Patent ID: 7609772
Filing Date: 2009-10-27
Classification: H04L

Abstract:
1. An apparatus for optimally compensating in-phase/quadrature-phase imbalance in a zero-intermediate frequency (IF) orthogonal frequency division multiplexing (OFDM) receiver, comprising: a first compensator for generating a first received symbol by eliminating an interference component caused by a second distorted symbol on an (N a first hard decider for generating a first compensated symbol by performing a hard decision on the first received symbol; an error calculator for generating an error symbol by subtracting the first compensated symbol from the first received symbol; a second compensator for generating a second received symbol by eliminating an interference component caused by the first distorted symbol from the second distorted symbol using a predetermined second compensation coefficient; a second hard decider for generating a second compensated symbol by performing a hard decision on the second received symbol; and an adaptive controller for updating the first compensation coefficient for the first compensator based on the error symbol and the second compensation symbol.