Topology Design for Distributed Radar Imaging Based on Wavenumber Domain Splicing Analysis

Distributed radar is more flexible because of transmitters and receivers are separately distributed in this system. It can form multiple bistatic SAR systems according to the detection requirements in a self-organized manner, and obtain more effective information in a shorter time. During the movement of the radar platform, a specific spatial spectrum will be generated in the wavenumber domain. By splicing the spatial spectrum of multiple bistatic SAR systems, the resolution in the range direction or cross range direction can be improved. In this paper, the rule of spatial spectrum distribution in the wavenumber domain is analyzed in detail, and a method is provided for the topology design of radar platforms in combination with the splicing spatial spectrum. Numerical simulation gives imaging results after topology design, which demonstrates the effectiveness of distributed radar topology design method for improving range or cross range resolution.