A Joint Scheme of AGC and Gain/Phase Mismatch Compensation for QPSK DCR

descriptionPublicationkeyboard_double_arrow_right Article 13 Oct 2004 English Publisher:WileyJournal:ETRI Journal, volume 26, pages 501-504 (issn: 1225-6463,

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Authors: Yun-Jeong Song; Ho-Jin Lee; Sung-Woong Ra; Young-Wan Kim;

doi: 10.4218/etrij.04.0203.0034

A Joint Scheme of AGC and Gain/Phase Mismatch Compensation for QPSK DCR

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Abstract

This paper presents a simple gain/phase blind compensation algorithm with an automatic gain control (AGC) function for the adoption of the AGC function and compensation for gain/phase imbalances in quadrature phase shift keying (QPSK) direct conversion receivers (DCRs). The AGC function is interactively operated with the compensation algorithm for gain/phase imbalances. By detecting the gain sum and difference values between the I-channel and Q-channel, the combined AGC and gain imbalance compensation algorithm provides a simpler DCR architecture.

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