BER Analysis of OFDM Systems Impaired by DC Offset and Carrier Frequency Offset in Multipath Fading Channels

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題名:	BER Analysis of OFDM Systems Impaired by DC Offset and Carrier Frequency Offset in Multipath Fading Channels
作者:	Yih, Chi-hsiao
貢獻者:	淡江大學電機工程學系
關鍵詞:	Bit error rate;Fading;Performance analysis;Degradation;Interference;Phase shift keying;Phase modulation;OFDM modulation;Phase estimation;Analytical models
日期:	2007-11
上傳時間:	2011-05-20 10:00:13 (UTC+8)
出版者:	IEEE Communications Society
摘要:	We perform bit-error-rate (BER) analysis of orthogonal frequency division multiplexing (OFDM) systems impaired by both direct current (DC) offset and carrier frequency offset (CFO) in multipath Rayleigh fading channels. Since the performance of OFDM systems is sensitive to the CFO, it is necessary to estimate and correct the CFO at the receiver. The existence of DC offset degrades the performance of CFO estimator and results in large residual CFO after compensation. Moreover, the process of CFO compensation spreads the DC offset energy and causes DC offset interference to all subcarriers. By deriving the BER formula for OFDM systems employing binary phase-shift keying modulation, the dependency of BER on the DC offset, CFO, and estimated CFO is accurately quantified. Simulation results validate the correctness of our theoretical analysis.
關聯:	IEEE Communications Letters 11(11), pp.842-844
DOI:	10.1109/LCOMM.2007.070895
顯示於類別:	[電機工程學系暨研究所] 期刊論文

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