Method and apparatus for hard-wired adaptive cancellation

Details Method and apparatus for hard-wired adaptive cancellation Method and apparatus for hard-wired adaptive cancellation

1997-03-04

1998-05-26

Sotomayor, John B.

Communications: directive radio wave systems and devices (e.g.,

Clutter elimination

342162, 342194, 342195, 342382, G01S 7292, G01S 734, G01S 13526

Patent

active

057573123

ABSTRACT:
Hard-wired analog adaptive cancellation for microwave receivers to cancel the interference generated by co-located transmitter employs a circuit having two or more quadrature taps on a delay line. The least and greatest delays provided by the delay line taps are selected so that the copies of the transmitted signals provided by the respective taps bracket the timing of the portion of the transmitted signal that leaks into the collocated receiver's input. Samples of received signals corrupted by interference from the transmitter are mixed with delayed samples of a transmission reference signal to develop a cancellation signal.

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