Echo Interference Suppression Approach for Doppler Through-Wall Radar

Because of the particularity of through-wall radar (TWR) applications, TWR often operates in a complicated environment, which can lead to severe interferences in the received echo and thus hamper the accurate target detection. To solve the issue, in this paper, an echo interference suppression approach, which combines hardware and algorithm process, is proposed for Doppler TWR. Compared with the traditional methods, which mainly based on the fixed filter parameters, the proposed approach takes advantage of feedback structure and microcontroller to intelligently adjust the filter parameters according to the real-time interference variation and thus achieves not only more effective, but also more stable interference suppression performance even in a dynamic environment. Series of experimental measurements are presented to illustrate the performance of the proposed techniques.