50results about How to "Improve angular resolution" patented technology

The invention discloses a terrain-combined weather radar base data dynamic resolution three-dimensional structure reconstruction method, which realizes three-dimensional structure reconstruction through combination of a digital elevation model (DEM) and weather radar base data. The method comprises the steps of cutting DEM topographic data and dumping the DEM topographic data into grid data in a binary form, generating a bitmap as a mapping source, establishing an elevation angle index array based on weather radar base data, establishing an azimuth angle index array based on a conical scanning surface so as to quickly map an angle, determining a rectangular reconstruction area and establishing a three-dimensional grid, traversing the three-dimensional grid to obtain an elevation angle, an azimuth angle and a distance combination array of grid points so as to obtain grid point data, smoothing the grid point data, re-sampling terrain grid data, constructing a terrain grid surface, obtaining a mapping image of the terrain grid surface, and rendering a three-dimensional body; the method has the advantages that the method does not need to depend on online service, and dynamic high-precision three-dimensional structure reconstruction of radar echoes in a specified area can be realized while the interaction performance is ensured.

The invention provides an optical lens and electronic equipment with the same. According to the optical lens, a first lens has negative focal power, the first side face of the first lens is a convex face, and the second side face of the first lens is a concave face; the first side surface of the second lens is a concave surface, and the second side surface of the second lens is a convex surface; the third lens has positive focal power, the first side surface of the third lens is a convex surface, and the second side surface of the third lens is a convex surface; the fourth lens has positive focal power, and the second side surface of the fourth lens is a convex surface; the fifth lens has focal power; the first side surface of the sixth lens and the second side surface of the sixth lens have the same surface type; the seventh lens has focal power, and the second side face of the seventh lens is a convex face. The optical lens solves at least one of the problems that an optical lens in the prior art cannot give consideration to miniaturization and high resolution, is poor in pixel, is poor in imaging quality in a dark environment, and cannot be matched with a higher-pixel chip due to poor central angle resolution while meeting a large field angle.

The invention discloses a single-frequency pulse laser source multi-dimensional imaging system and method, and belongs to the technical field of laser radars. The imaging system comprises a single-frequency pulse laser source module, an optical imaging module, a frequency shift and phase modulation module, a time sequence control module and a data processing module, the single-frequency pulse laser source module emits a detection light beam, a first local reference light beam and a second local reference light beam, and the detection light beam irradiates a target to generate a reflection light beam; the time sequence control module controls the three light beams to perform synchronous frequency shift, so that the first local reference light and the reflected light beam are coherent in the optical imaging module to form a holographic image, and the second local reference light beam and the partially reflected light beam generate a beat frequency signal in the frequency shift phase modulation module; the data processing module analyzes the beat frequency signal so as to adjust the initial phase and frequency of outgoing of the detection light beam, and dynamic coherent imaging of the reflected light beam and the first local reference light in the optical imaging module is ensured; and real-time information of the holographic image is analyzed, and a high-quality three-dimensional image is reconstructed.

The invention discloses a magnetoelectric encoder angle value jump point suppression method based on the SWO principle and a related device, and relates to the field of magnetoelectric encoders. According to the method, the multi-antipode angle values are divided into three intervals, the window width is increased, the front-layer window, the current window and the lower-layer window are set, whether the difference value between every two adjacent angle values of the windows of each layer exceeds the set threshold value or not is judged, if yes, it is proved that the jump point exists, and the jump point can be efficiently locked in the mode; according to the method, the SWO algorithm is further combined, the purpose of efficiently suppressing jump points is achieved, meanwhile, the resolution ratio and the precision of the magnetoelectric encoder are remarkably improved, and the encoder can more accurately record and interpret signals and can provide more reliable and accurate data through the improvement.

The invention relates to the technical field of light beam scanning, and provides a galvanometer motor and a laser radar. The galvanometer motor comprises a stator assembly, a rotor assembly, a tunnel magnetoresistance sensor, a first magnet and a second magnet, the stator assembly comprises a shell and a stator body, the rotor assembly comprises a rotating shaft, a rotor magnet and an angle limiting piece, the rotating shaft can be rotatably installed in the shell around a first axis, and a gap is formed between the rotor magnet and the stator body; the rotor magnet rotates around a first axis under the action of a magnetic field of the stator body, and the angle limiting piece enables the rotor assembly to rotate between a first angle and a second angle; the first magnet and the second magnet are spaced from the tunnel magnetoresistance sensor. The first magnet and the second magnet rotate along with the rotor assembly and pass through the tunnel magnetoresistance sensor. Wherein the tunnel magnetoresistance sensor can map a limited angle formed by the first angle and the second angle into a limiting code, so that the angular resolution of the rotor assembly is greatly improved.

The invention relates to a beam control device and a communication-sensing integrated system. The device comprises a plurality of first antenna port groups and at least one second antenna port group, a plurality of first beam channel groups and at least one second beam channel group, the first beam channel groups are connected with the first antenna port group, and the second beam channel group is connected with the second antenna port group; a first signal end and a second signal end, the first signal end is used for connecting a first radio frequency end, and the second signal end is used for connecting a second radio frequency end; the change-over switch is configured to selectively: gate the first signal end to the plurality of first antenna port groups, and gate the second signal end to the at least one second antenna port group; or, gating the first signal end to one part of the plurality of first antenna port groups, and gating the second signal end to the other part of the plurality of first antenna port groups. According to the invention, the sensing function of ISAC can be supported at low cost and high angle resolution on a communication system platform.

The invention discloses a device and method for tracking the angle of a long-distance target object, and the device comprises a laser transmitting and receiving end and a target object, and the laser transmitting and receiving end is disposed on a precise adjustment mechanism. The precise adjusting mechanism is used for bearing the laser transmitting and receiving end and adjusting a laser incident angle to realize continuous tracking of a target; the laser transmitting and receiving end comprises a transmitting module and a receiving module; the transmitting module is used for transmitting a beam of wide-spectrum detection laser with a small divergence angle to a long-distance target object; the transmitting module comprises a wide-spectrum laser and a light beam expanding system, the wide-spectrum laser is electrically connected with the high-stability temperature control and current driving system, and the receiving module comprises an optical receiving module and a data processing and control module. The initial wavelength lambda is taken as the reference in each measurement, no accumulative error exists, and the method is very suitable for long-term and continuous monitoring tasks.

The present invention discloses a phase-type SPR sensing system and application without phase modulation structure. The phase-type SPR sensing system comprises an incident angle adjustment device, an SPR sensing module, a beam splitter, a polarizer, an imaging lens, and a CCD; the beam expansion light excites the SPR sensing module to produce an SPR phenomenon, and the outgoing light carries phase information, which is decomposed into three paths through two beam splitters. After the three light paths pass through the polarizer and the imaging lens respectively, the CCD detects the p-polarized light, the s-polarized light and its 45° polarization interference light intensity. The angle adjustment device adjusts the incident angle to the SPR angle that minimizes the p-light intensity according to the outgoing p-light intensity, and then extracts the phase information according to the light intensity detected by the three CCDs. The present invention adopts an incident angle adjustment device to improve the angular resolution of the phase-type SPR sensor, and at the same time, based on the polarization interference method, respectively detects two polarized lights and their polarization interference light intensities to extract the phase information, and has the characteristics of simple structure, stability, high cost and low cost.

The application provides a solid-state laser radar built in a vehicle headlamp and a point cloud processing method, comprising: a vehicle lamp shell, which is internally separated into an illumination cabin and a radar cabin, and a heat insulation layer is arranged between the illumination cabin and the radar cabin; a solid-state laser radar is arranged in the radar cabin and comprises a VCSEL emission array, a SPAD receiving array and a signal processing and control circuit; a heat dissipation layer is arranged in the radar cabin; based on the above structure, the application provides a solid-state laser radar point cloud processing method built in a vehicle headlamp, wherein the solid-state laser radar is two, a first solid-state laser radar installed in a left front vehicle lamp and a second solid-state laser radar installed in a right front vehicle lamp, which can not only improve the field of view range, but also form a field of view overlapping area in front of the vehicle, so that the point cloud monitoring density and accuracy in the overlapping area are significantly improved.

The invention discloses a direction of arrival estimation method, an integrated circuit, a radio device and terminal equipment. The method comprises the following steps: determining a fuzzy array and a non-fuzzy array in an antenna array; estimating an incident angle of a received signal by using a fuzzy array to obtain a plurality of possible incident angle combinations, the incident angle combinations comprising one or more incident angles; and projecting a plurality of possible incident angle combinations onto the unambiguous array, and determining the incident angle combination corresponding to the maximum energy after projection as the incident angle combination after ambiguity resolution.

The invention discloses a noise elimination method and system based on matrix reconstruction, a terminal and a storage medium, and relates to the technical field of underwater acoustic array signal processing. The noise elimination method comprises the following steps: receiving a sound source signal; establishing a noise-containing data model of the sound source signal; obtaining a data snapshot sample of the sound source signal based on the noise-containing data model, and calculating a sample covariance matrix; performing characteristic decomposition on the sample covariance matrix to obtain a signal subspace and a noise subspace; obtaining a distance relationship between two projection matrixes formed by each column vector in the signal subspace and the noise subspace based on a translation invariant subspace theory, and establishing a diagonal matrix based on the distance relationship between the two projection matrixes; and reconstructing a sample covariance matrix by using the diagonal matrix to realize noise elimination. The method has lower sidelobe, better robustness and overall performance, can adaptively process data, does not need to adjust the diagonal load shedding coefficient, and can improve the angular resolution of a target signal to a greater extent.

A method and apparatus for super-resolution localization of multiple targets using frequency-modulated continuous wave radar includes: determining the number K of targets based on the number of eigenvalues ​​satisfying a condition in the covariance matrix of the acquired radar array signal; finding the frequency values ​​corresponding to the K largest spectral peaks based on the acquired number of targets K, using these frequency values ​​as coarsely estimated intermediate frequency (IF) values, and determining the final IF value using the coarsely estimated IF values; calculating the distance of the corresponding target relative to the center O of the antenna array based on the final IF value; obtaining the noise subspace of the array signal and the steering vector related to the target distance and angle based on the eigenvalues ​​of the covariance matrix of the array signal, constructing a MUSIC spectral function, and determining the estimated value of the target echo signal direction; and then determining the position of the corresponding target. This invention has higher range and angle resolution and lower algorithm complexity, enabling super-resolution localization of multiple targets.

The invention discloses a millimeter wave radar angular resolution testing device and method, and the device comprises a first camera obscura formed by splicing a plurality of second camera obscura, the inner wall of each second camera obscura is provided with a wave absorbing layer, the interior of the second camera obscura at the head end is provided with a mechanical rotary table, a top clamp of the mechanical rotary table is connected with a to-be-tested radar in a clamping manner, and the to-be-tested radar is provided with a wave absorbing layer. An electric arc-shaped sliding rail is arranged in the second camera obscura at the tail end, and a first corner reflector and a second corner reflector are connected to the two movable ends of the electric arc-shaped sliding rail respectively. The method has the advantages that the automobile radar angular resolution test limit can be improved, the method has the advantages of a traditional darkroom scheme, meanwhile, the equipment cost is reduced compared with the traditional darkroom scheme, the box-type scheme further has the advantage of expandability, and the method can be widely applied to measurement of radars with higher angular resolution in the future. The number of the second camera bellows can be increased and the arc guide rail can be replaced on the basis of existing equipment.

The present invention relates to the combination of a rotating scanning ground-based SAR and a fast BP algorithm, and discloses a high-precision imaging scheme for a rotating scanning ground-based SAR based on a fast BP algorithm. In the scheme, the azimuth phase history function and the number of pulse cycles required for the movement across resolution units are first calculated based on the gridded elevation auxiliary data and stored in a data file in the form of a three-dimensional array; secondly, the echo signal sampling data of the monitoring area is recorded by arc rotating scanning, and for each modulation period, the data is subjected to spectrum analysis by FFT and the spectrum is shifted and sorted to obtain the spectrum; for each pixel point, coherent accumulation is performed in azimuth and the cross-resolution unit distance motion correction processing is performed, and finally an arc SAR image of the monitoring area is obtained. The fast BP algorithm in the present invention has a low amount of calculation and storage, and has good adaptability in the case of large-distance motion. Combined with the rotating scanning SAR, it can cover a large range of 360-degree surrounding scenes in one observation, and has high efficiency and wider application.

An azimuth angle determination method, device, electronic equipment and storage medium are disclosed. The azimuth angle determination method comprises: determining a first angle spectrum corresponding to a first group of array elements in an antenna array; determining a second angle spectrum corresponding to a second group of array elements according to the output of adaptive beamforming of the second group of array elements; and determining a target azimuth angle according to the first angle spectrum and the second angle spectrum. Through the above technical solution, different combinations of antenna array elements are used to determine the target azimuth angle according to the angle spectrum of different antenna array elements, angle deblurring is realized, and the problem of angle ambiguity is solved while improving the angle resolution of the sparse array, thereby reducing the requirement for adjusting the grating lobe position through the optimization design of the antenna array element spacing.

The utility model relates to the technical field of millimeter wave radars, in particular to an eight-transmitting and eight-receiving dual-chip 4D millimeter wave radar antenna array, which comprises eight transmitting antennas and eight receiving antennas, and the transmitting antennas and the receiving antennas are arranged in the horizontal direction and the pitching direction in a physical space. According to the utility model, the eight transmitting antennas and the eight receiving antennas are arranged, the transmitting antennas and the receiving antennas are distributed in the horizontal direction and the pitching direction in a physical space according to a certain rule, and the array element coordinates of the transmitting antennas and the receiving antennas are distributed in a differentiated manner according to a preset optimization algorithm instead of being simply and uniformly distributed; therefore, the equivalent array synthesized by the virtual channels has better sidelobe performance and higher angular resolution.

The utility model discloses a 4D millimeter-wave radar antenna array and a 4D millimeter-wave radar, which are applied to the technical field of millimeter-wave radars, a transmitting antenna array comprises a plurality of transmitting array elements, and a receiving antenna array comprises a plurality of receiving array elements; the transmitting antenna array comprises a horizontal transmitting antenna sub-array distributed in the horizontal direction and a vertical transmitting antenna sub-array distributed in the vertical direction, and the receiving antenna array comprises a horizontal receiving antenna sub-array distributed in the horizontal direction and a vertical receiving antenna sub-array distributed in the vertical direction. An antenna aperture with a large size is formed through the MIMO technology, so that the 4D millimeter wave radar antenna array has high angular resolution in both the horizontal direction and the vertical direction.

The invention discloses an MIMO (Multiple Input Multiple Output) arraying method and system for improving angle measurement stability, and the method comprises the steps: respectively generating and obtaining a transmitting azimuth array and a receiving azimuth array, and generating a corresponding receiving and transmitting synthesis array after MIMO based on the transmitting azimuth array and the receiving azimuth array; generating corresponding equally spaced sub-arrays based on the transmit-receive synthetic array; generating and acquiring angle measurement error rate data of a same-distance and same-speed dual-target angle difference within a preset range corresponding to the receiving and transmitting synthesis array, and judging whether the angle measurement error rate data meets a preset value or not; if yes, executing the next step; otherwise, obtaining and judging again; and according to the angle measurement error rate data and in combination with the uniformly-spaced sub-arrays, generating a high-stability and high-resolution MIMO array corresponding to the transmit-receive synthesis array, and ensuring the angle measurement stability while making the FOV larger and larger and the angular resolution higher and higher without increasing the complexity of the algorithm.

The application discloses a millimeter wave radar-based super-resolution angle estimation method, which comprises the following steps: obtaining multi-element sampling data by receiving echo signals of a transmitting antenna by a receiving antenna; adding a Hanning window in a distance dimension and a speed dimension respectively; performing multi-channel non-coherent accumulation to improve signal-to-noise ratio; performing two-dimensional CFAR detection on the two-dimensional matrix data after non-coherent accumulation, performing CA-CFAR detection in the distance dimension and OS-CFAR detection in the speed dimension respectively, and obtaining matrix data containing a target; resolving and aggregating target points in a point trace condensation mode, so as to form a unique target point trace, and saving distance unit information and speed unit information of the target; and estimating a target azimuth by using an improved forward-backward Root-MUSIC algorithm on the multi-element data after compensation. The method considers that the forward-backward direction only uses the covariance matrix on the main diagonal line, and the application has a significant improvement in angle resolution and angle measurement accuracy.

The invention relates to a multi-plane scanner and a method for detecting an object. A multi-plane scanner is presented comprising: a light emitter that emits a light beam toward a monitored area; a light receiver that receives a light beam reflected by an object in the monitored area; an evaluation unit that evaluates a reception signal of the optical receiver; and a polygonal mirror wheel rotatable about a first axis of rotation to periodically deflect the light beam, the polygonal mirror wheel having a plurality of mirror surfaces arranged in a ring shape and at least partially inclined to each other with respect to the first axis of rotation to scan a plurality of angular sections of the monitoring area at different heights, i.e., a plurality of superimposed scanning planes, the light beam deflection unit is arranged between the light emitter and the polygonal reflector wheel as a monitoring area for each turn of the polygonal reflector wheel so as to adjust the incident angle of the light beam to the mirror surface. The control unit is arranged to receive a target trajectory of the light beam in the monitoring area and to control the polygonal mirror wheel and the light beam deflection unit such that the light beam scans the monitoring area along the target trajectory.

The present invention belongs to the field of geophysical exploration technology. The present invention provides a single-hole directional radio frequency electromagnetic detection method and system, including two coaxially arranged directional drilling antennas, the directional drilling antennas have the same structure, and both include a main board, a radiation structure formed by metal is arranged on the main board, and a radially arranged through slot is arranged at the center of the radiation structure; a feed balun is vertically arranged in the through slot, the metals on both sides are not connected, and the metals on each side are respectively connected to the corresponding radiation structure, the main board is arranged on the side of the filling component, the filling component is hollow in the middle, and the feed balun runs through the middle of the filling component; the supporting component is hollow and is provided with a metal reflector, and the end of the metal reflector and the end of the radiation structure are connected by a lumped element. The present invention can effectively improve the detection angle resolution of directional radio frequency electromagnetic in the hole and realize the fine characterization of the abnormality around the hole.

The utility model discloses an optical image rotation lens group and a hard tube endoscope optical image rotation system, the optical image rotation lens group is composed of two separated optical glass lens groups, the two optical glass lens groups are symmetrically arranged, and a diaphragm is arranged between the two optical glass lens groups to form a 1: 1 double telecentric image rotation system; and each optical glass lens group consists of a group of double-bonding Hopkins rodlike lenses which are separately arranged and a group of double-bonding lenses. The double-gluing Hopkins rod-shaped lens is formed by gluing a Hopkins rod-shaped lens L1 and a double-convex optical glass lens L2, the double-gluing lens is formed by gluing a first meniscus optical glass lens L3 and a second meniscus optical glass lens L4, and the concave surface of the first meniscus optical glass lens L3 and the concave surface of the second meniscus optical glass lens L4 both face the position of the diaphragm. The aberration of the hard tube endoscope image rotation lens group is more effectively corrected, the angular resolution of an image rotation system is greatly improved under the condition that the aperture is not changed, and the durability and the imaging quality of the hard tube endoscope are improved.

The utility model provides a camera lens device based on wavefront coding, and belongs to the technical field of optical detection. The camera lens device based on wavefront coding comprises a lens barrel and an industrial camera, the rear end of the lens barrel is connected with the industrial camera, an original infrared lens is installed in the lens barrel, a phase plate is fixed at the front end of the lens barrel, and a diaphragm is arranged between the phase plate and the original infrared lens. A phase plate is added, and the depth of field of the camera is expanded by using an encoding-decoding method, so that the measurement precision of the infrared deflection technology is improved; a wavefront coding method is adopted, so that the system is insensitive to defocus, and coding is realized by adding a phase plate into a camera lens; the phase plate is added, and the depth of field of the lens is expanded, so that in infrared deflection measurement, the camera can clearly image the measured lens and the light source, the position resolution and the angle resolution are improved, and the surface type reconstruction precision is improved.

The invention discloses an underwater target detection and positioning method and system based on a passive sonar array, and relates to the technical field of underwater acoustic signal processing. Acoustic signals radiated by an underwater target are received and divided into dense subarray data and sparse subarray data; performing a sparse Bayesian learning algorithm on the sparse subarray data, and outputting a high-precision fuzzy value; carrying out azimuth estimation on the dense subarray data in a full-angle range through a dense part to obtain a low-precision unambiguous value; and fusing the high-precision fuzzy value and the low-precision non-fuzzy value through an estimation matching model to obtain an orientation estimation result of the underwater target. According to the method, high-precision azimuth estimation is carried out based on the combination of the ternary co-prime array and the compressed grid sparse Bayesian learning, high-precision (but fuzzy) estimation is carried out by utilizing the sparse part of the TCA array, low-precision (but non-fuzzy) estimation is carried out by utilizing the dense part, and high-precision target azimuth estimation under low operand is realized.

The present invention discloses a high-gain automotive millimeter-wave radar array antenna, including a millimeter-wave radar chip interface, a first receiving linear array antenna, a second receiving linear array antenna, a third receiving linear array antenna, a fourth receiving linear array antenna, a transceiver isolation linear array antenna, a first transmitting linear array antenna, a second transmitting linear array antenna, a third transmitting linear array antenna, and a fourth transmitting linear array antenna. The core architecture of the present invention adopts a four-transmit and four-receive antenna array mode, and adopts eight array elements with equal-amplitude angle feed in phase as the transmitting unit, combined with the symmetrical structure of the cut-angle circular polarization and the surface slot combination method, the antenna sidelobe level is reasonably suppressed, the antenna parasitic unit size and position are controlled, the antenna radiation characteristics are optimized, and the impedance matching characteristics are improved. The scheme of the present invention has high precision, high response speed and high resolution, and can have the advantages of high stability, miniaturization and low cost, and can be used for the millimeter-wave radar system scheme for medium-range and long-range detection.

The utility model relates to the technical field of millimeter wave radars, in particular to an eight-transmitting and eight-receiving dual-chip 4D millimeter wave radar antenna array, which comprises eight transmitting antennas and eight receiving antennas, and the transmitting antennas and the receiving antennas are arranged in the horizontal direction and the pitching direction in a physical space. According to the utility model, the eight transmitting antennas and the eight receiving antennas are arranged, the transmitting antennas and the receiving antennas are distributed in the horizontal direction and the pitching direction in a physical space according to a certain rule, and the array element coordinates of the transmitting antennas and the receiving antennas are distributed in a differentiated manner according to a preset optimization algorithm instead of being simply and uniformly distributed; therefore, the equivalent array synthesized by the virtual channels has better sidelobe performance and higher angular resolution.

The present invention discloses an optical lens, which includes, from the object side to the imaging surface along the optical axis, a first lens with negative optical power; a second lens with negative optical power; a third lens with positive optical power; a fourth lens with negative optical power; a fifth lens with positive optical power; a sixth lens with positive optical power; a seventh lens with negative optical power; and an eighth lens with positive optical power. The present invention adopts eight lenses, and through specific surface shape settings and reasonable optical power distribution, especially the first and second lenses adopt negative optical power, the optical lens can collect a wide range of light and improve the field of view of the optical lens. At the same time, by setting the optical lens to have a large positive distortion, the marginal field of view ratio can be effectively increased, and the angular resolution of the marginal field of view can be improved.

The application provides a light beam pointing compensation adjusting mechanism based on a double-axis folding beam structure and a working method, and relates to the technical fields of precise optical instruments and micro-motion devices.The mechanism comprises a fixed unit, an optical deflection unit and a flexible motion unit; the fixed unit is a hollow cylindrical structure; the optical deflection unit is located at the geometric center of the mechanism and comprises an optical fixed cylinder and a V-shaped optical prism group fixed in the cylinder; the optical fixed cylinder is provided with a light transmission hole; the flexible motion unit is arranged between the fixed unit and the optical deflection unit in the circumferential direction and comprises two groups of positive Poisson's ratio structures and negative Poisson's ratio structures arranged oppositely and a moving plate connected with each Poisson's ratio structure; each Poisson's ratio structure is a multi-stage folding beam structure, one end of which is connected with the optical fixed cylinder and the other end is indirectly connected with the fixed unit through the corresponding moving plate. The application simultaneously realizes light path compression, optical-mechanical integrated integration and high-resolution double-axis pointing compensation in a single structure.

The present invention discloses a one-bit sampling DOA estimation method in the presence of array mutual coupling, which belongs to parameter estimation in the field of array signal processing. The present invention is as follows: a uniform linear array composed of M array elements is set, and one-bit sampling is performed on the measured value of each array element; the normalized original covariance matrix is ​​restored by using arcsine law; the guiding matrix structure of the normalized covariance matrix is ​​given by matrix transformation; a sparse vector is constructed by gridding the spatial domain; the influence of the normalized noise matrix on the eigenvalue decomposition is avoided by using the idea of ​​iteration, and an accurate noise subspace is obtained; a weighting matrix is ​​constructed to enhance the sparsity of the sparse vector; and finally a sparse recovery problem is proposed for DOA estimation. Therefore, the present invention greatly reduces the system cost, power consumption and data transmission and storage by using one-bit sampling data, and has the advantages of high estimation accuracy, high resolution, and accurate DOA estimation can be achieved without mutual coupling compensation.

The present invention discloses a car anti-collision radar array antenna, including a four-transmit and four-receive radar chip pad, a first receiving linear antenna array, a second receiving linear antenna array, a third receiving linear antenna array, a fourth receiving linear antenna array, a first transmitting linear antenna array, a second transmitting linear antenna array, a third transmitting linear antenna array, a fourth transmitting linear antenna array, and a transmitting power division matching network. The core architecture of the present invention adopts a four-transmit and four-receive antenna array mode, and adopts six slotted corner-cut patch array elements with the same phase and amplitude as the basic unit structure, controls the size and position of the antenna parasitic unit, reasonably suppresses the antenna sidelobe level and optimizes the radiation characteristics of the antenna, and improves the impedance matching characteristics. The scheme of the present invention can realize the multi-directional detection function of the radar in the horizontal and vertical directions, and has high gain, high precision and high resolution at the same time, and can realize the millimeter wave radar system scheme for long-distance detection.