Moving target imaging for DVB satellites-based passive radar system

This paper studies the passive radar imaging system for moving target based on digital video broadcasting (DVB) satellites. Firstly, the 3-dimensional (3-D) imaging model consisting of multiple DVB satellites and multiple receivers is established. After designing the “receiving stop-go” scheme, we derive the echo in a product-form of the wavenumber domain sampling and the velocity mismatch phase. Through detailed analysis, we come to the conclusion that the whole imaging resolution is limited by the wavenumber domain coverage, and would be seriously influenced by the velocity mismatch phase. Therefore, to reduce the extent of deterioration, we propose the “stop-imaging-go-velocity estimation” (SIGVE) method, which simultaneously recovers the target and estimates its velocity. Simulation results verify the effectiveness of the proposed method.