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频率选择性信道下OFDM帧同步及性能分析

DOI: 10.13190/jbupt.200805.98.wangwb, PP. 98-101

Keywords: 正交频分复用,同步,多径衰落信道,载波频率偏移

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Abstract:

提出了一种正交频分复用(OFDM)帧同步算法,在OFDM帧同步符号时域中使用2个完全相同的序列,考虑到多径信道的分集,提出新的目标函数,使得算法不受频率选择性信道和载波频率偏移的影响.给出了存在帧同步信号和不存在帧同步信号时判决统计量分布的解析形式,理论上得到检测器的漏警概率和虚警概率特性,仿真结果验证了理论分析的正确性.接收端信噪比为20dB时,给定漏警概率为10-10,本文算法对应的虚警概率趋于零.

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