직교복조수신시스템에서의 동위상채널과 직교채널 간 이득불일치 보상 및 자동이득 조절장치 및 그 방법
송윤정, 김영완, 이호진
- 7248654 (2007.07.24)
03MR3100, 이동형 광대역 위성전송 핵심기술 개발,
- An apparatus and a method for controlling a gain of I-channel signal and compensating Q-channel signal in response to the gain imbalance based on the gain-controlled I-channel signal as a reference channel signal is disclosed. The apparatus includes: an auto gain controller for controlling a gain of a signal selected from the I-channel signal and the Q-channel signal to have a predetermined amplitude, thereby generating a gain-controlled signal; a detector for detecting a gain imbalance between the gain-controlled signal and the remaining channel signal; and a compensator for compensating the gain imbalance of the remaining channel signal based on the detected gain imbalance.
- KSP 제안 키워드
- Frequency division, I/Q imbalance, Orthogonal frequency division Multiplexing(OFDM), frequency division multiplex, reference channel, signal based