Patent ID: 7061994

Claim:
A system for performing in-phase and quadrature phase signal imbalance compensation on an input in-phase signal I 1 and an input quadrature phase signal Q 1 to produce a processed in-phase signal I 2 and a processed quadrature phase signal Q 2 , the system comprising: a phase imbalance correction coefficient generation circuit for generating a phase imbalance correction coefficient x from a plurality of previously processed in-phase and quadrature phase signals, said previously processed in-phase and quadrature phase signals corresponding to transmitted symbol values from a symbol constellation including a plurality of different symbol values distributed around an I/Q origin, said transmitted symbol values being distributed symmetrically around said I/Q origin over time; an amplitude imbalance correction coefficient generation circuit for generating an amplitude imbalance correction coefficient K from at least some of said plurality of previously processed in-phase and quadrature phase signals; an imbalance compensation device having an input for receiving said received signals I 1 and Q 1 and an output for outputting said processed signals I 2 and Q 2 said output being coupled to an input of said phase imbalance correction coefficient generation circuit and said amplitude imbalance correction coefficient circuit, said imbalance compensation device including: a module for generating said processed signals I 2 and Q 2 from said received signals I 1 and Q 1 according to the following equation: I 2 =I 1 +Kx×Q 1 ; and Q 2 =xI 1 +KQ 1 .