System and method for compensation of in-phase and...

Details System and method for compensation of in-phase and... System and method for compensation of in-phase and...

G - Physics

01

S

G01S 7/285 (2006.01) G01S 7/35 (2006.01) G01S 7/40 (2006.01) G01S 13/58 (2006.01) H03D 1/22 (2006.01)

Patent

CA 2054995

A system and method for correcting a gain and phase imbalance between I and Q channels of a synchronous detector. The method of the invention includes the steps of: a) inputting a signal into the detector and extracting therefrom a received signal and a corresponding image signal; b) inputting the received signal in a first Doppler filter; c) inputting the image signal in a second Doppler filter; d) forming a first discriminant; e) forming a second discriminant; f) computing phase (?) and gain (?) errors from the first and second discriminants; g) calculating first and second correction factors based on the phase and gain errors; and h) using the correction factors to correct the phase and gain imbalance errors.

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