BER of OFDM systems impaired by carrier frequency offset in multipath fading channels
BER of OFDM systems impaired by carrier frequency offset in multipath fading channels
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DOI：
10.1109/twc.2005.853884
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发表时间：
2005-09
影响因子：
10.4
通讯作者：
L. Rugini;P. Banelli
中科院分区：
文献类型：
--
作者：
L. Rugini;P. Banelli
我们介绍了一种分析方法来评估的正交频分复用（OFDM）系统的错误概率的载波频率偏移（CFO）的频率选择性信道，其特征在于瑞利或莱斯衰落。通过适当利用载波间干扰（ICI）的高斯近似，我们表明，误码率（BER）的正交幅度调制（QAM）的未编码的OFDM系统可以表示为几个积分的总和，其数量取决于星座的大小。每个积分可以数值计算，或者在瑞利衰落中，通过使用涉及广义超几何函数的级数展开。仿真结果表明，理论分析是相当准确的，特别是对瑞利信道，也与非线性放大器。
We introduce an analytical approach to evaluate the error probability of orthogonal frequency-division-multiplexing (OFDM) systems subject to carrier frequency offset (CFO) in frequency-selective channels, characterized by Rayleigh or Rician fading. By properly exploiting the Gaussian approximation of the intercarrier interference (ICI), we show that the bit-error rate (BER) for an uncoded OFDM system with quadrature amplitude modulation (QAM) can be expressed by the sum of a few integrals, whose number depends on the constellation size. Each integral can be evaluated numerically, or, in Rayleigh fading, by using a series expansion that involves generalized hypergeometric functions. Simulation results illustrate that the theoretical analysis is quite accurate, especially for Rayleigh channels, and also with nonlinear amplifiers.