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SNR estimation algorithm based on the preamble for wireless OFDM systems 被引量：3

SNR estimation algorithm based on the preamble for wireless OFDM systems
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摘要 Based on the analysis of the performance of Boumard＇s SNR method for wireless orthogonal frequency division multiplexing （OFDM） systems, a new estimation algorithm of the noise variance is proposed by only using the data samples of the two training symbols in the preamble, and the second order moment of these data samples is employed to estimate the signal power. The average SNR and the SNRs on the subchannels can all be estimated by the proposed algorithm, and its performance is independent of the channel＇s frequency selectivity. Simulation results show that the performance of the proposed method is highly improved and much better than that of Boumard＇s method. Based on the analysis of the performance of Boumard＇s SNR method for wireless orthogonal frequency division multiplexing （OFDM） systems, a new estimation algorithm of the noise variance is proposed by only using the data samples of the two training symbols in the preamble, and the second order moment of these data samples is employed to estimate the signal power. The average SNR and the SNRs on the subchannels can all be estimated by the proposed algorithm, and its performance is independent of the channel＇s frequency selectivity. Simulation results show that the performance of the proposed method is highly improved and much better than that of Boumard＇s method.
作者 REN GuangLiang CHANG YiLin ZHANG HuiNing
机构地区 State Key Laboratory of Integrated Service Networks
出处 《Science in China(Series F)》 2008年第7期965-974,共10页 中国科学（F辑英文版）
基金 the National Natural Science Foundation of China (Grant Nos.60602063, 60532060 and 60772134) the Natural Science Foundation of Shaanxi Province (Grant No.2006F28)
关键词 orthogonal frequency division multiplexing （OFDM） SNR estimation PREAMBLE wireless channel orthogonal frequency division multiplexing （OFDM）, SNR estimation, preamble, wireless channel
分类号 TN91 [电子电信—通信与信息系统]
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参考文献11

  • 1YU Xiaoyan WANG Jiaqing YANG Luxi HE Zhenya.Doubly selective fading channel estimation in MIMO OFDM systems[J].Science in China(Series F),2005,48(6):795-807. 被引量：4
  • 2Keller T,,Hanzo L.Adaptive multicarrier modulation: A convenient framework for time-frequency processing in wireless communications[].IEEE Proc.2000
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二级参考文献10

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共引文献3

同被引文献4

引证文献3

二级引证文献7

Science in China(Series F)
2008年 第7期

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