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Performance Comparison of Two Frequency Tracking Algorithms for OFDM Systems
Author(s): 
Pages: 13-17
Year: Issue:  1
Journal: WIRELESS COMMUNICATION TECHNOLOGY

Keyword:  正交频分复用(OFDM)残余频偏频率跟踪算法;
Abstract: 本文分析了残余频偏对OFDM系统性能的影响,针对OFDM系统中常见的两种频率跟踪算法,比较了它们在加性高斯白噪声信道、SUI-2和SUI-5信道环境下的性能.仿真表明,采用计算相位旋转的频率跟踪算法比基于循环前缀的频率跟踪算法的估计精度高.在信道最大多径时延较循环前缀长度小时,两种算法对系统性能影响均较小;在信道最大多径时延接近循环前缀长度时,基于循环前缀的频率跟踪算法的估计误差的标准偏差通常超过子载波间隔的1%,系统会有明显的信噪比损失.
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