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Volume 21 Issue 2
 
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Article Navigation >  Journal of Unmanned Undersea Systems  > 2013  >  21(2): 095-99
WANG Xiao-zhou, ZHANG Yan, HU You-feng. Sparse Channel Estimation of OFDM with Synchronization Errors[J]. Journal of Unmanned Undersea Systems, 2013, 21(2): 095-99. doi: 10.11993/j.issn.1673-1948.2013.02.004
Citation: WANG Xiao-zhou, ZHANG Yan, HU You-feng. Sparse Channel Estimation of OFDM with Synchronization Errors[J]. Journal of Unmanned Undersea Systems, 2013, 21(2): 095-99. doi: 10.11993/j.issn.1673-1948.2013.02.004
shu

Sparse Channel Estimation of OFDM with Synchronization Errors

doi: 10.11993/j.issn.1673-1948.2013.02.004

  • Kunming Branch of the 705 Research Institute, China Shipbuilding Industry Corporation, Kunming 650118, China

  • Received Date: 2012-10-29
  • Rev Recd Date: 2013-02-25
  • Publish Date: 2013-04-20
    Abstract
  • An estimation algorithm of orthogonal frequency division multiplexing(OFDM) channel, which is robust with synchronization errors, is introduced. The severe synchronization error in general underwater channel might cause the aliasing in comb-pilot least square(LS) algorithm based channel estimation, if the strongest signal arrival is not the first one, therefore, a new OFDM sparse channel estimation algorithm is proposed by analyzing the influence of synchroni-zation errors on the LS channel estimation algorithms. In the proposed estimation algorithm, sparse channel estimation with synchronization errors is equivalent to reconstructing a sparse signal from incomplete frequency samples. Some pseudo randomly picked subcarriers are used as pilots, and the compressed sensing(CS) algorithm is adopted for the sparse channel estimation. This algorithm can achieve better performance when synchronization error is large. Lake trial verifies the effectiveness of the proposed algorithm.

     

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    • References(9)
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