Compensation characteristics of channel imbalance in quadrature modulator and demodulator

직교 변.복조기의 채널불균형 보정특성

  • 정창규 (충주산업대학교 전자통신공학과) ;
  • 박한규 (연세대학교 전파공학과)
  • Published : 1996.08.01

Abstract

This paper presents a method of compensating for the gain and phase imbalance of quadrature modulator and demodulator. The gain and phase imbalance are compensated using the received power after the compensation pattern was transmitted at tranceiver. The proposed method is less vulnerable to changes in the transmission channel than the conventional method because compensation is made possible within the tranceiver system, and even the change in phase mblance in accordance with frequency can be compensated utilizing the adaptive algorithm. According to numerical results, a normalized eye opening and a bit error rate are improved by 1.8dB and 3.8dB, respectively.

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