Target Detection With Uniformly Distributed Subarrays In The Presence Of Mainlobe Jamming

Target detection in the presence of mainlobe jamming (MLJ) is a challenging task for radar signal processing. Spatial filtering techniques for MLJ cancellation on uniform linear array (ULA) have been proposed recently. However, the performance of these techniques degrades greatly when MLJ is located close to target. To solve this problem, we propose a sparse detection method on uniform distributed subarrays, which can achieve higher detection performance by arranging large subarray spacing. The detection result from a single time measurement will be ambiguous, which can be solved by Chinese reminder theory on the measurements under multiple co-prime carrier frequencies. Simulations are provided to corroborate the theoretical studies.