In recent years, the frequency diverse array (FDA) radar concept has attracted extensive attention, as it may benefit\nfrom a small frequency increment, compared to the carrier frequency across the array elements and thereby achieve\nan array factor that is a function of the angle, the time, and the range which is superior to the conventional phase\narray radar (PAR). However, limited effort on the subject of FDA in electronic countermeasure scenarios, especially in\nthe presence of mainbeam deceptive jamming, has been published. Basic FDA is not desirable for anti-jamming\napplications, due to the range-angle coupling response of targets. In this paper, a novel method based on subarrayed\nFDA signal processing is proposed to counteract deceptive ECM signals. We divide the FDA array into multiple\nsubarrays, each of which employs a distinct frequency increment. As a result, in the subarray-based FDA, the desired\ntarget can be distinguished at subarray level in joint range-angle-Doppler domain by utilizing the fact that the\njammer generates false targets with the same ranges to each subarray without reparations. The performance\nassessment shows that the proposed solution is effective for deceptive ECM targets suppression. The effectiveness is\nverified by simulation results.
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