| 基于分散型导频的MB OFDM UWB稀疏信道估计 |
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| 引用本文： | 朱行涛,刘郁林,李常春.基于分散型导频的MB OFDM UWB稀疏信道估计[J].信息工程大学学报,2014,15(1):52-56. |
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| 作者姓名： | 朱行涛 刘郁林 李常春 |
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| 作者单位： | [1]国防信息学院,湖北武汉430010 [2]重庆通信学院,重庆400035 |
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| 基金项目： | 重庆高校创新团队建设计划资助项目（KJTD201343） |
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| 摘 要： | 针对多频带-正交频分复用（MB-OFDM） UWB系统,提出一种基于分散导频的UWB信道估计算法.该算法采用分散型导频,避免了频域内插,可以实时对信道进行估计.然后利用UWB信道的稀疏簇特性和傅立叶变换,在时域和频域连续对信道参数进行修正,有效地改善了低信噪比时的性能.仿真结果表明,在信噪比SNR=12时,新算法的误比特率比经典的内插LS算法约有3.5dB的改善.
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| 关 键 词： | UWB 分散导频 稀疏信道 信道估计 |
Sparse Channel Estimation for MB-OFDM UWB Systems Based on Scatter Pilot |
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| ZHU Xing-tao,LIU Yu-lin,LI Chang-chun.Sparse Channel Estimation for MB-OFDM UWB Systems Based on Scatter Pilot[J].Journal of Information Engineering University,2014,15(1):52-56. |
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| Authors: | ZHU Xing-tao LIU Yu-lin LI Chang-chun |
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| Affiliation: | 1. Academy of National Defense Information, Wuhan 430015, China; 2. Chongqing Communication College, Chongqing 400035, China) |
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| Abstract: | A novel sparse channel estimation algorithm based on scatter pilot is proposed in this paper for multi-band OFDM ultra wide-band communications. In this algorithm, scatter pilot is first used to avoid interpolating, and it also could estimate the channel timely. Then the sparse structure property of UWB channel and discrete Fourier transform are used to correct the channel parameters in time domain and frequency domain continuously, which improves the preference in low SNR effectively. Simulation results demonstrate that the new algorithm BER outperforms the LS algorithm by about 3.5dB when the SNR = 12dB. |
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| Keywords: | ultra wide band scatter pilot sparse channel channel estimation |
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