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다중 경로 하에서 주파수 오프셋을 갖는 근거리 통신망용 Orthogonal Frequency Division Multiplexing 시스템의 성능 한계
고예윤(Yeyun Kho),조규섭(Kyuseob Cho) 한국정보기술학회 2003 한국정보기술학회논문지 Vol.1 No.1
Recently, the OFDM transmission is selected as the physical layer of the Wierless LAN, IEEE 802.11, because it is strong arainst the multipath channel. However, the OFDM transmission is weak against the frequency offset. The frequency offset attenuates the received signal power and makes performance bound in the OFDM transmission. We show the performance bound of the OFDM system. We show the performance bound of OFDM system for the Wireless LAN under the multipath channel with the frequency offset. According to the results, increasing the transmitting power is not useful to improve the performance, when the frequency offset exits. In addition, the performance degradation is much severe under the multipath channel than under the AWGN channel.