MULTISTATIC BEIDOU-BASED PASSIVE RADAR FOR MARITIME MOVING TARGET DETECTION AND LOCALIZATION

This paper briefly introduces the basic scheme of a maritime moving target detection and localization method with multiple BeiDou satellites as transmitters. To detect the target and localize it, a receiver local-coordinates is constituted, whose axes are X, Y, and Doppler frequency rate (DFR), and the received echoes from multiple satellites are integrated into the local-coordinates. In this method, first symmetrical keystone transform (SKT) is applied to correct range cell migration (RCM) and set Doppler centroid (DC) to zero. Then, dechirp-FFT is applied to integrate each echo in fast-time and DFR domain. Finally, each DFR integration result is back projected to local-coordinates according to its bistatic range. From the final integration result, target can be detected and localized simultaneously. The effectiveness of the proposed method is demonstrated by simulations.