Cascade preprocessors for adaptive antennas

Adaptive preprocessing networks placed ahead of the main adaption circuits of an adaptive antenna can be arranged to resolve the input signals into their eigenvector components. As such, they have the capability of materially improving the convergence rates in certain cases. This is true even when the solution for the eigenvector components is only approximate. Although the preprocessor involves additional hardware, the demands on the main processor are eased, and in some cases, we may dispense with the main processor.