分布式MIMO OFDM信号多频偏多信道联合盲估计作者：黄艳艳 彭华乙酸乙酯实验装置
来源：《计算机应用》2015年第06蚕蛹虫草期 摘要：针对多径衰落信道下分布式多输入多输出正交频分复用（MIMOOFDM）系统中频偏信道联合盲估计难的问题，提出了一种有效的多频偏多信道联合盲估计方法。该算法利用盲解卷积分离算法接收信号的同时得到有频偏影响的多个信道，对分离后的多个信号进行逐个频偏估计，补偿整体信道并去除信道模糊度，得到有效的信道估计值。仿真结果表明，与基于导频的频偏信道估计方法相比，所提算法可在5dB获得1e6的频偏估计精度，在15dB左右获得1e2的信道估计精度，实现了分布式MIMOOFDM信号的多频偏多信道联合盲估计。 关键词：分布式多输入多输出正交频分复用；多频偏多信道；盲源分离；盲估计；模糊度
中图分类号： TN911.7 文献标志码：A
英文摘要
Abstract：Joint blind estimation of multiple frequency offsets and multiple channels is difficult in distributed Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing （合金钢密度MIMOOFDM） system under the multipath fading channel. In order to solve the problem，苏州反光背心 an effective algorithm was proposed. The proposed algorithm made use of blind deconvolution separation method to receive signal and got the multiple channels embedded with frequency offsets meanwhile. After estimating frequency offsets of the separated signals，年糕加工 the real channels estimation could be obtained by removing channel ambiguity and compensating the whole channels. The simulation results show that， the proposed algorithm is able to get 1e6 average Mean Square Error （MSE） of frequency offsets estimation at 5dB and 1e2 average MSE of channels estimation at 15dB compared with existing frequency offset channel estimation method based on pilot车联网天线， the joint blind estimation of multiple frequency offsets and multiple channels for distributed MIMOOFDM signal is realized
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