RFI suppression circuit and method

Details RFI suppression circuit and method RFI suppression circuit and method

1994-08-10

1995-12-05

Sotomayor, John B.

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

Clutter elimination

342101, 342102, 342192, 342 99, G01S 13524

Patent

active

054733324

ABSTRACT:
Improvement of radar sign-to-noise ratio and detection sensitivity in radar systems is achieved by methods employing the subtraction of the unwanted radio frequency interference, RFI, or "clone" signals thereof, from the total received signal. The Clone signals are appropriately adjusted in phase and amplitude, and are obtained from an auxilliary broad beam antenna or from a delayed sample from the system's principal antenna. When multiple RFI signals at different frequencies are present, the entire receive band is subdivided into a plurality of frequency sub-ranges.

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