A direct-path interference cancellation approach to passive radar based on adaptive fractional delay estimation

作者：Zhu Jiabing; Wu Xianliang; Tao Liang; Hong Yi

来源：Chinese Journal of Electronics, 2007, 16(2): 359-362.

• Direct path interference (DPI) cancellation
• Adaptive fractional delay estimation (AFDE)
• passive radar

Target detection by non-cooperative illuminator is a study hotspot in electronic warfare field, with 'four countering' potential advantages for passive radar. One of the major problems in continuous wave bistatic radar is Direct path interference (DPI). Conventional solutions to this problem is the use of an adaptive antenna, steering null towards the interference. Unfortunately the null depth obtained by this technology is not enough for surveillance radar. First of all, DPI appeared in passive radar based on non-cooperative FM broadcast transmitter is analyzed in this paper. Secondly, a DPI cancellation based on Adaptive fractional delay estimation (AFDE) is in detail introduced how to deal with this problem. Finally, a passive radar experimental system based on non-cooperative FM broadcast transmitter is provided, simulation results by real collected data show applying the method proposed in this paper is effective in suppression DPI.

• 出版日期2007-4
• 单位中国电子科技集团公司第三十八研究所; 安徽大学