Apparatus and method for detecting I/Q channel imbalance in...

Details Apparatus and method for detecting I/Q channel imbalance in... Apparatus and method for detecting I/Q channel imbalance in...

2007-04-24

2007-04-24

Bocure, Tesfaldet (Department: 2611)

Pulse or digital communications

Receivers

C375S345000

Reexamination Certificate

active

10889900

ABSTRACT:
An apparatus and a method for detecting imbalances between an I-channel signal and a Q-channel signal in order to suppress a spurious signal in a direct conversion digital quadrature transmission system is disclosed. The apparatus includes: a compensation signal generating unit for generating a first and a second compensation signals based on a digital I-channel and a digital Q-channel signals; a baseband signal generating unit for generating an I-channel and a Q-channel baseband signals by converting a radio frequency signal into a low frequency signal; and a detecting unit for detecting a phase imbalance and an amplitude imbalance between the digital I-channel and the digital Q-channel signals by using a correlation between the first and the second compensation signals with the I-channel and the Q-channel baseband signals.

REFERENCES:
patent: 6925132 (2005-08-01), Song et al.
patent: 7010059 (2006-03-01), Song et al.
patent: 7130359 (2006-10-01), Rahman
patent: 1020030064085 (2003-07-01), None
patent: WO 01/02433 (2001-01-01), None

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