High efficiency echo data acquire approach for bistatic SAR

Focusing on the issue of echo data acquire approach in bistatic SAR system. In this paper, the key technology of echo sampling window synchronization is introduced, the effect of echo sampling window synchronization error to the echo data and image performance are analyzed, an adaptive echo sampling window synchronization approach based on amplitude demodulation and phase compare is proposed, which could automatically adapt for the echo pulse repeat interval(PRI), and establish a high accurate synchronized echo sampling window, then a high precise phase bias compare algorithm for the proposed approach is introduced. At last the performance and residual error for the presented approach are analyzed to illustrate the efficiency of the proposed approach. This paper provides a theoretical and engineering reference for the design of echo sampling window synchronization in bistatic SAR system.