Howells-Applebaum adaptive superresolution array for accelerated scanning

An approach is proposed that offers an accelerated scanning rate for a Howells-Applebaum adaptive superresolution array (H-A SRA). Analytical considerations clarify the causes of performance degradation of the H-A SRA at a high scanning rate. Then a suitable steering signal and implementation of an H-A weight control loop (H-A loop) for accelerated scanning are introduced. The weight solution determined by this method is shown to coincide approximately with the optimum Wiener one under some specific signal conditions and antenna parameters. Computer simulations show that the H-A SRA gives much better scanning performance than the conventional array. The system is readily implemented by improving the circuit inserting the steering signal in the H-A loop.<
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