2results about How to "Reduce sidelobe level" patented technology

The application provides a radar communication system and receiver joint filter design method and system, the method comprises the following steps: constructing the filter of the working scene of the integrated radar communication system and the JRC-CWG-RF model; when the target and the integrated system move relative to each other in the working scene, the sidelobe performance design optimization criterion is designed according to the filter output of the radar receiving end of the integrated radar communication system; the optimization problem is constructed according to the optimization criterion; the optimization problem is solved by using the AO-KKT-MM algorithm, the constraint parameters of the JRC-CWG-RF model are adjusted, and the filter of the adaptive JRC-CWG-RF model is obtained. The system is based on the above method. By constructing the working scene and the JRC-CWG-RF model, the filter output of the JRC-CWG-RF model has a low sidelobe level, the parameter value of the filter is adjusted according to the constraint, the PAPR of a radar communication system transmission waveform can be effectively limited, the application also realizes radar detection while realizing communication function, and the performance of the integrated system is improved through joint optimization.

The application discloses an air moving target positioning method and device based on a ground-based distributed passive detection system, a medium and a product, and relates to the field of target positioning. The method comprises the following steps: optimizing the layout of receiving stations in the ground-based distributed passive detection system by using a genetic algorithm to obtain an optimal non-uniform receiving station deployment structure; determining a spatial Doppler signal history based on signals radiated by an air moving target and received by each receiving station in the optimal non-uniform receiving station deployment structure; dividing a space to be measured into spatial grids according to slant range, azimuth angle and pitch angle, calculating the theoretical propagation distance of a grid point to a receiving station, and constructing a corresponding theoretical Doppler signal history; performing coherent accumulation on the theoretical Doppler signal history and the spatial Doppler signal history, constructing a spatial positioning cost function, searching for the peak position of the spatial positioning cost function, and determining the position of the air moving target. The application can realize high-precision and high-robustness positioning of the air moving target under the condition of a single fast shot.