Application of adaptive beamforming techniques to HF radar

This paper evaluates the performance of several adaptive beamforming techniques applied to the problem of cancelling interference in a high frequency (HF) radar with transmitter and receiver physically separated by large distances. The difficulties posed by mitigating interference in a HF radar are fundamentally different in many aspects from the adaptive cancellation problem in more conventional phased array radars operating at higher frequencies. Some of the issues specific to adaptive cancellation in HF radar will be addressed in this paper and performance results will be presented using measured data.