Patent ID: 8391431

Claim:
A receiver having improved interference suppression comprising: a first receiver filter; and an input noise whitening filter adapted to selectively add whitening to a received signal coupled from said first receiver filter comprising: an autocorrelation estimator adapted to accept a noise estimate signal derived from said received signal, calculate a first autocorrelation function from said accepted noise estimate signal, and determine an autocorrelation function from an absolute value of said first autocorrelation function, a filter characteristic selector adapted to receive said autocorrelation estimate, compare said autocorrelation estimate to a threshold value, and select a non-unitary, white noise additive, filter characteristic when said autocorrelation estimate is above said threshold value and select a unitary filter characteristic when said autocorrelation estimate is below said threshold value, and a selectable filter, responsive to said filter characteristic selector to recover an output signal having informational content from said received signal as modified by said selected filter characteristic.