4results about How to "Improve angular resolution" patented technology

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.

This application provides a channel angle estimation method, apparatus, electronic device, and readable storage medium, comprising: acquiring a discrete beam set of a preset angle domain and the pointing angle, radiation pattern, and received power corresponding to each beam in the discrete beam set; determining a center beam and acquiring the power difference ratio between the center beam and a target neighboring beam, wherein the center beam is the beam corresponding to the larger value of the received power, and the target neighboring beam is one of the adjacent beams surrounding the angle domain of the center beam; mapping the power difference ratio to an angle offset according to the radiation pattern corresponding to the center beam; and correcting the pointing angle corresponding to the center beam according to the angle offset to obtain the estimated angle. This improves the angle resolution while maintaining existing stepping. Furthermore, it only requires amplitude / power data to operate, with low dependence on phase and strict calibration. It also eliminates the need for eigenvalue decomposition or large-scale iteration, facilitating real-time implementation on existing host computers or embedded processors.

This invention relates to the field of millimeter-wave radar technology, specifically to a dual-chip 4D vehicle-mounted millimeter-wave radar antenna array, comprising 6 transmitting antennas and 8 receiving antennas; wherein the transmitting and receiving antennas are arranged in the horizontal and elevation directions in physical space. This invention achieves high aperture utilization of the antenna array through a non-uniform, differentiated array design, while leaving sufficient space for PCB components and RF wiring; through the layout of 6 transmitting antennas and 8 receiving antennas, multiple equivalent arrays can be synthesized in the horizontal and elevation directions using virtual channel technology, improving angular resolution; the layout fully considers grating lobe and sidelobe suppression, effectively improving artifact and interference problems in the target detection process.

This application provides a signal processing method for MIMO millimeter-wave radar. The MIMO millimeter-wave radar includes m transmitting antennas and x receiving antennas, wherein the m transmitting antennas and x receiving antennas are non-uniformly distributed, and m and x are both positive integers. The signal processing method for MIMO millimeter-wave radar includes: randomly controlling the m transmitting antennas to transmit detection signals; calculating the echo signals formed by the reflection of the detection signals from the target object through n virtual receiving channels, wherein the x receiving antennas and m transmitting antennas form n virtual receiving channels, and n is equal to the product of m and x; mixing the reference signal and the echo signal to obtain a processed signal; performing tensor completion on the processed signal to obtain a completed signal; and calculating the target distance, target velocity, and target angle of the target object based on the completed signal. Furthermore, this application also provides a main control device and a MIMO millimeter-wave radar. The signal processing method provided in this application can effectively improve the angular resolution of millimeter-wave radar.