Patent ID: 8340225

Claim:
A method for correcting an IQ-imbalance of a complex receiver, comprising: receiving an incoming carrier signal at the complex receiver and generating an in-phase (I) signal component and a quadrature-phase (Q) signal component from the carrier signal; estimating an IQ-imbalance by analyzing the generated I signal component and the generated Q signal component; and compensating for the IQ-imbalance by applying a function of the estimated IQ-imbalance to the generated I signal component and the generated Q signal component to produce a corrected I signal component and a corrected Q signal component; wherein the corrected I signal component (Î) is computed according to a formula I ^ = I ~ ⁡ ( 1 - α 2 ) - Q ~ ⁢ ɛ 2 ; and where the corrected Q signal component ({circumflex over (Q)}) is computed according to a formula Q ^ = Q ~ ⁡ ( 1 + α 2 ) - I ~ ⁢ ɛ 2 ; and where Ĩ is the uncorrected I signal component, {tilde over (Q)} is the uncorrected Q signal component, α is an estimated gain imbalance, and c is an estimated phase imbalance.