Cancellation of specular and diffuse jammer multipath using a hybrid adaptive array

An ideal two-element array that uses bandwidth partitioning in both the main an auxiliary channels, with an Mth-order, adaptive finite impulse response (FIR) filter in each subband of the auxiliary is considered. The ability of this system to cancel specular, moderately diffuse, and diffuse multipath and to perform tradeoffs to determine what combination of bandwidth partitioning and filter order achieves a specified jammer cancellation level with the fewest computations is analyzed. It is demonstrated that specular or diffuse jammer multipath can be canceled to a desired level by using an adaptive array that combines bandwidth partitioning with tapped delay lines. It is found that using three to five taps per subband requires the fewest computations per sample