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一种抗窄带干扰的OFDM符号定时同步改进算法

DOI: 10.13190/j.jbupt.2015.01.015, PP. 76-81

Keywords: 抗窄带干扰,正交频分复用,符号定时同步,加扰

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Abstract:

为了提高正交频分复用(OFDM)系统定时同步的抗窄带干扰能力,利用加扰的思想对Park算法的前导符号进行了改进,并提出了新的定时测度函数.通过TU-6多径信道下的仿真表明,在窄带干扰的影响下改进算法仍能保持尖锐的相关峰值特性,实现准确的定时估计,同时其性能会随着子载波数的增加得到提升.此外,改进算法也降低了相关旁峰的大小,提高了定时同步的抗噪声能力.

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