the angle of precession estimated value <^>Theta of the cone target, the half cone angle estimated value<^>Eta of the cone target, the height estimated value <^>H of the cone target, and the bottom surface radius estimated value <^>r of the cone target are acquired, a broadband radar three-dimensionalinterference measurement cone target fretting parameter estimated result is acquired.

The invention discloses a broadband radar data fusion method based on a rapid sparse Bayesian learning algorithm. Modeling is performed on data via adopting a geometrical theory of diffraction by aiming at multiband scattered field data of multiple radars which are distributed in a same place so that a problem of radar data fusion is converted into the problem of sparse expression, and the problem of sparse expression is solved by utilizing the rapid sparse Bayesian learning algorithm. Firstly extrapolation is performed on sub-band data of different radars so that overlapping frequency band data are obtained. Then coherent registration is performed on the sub-band data of different radars according to the overlapping frequency band data. Finally, frequency band extrapolation and interpolation is performed by utilizing the sub-band data after coherent registration so that ultra broadband data are obtained, and distance direction resolution of the radars is enhanced.

The invention belongs to the technical field of electronic countermeasures, and discloses a multi-false-target interference method for broadband radar based on single-bit quantization; the method comprises the following steps of: performing down-conversion processing on intercepted radar signals, and performing sampling and single-bit quantization on intermediate-frequency radar signals after down-conversion to effective reduce the requirement of a radar signal on a storage space; then, carrying out convolution operation on the single-bit quantized radar signal and a pre-generated modulation signal, so that interference signals corresponding to a plurality of false targets can be generated; and finally, according to the time sequence requirements of the receiving period and the transmitting period of the intermittent sampling technology, using a transmitting and receiving time-sharing system to carry out intermittent receiving and interference signal transmitting on the radar signals to solve the problem of interference signal lag and increase the number of false targets of the LFM radar. The method can generate a plurality of distance direction false targets for a radar adopting linear frequency modulation (LFM) signals, and has the advantages of small calculation amount, high calculation efficiency, real-time processing and the like.

The invention discloses a detection method and a radar device for detecting life in a vehicle. The method comprises the following steps: S1, detecting the inside of a target vehicle by using an ultra-wideband radar, and receiving an echo signal of the radar; and S2, performing target detection on the extracted echo signal, determining the position of the outer wall around a vehicle body during thetarget detection, intercepting an internal area of the vehicle from the determined position to obtain an effective detection area, filtering a false alarm target outside the effective detection areafrom the detected target, and outputting a final target detection result. The detection method and the radar device have the advantages of simple detection implementation, high efficiency, capabilityof suppressing false alarms, high detection precision and the like.

The invention provides an ultra-wideband radar human body target attitude visualization enhancement method and aims to solve problems that a traditional ultra-wideband radar human body imaging resultis relatively abstract, low in resolution and difficult to visually understand. The method comprises steps of firstly, carrying out three-dimensional imaging of a detection scene; detecting the position of a human body target, and obtaining the imaging result of the human body target; performing feature extraction of a radar image corresponding to the human body target by using a resnet network; converting a feature matrix into probability distribution of human skeleton points by using a headnet network; and lastly, extracting position coordinates of the human skeleton points by using a soft-argmax function, and connecting and displaying the coordinate points to obtain a visual three-dimensional attitude graph of the human target. The method is advantaged in that the three-dimensional human body posture is estimated from an abstract three-dimensional radar image by means of a deep neural network tool, visualization performance of ultra-wideband radar human body target detection is enhanced, and a user is assisted in interpreting the posture of the human body target with higher precision.

The invention relates to an ultra-wideband radar target echo signal simulation method and a simulator based on a dynamic reconfigurable DRFM, which belong to the technical field of radars. By adoptingthe method and the simulator disclosed in the invention, dynamic configuration of the sub-channels is realized through dynamic estimation, therefore, full-channel processing is not required to be performed on the ultra-wideband radar transmitting signal, the dynamic utilization of hardware resources is optimized, further, on the basis of an existing hardware platform, high-fidelity dynamic reconstruction is carried out on different application scenes through an amplitude-phase compensation technology, so that dynamic reconfigurable DRFM-based ultra-wideband radar target echo simulation oriented to the ultra-wideband radar is realized, and the implementation method is simple and convenient, wide in application range and relatively low in implementation cost.

The invention provides an ultra-wideband radar single-channel digital beam forming method based on a space-time coding array, and aims to reduce the sidelobe level of the distance dimension and the angle dimension of a DBF output signal and improve the precision and the angle resolution of a beam pointing angle. The method comprises the following implementation steps of constructing a space-time coding array; obtaining a digital baseband signal based on the space-time coding array; performing pulse compression on the digital baseband signal; performing Fourier transform on the signal obtainedby pulse compression; performing Keystone transform on the frequency domain signal; setting frequency domain equivalent DBF algorithm parameters; and obtaining an ultra-wideband radar digital beam forming result based on a frequency domain equivalent DBF algorithm. According to the ultra-wideband radar single-channel digital beam forming method provided by the invention, the space-time coding array is constructed, and spatial coding is carried out on the array spatial domain signal, so that the sidelobe level of the distance dimension and the angle dimension of the DBF output signal is effectively reduced, the ultra-wideband radar digital beam forming result is obtained based on frequency domain equivalence, and the precision and the angle resolution of the beam pointing angle are effectively improved.

The invention discloses a wideband radar aperture transit effect adaptive compensation method. By means of the method, the aperture transit time difference can be adaptively compensated. The method takes a Chirp signal as a transmitting signal, and specifically comprises the following steps of receiving a target echo signal by a phased array radar; according to the transmitting signal, generatinga dechirped reference signal; performing frequency mixing and low-pass filtering on the target echo signal and the reference signal, wherein the processed echo signal adopts a wideband scattering point model, namely, the processed echo signal is formed by superposing echoes of target scattering points; selecting a reference subarray in the phased array radar, performing cross correlation operationon dechirped data of paths of other subarrays except the reference subarray and dechirped data of the reference subarray, and estimating the aperture transit effect compensation values of the paths of other subarrays according to a cross correlation operation result; and compensating the aperture transit time by adopting the calculated aperture transit effect compensation values of the paths of other subarrays.

The invention discloses a range-spread target polarization adaptive detection method without auxiliary data under a wide-band radar system. The problem that in the prior art, on the condition that the auxiliary data do not exist, detection performance is severely damaged is mainly solved. The method comprises the steps that 1, radar target detection is described by means of a dualism hypothesis, and clutter signals of all polarization channels are built according to an autoregression AR model; 2, a probability density function of a detection signal under the condition that a target exist is obtained according to the clutter signals represented by the autoregression AR model; 3, an unknown parameter is estimated according to the probability density function; 4, by means of a Wald detection method and an estimated value of the unknown parameter, a range-spread target polarization adaptive detector without the auxiliary data is obtained; 5, a detection threshold gamma of the detector is determined through a Monte Carlo experiment; 6, a detection result is obtained by bringing radar echo data into the detector. According to the range-spread target polarization adaptive detection method without the auxiliary data, on the condition that the auxiliary data do not exist, the detection performance to a wide-band radar target can be improved.

A precession cone target parameter extraction method under a foresight condition comprises the following steps: (1) constructing a radar observation model, obtaining scattering point echoes of a precession cone target, multiplying an echo signal by a phase compensation function Scom (tm), and eliminating a micro-Doppler component brought by rotation of an antenna; applying an EMD method to the echo signal after phase compensation to obtain a plurality of intrinsic mode functions (IMFs), extracting each IMF frequency, and realizing effective estimation of a target coning frequency; (2) carrying out time-frequency analysis on the echo after phase compensation to obtain a micro-Doppler curve, and carrying out skeleton extraction on the curve to improve the estimation precision; a broadband radar is arranged at the original point, a high-resolution one-dimensional distance sequence of scattering points is obtained, and geometric parameters and motion parameters of the precession cone target are jointly estimated by combining the coning frequency, the high-resolution one-dimensional distance image and the peak value of the micro-Doppler curve obtained in the above steps. The method can overcome the defect that a single-base radar cannot effectively extract the target micro-Doppler parameters under the condition that the micro-motion plane is perpendicular to the radar sight line direction.