【摘要】 由于实际信道的时变性,OFDM 系统中每一子载波上的接收信号受到其它子载波上所传输信号的影响,形成载波间干扰(ICI)并造成误码性能降低。本文提出了适用于 OFDM 系统的迭代并行子载波间干扰消除接收技术,分析和仿真结果表明此方法可以有效地消除载波间干扰,在归一化多普勒频移为 0.1 和 0.001 时,分别提高接收机的性能 0.8dB 和 0.5dB。更多还原

【Abstract】 Channel response in OFDM systems varies with time as to corrupt the orthogonality between subcarriers. This gives rise to intercarrier interference and degrades the performance of signal detection. In this paper, the ICI effect on OFDM systems is analyzed, an iterative parallel ICI cancellation receiver is proposed. Simulation results demonstrated that using the new scheme, ICI can be reduced, system performance can be improved by 0.8dB and 0.5dB when the normalized doppler frequency equal to 0.1 and 0.001, respectively.更多还原