Robust least squares method for interference cancellation in high frequency surface wave radar

External skywave interference from natural or man-made sources typically masks the entire range-Doppler search space in high frequency surface wave radar (HFSWR), a robust least squares interference cancellation algorithm based on the dual-polar receiver was proposed in this paper. We modify the sample of horizontal auxiliary channel, and get the best performance of interference cancellation in the worst case error circumstance under the limit of maximum error bound while not decreasing the angular response of the target signal. Converting the convex optimization question to simple one dimension search, we get the effective method to settle the optimal weight coefficient. The experimental result shows that the proposed method is very effective.