Method and system for estimating and compensating IQ imbalance

Details Method and system for estimating and compensating IQ imbalance Method and system for estimating and compensating IQ imbalance

2007-12-25

2007-12-25

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Receivers

C375S326000, C375S345000, C455S324000

Reexamination Certificate

active

10996192

ABSTRACT:
A method of determining IQ imbalance introduced on an RF multicarrier signal received via a channel on a direct conversion analog receiver is disclosed. In one embodiment, the method comprises i) receiving a training signal on the receiver, ii) demodulating the training signal on the receiver, iii) estimating a first frequency domain channel characteristic of the channel based on the demodulated training signal, iv) defining a predetermined relationship between a corrected frequency domain channel characteristic of the channel and the first channel characteristic, the predetermined relationship comprising at least one IQ imbalance parameter, and v) determining the at least one IQ imbalance parameter such that the corrected channel characteristic satisfies a channel constraint.

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