Patent ID: 8588336
Filing Date: 2013-11-19
Classification: H04L

Abstract:
1. A method for compensating an imbalance between an in-phase, I, signal path and a quadrature, Q, signal path of a quadrature receiver adapted to generate a real-valued uncompensated digital I component a(n) and a real-valued uncompensated digital Q component b(n), together forming an uncompensated complex digital signal x(n)=a(n)+jb(n), wherein j denotes an imaginary unit and n is a sequence index, the method comprising: generating a complex compensation signal by filtering one of a(n) and jb(n) with a compensation filter having a complex-valued impulse response; generating a first compensated complex digital signal as the sum of x(n) and the complex compensation signal; and adaptively generating filter parameters of the compensation filter; wherein adaptively generating filter parameters of the compensation filter involves, for each of a number of iterations, where each iteration is identified by an iteration index i: