Bandwidth Performance of a Two-Element Adaptive Array with Tapped Delay-Line Processing.

摘要

We examine the bandwidth performance of a two-element adaptive array with a tapped delay-line behind each element. We show how the number of taps and the delay between taps affect the bandwidth performance of the array. We show that an array with two weights and one delay behind each element yields optimal performance (equal to that obtained with CW interference) for any value of delay greater than zero and less than T(90)/B, where T(90) is the time delay for a 90 deg carrier phase shift and B is the fractional signal bandwidth. Delays less than T(90) yield optimal performance but result in large array weights. Delays larger than T(90)/B yield suboptimal SINR when each element has only two weights. For delays between T(90)/B and 4T(90)/B, the performance is suboptimal with only two taps but approaches the optimal if more taps are added to each element. Delays larger than 4T(90)/B result in suboptimal performance regardless of the number of taps used. (Author)