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A multi-channel based passive detection strategy for high-speed moving target in the airspace under varying interference

Passive radar has shown lots of advantages as compared to active radar and has become a significant branch of bistatic radar. Detection difficulty of non-cooperative reflected signals at very low SNR is a well-known challenge in passive radar, and previous works have mainly studied multi-user co-operative detection based solutions. In this work, we study a passive radar system using the television satellite as illuminator of opportunity(IO), and focus on finding solution for detection challenges caused by time-varying interference and high-speed moving target through improving performance of each single detector. A multi-channel based passive detection strategy is proposed. The proposed method is characterized by sufficient information based fusion and weighted combining. Theoretical analysis and Monte Carlo simulation are conducted to evaluate the performance of our strategy.