一种改进的ISFA信道估计算法

发布时间：2018-02-28 20:29

本文关键词： 光正交频分复用(O-OFDM) 信道估计凯撒窗符号内频域平均(ISFA) 偏振复用(PDM)　出处：《光电子.激光》2014年08期 　论文类型：期刊论文

【摘要】：设计了一种基于符号内频域平均(ISFA)的信道估计算法,用于偏振复用光正交频分复用(PDM-O-OFDM)系统的信道估计和传输信道色散损伤的均衡。算法采用凯撒窗函数对基于导频的ISFA算法进行改进,提高了信道估计后处理的精度,改善了长距离PDM-O-OFDM系统的误码率(BER)和光信噪比(OSNR)性能。通过仿真试验,确定了算法的相关参数,分析了算法对长距离系统中色散损伤的均衡性能。仿真结果表明,改进算法对于传输距离超过700km系统的均衡效果优于原算法,其中900km处的OSNR代价比原算法低0.35dB。
[Abstract]:A channel estimation algorithm based on symbol internal frequency domain averaging (ISFAA) is proposed. For polarization multiplexing optical orthogonal frequency division multiplexing (PDM-O-OFDM) system, channel estimation and transmission channel dispersion damage equalization are studied. Caesar window function is used to improve the ISFA algorithm based on pilot, which improves the accuracy of channel estimation post-processing. The performance of bit error rate (ber) and optical signal-to-noise ratio (OSNR) of long distance PDM-O-OFDM systems are improved. The relevant parameters of the algorithm are determined by simulation experiments, and the equalization performance of the algorithm to dispersion damage in long distance systems is analyzed. The simulation results show that, The improved algorithm is better than the original algorithm in equalizing the transmission distance over 700km system, and the OSNR cost at 900km is 0.35 dB lower than that of the original algorithm.
【作者单位】：河北工业大学信息工程学院;吉林大学通信工程学院;
【基金】：国家自然科学基金(61077054) 天津市高等学校科技发展基金计划(20120715) 河北省高层次人才资助(C2013001048) 河北省青年科学基金(F2014202036) 河北省自然科学基金(F2012202116)资助项目
【分类号】：TN929.1

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