ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
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A Joint Scheme of AGC and Gain/Phase Mismatch Compensation for QPSK DCR

  • Song, Yun-Jeong (Digital Broadcasting Research Division, ETRI) ;
  • Lee, Ho-Jin (Digital Broadcasting Research Division, ETRI) ;
  • Ra, Sung-Woong (Department of Electronics and Electrical Engineering, Chungnam National University) ;
  • Kim, Young-Wan (School of Electronic and Information Engineering, Kunsan National University)
  • Received : 2003.11.25
  • Published : 2004.10.31
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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.

Keywords

References

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