Improved scheme for clutter rejection and DOA estimation in passive radar

Abstract

Targets are hard to be detected by passive radars unless clutter, namely direct-path signal and multi-path signal, is suppressed. The subcarrier-based spatial adaptive processing is a high-performance spatial-domain clutter rejection algorithm. It may have adverse influence on the direction of arrival (DOA) estimation. The study analyses the influence theoretically and proposes an improved processing scheme to avoid the influence. Experimental results using real data validate the proposed scheme.

Keywords

• clutter
• radar signal processing
• passive radar
• direction-of-arrival estimation
• radar clutter
• ofdm modulation
• high-performance spatial-domain clutter rejection algorithm
• adverse influence
• arrival estimation
• doa
• improved processing scheme
• passive radar
• direct-path signal
• multipath signal
• subcarrier-based spatial adaptive processing