Abstract
Self-interference stemming from transmission power leakage to the receiver deteriorates the performance of linear frequency modulated continuous wave (LFMCW) radar. Therefore, how to increase the isolation between the transmitting and receiving antennas becomes a major problem for the improvement of LFMCW radar. In this paper, we adopt a microwave adaptive interference cancellation system based on down-conversion, and propose to use a phase shifter to offset the phase shift caused by the circuit delay and components in the down-conversion circuit, thereby improving the self-interference cancellation ratio. Experiments are conducted to evaluate our methods. The results show that, compared with the traditional delay-based compensation method, our phase-offset based method can increase the interference cancellation ratio (ICR) by 15dB under the condition of wired interference coupling and 10dB under the wireless coupling condition.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
