An experimental, TDMA-system compatible, LMS adaptive array

An experimental -band satellite simulator has been developed which is equipped with a four-element adaptive (null-steering) receiving array and operates in conjunction with prototype time division multiple access (TDMA) modems developed previously. This simulator performs signal processing operations which result in both the accommodation of multiple (pulsed-envelope) desired signals in time sequence and the suppression of undesired signals when the sources of desired and undesired signals are adequately displaced. Most notably, the composite signals received by the four array elements are processed within an adaptive spatial processor so that the amplitude of a suitable error signal is minimized in a least mean square sense. Overviews of the configuration and performance of the experimental system are presented in this paper.