Patent ID: 8184751

Claim:
A method and apparatus for reducing the effects of interference between collocated transceivers, the method comprising: a) matching a time delay of a first received signal in a controlled propagation path to a second received signal over an uncontrolled propagation path; b) continuously and automatically frequency tuning a lobed amplitude slope matching filter (ASMF) applied to the first received signal to allow tracking of the first received signal to match a dynamically changing amplitude slope of the second received signal; c) continuously and automatically tuning a quadratic amplitude matching filter (QAMF) applied to the first received signal to allow tracking of the first received signal to match a dynamically changing quadratic amplitude distortion of the second received signal; d) acquiring a first error measurement signal responsive to an adaptive control loop for adjusting a complex weighting of the delayed coupled first received signal with current match to maximally cancel the propagated second received signal; e) acquiring a second error measurement signal responsive to said step (a) of matching a time delay of the first received signal in a controlled propagation path to the second received signal over an uncontrolled propagation path; f) acquiring a third error measurement signal responsive to said step (b) of continuously and automatically tuning a lobed amplitude slope matching filter (ASMF) applied to the first received signal to allow tracking of the first received signal to match a dynamically changing amplitude slope of the second received signal; g) acquiring a fourth error measurement signal responsive to said step (c) of continuously and automatically tuning a quadratic amplitude matching filter (QAMF) applied to the first received signal to match a dynamically changing quadratic amplitude slope distortion of the second received signal; and h) repeating steps a-g until the first, second, third and fourth error measurement signals are minimized.