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Effect of Nonlinear Power Amplifier and Carrier Frequency Offset on OFDMA Systems for WiBro Services  

Park Hee-Ra (아이엔와이어리스 S/W개발팀)
Choi Seung-Kuk (인천대학교 정보통신공학과 디지털통신시스템 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.7A, 2005 , pp. 557-567 More about this Journal
Abstract
We evaluate the BER performance of OFDMA system for Wibro services in frequency selective Rayleigh fading channel, considering the carrier frequency offset and the nonlinear high power amplifier. In the uplink OFDMA, nonlinear amplifier and frequency offset introduce larger BER degradation than in the downlink. We explain the reason and obtain the required output back-off of the nonlinear amplifier and value of frequency offset for good BER performance.
Keywords
WiBro; OFDMA; BER;
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