Blind OFDM Channel Estimation By Computing Matrix Jth Roots

Ju Min; Xu Zong-ze

doi:10.3724/SP.J.1146.2008.00785

Volume 31 Issue 6

Jun. 2009

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Article Navigation > Journal of Electronics & Information Technology > 2009 > 31(6): 1371-1375

Ju Min, Xu Zong-ze. Blind OFDM Channel Estimation By Computing Matrix Jth Roots[J]. Journal of Electronics & Information Technology, 2009, 31(6): 1371-1375. doi: 10.3724/SP.J.1146.2008.00785

Citation:

Ju Min, Xu Zong-ze. Blind OFDM Channel Estimation By Computing Matrix Jth Roots[J]. Journal of Electronics & Information Technology, 2009, 31(6): 1371-1375. doi: 10.3724/SP.J.1146.2008.00785

Ju Min, Xu Zong-ze. Blind OFDM Channel Estimation By Computing Matrix Jth Roots[J]. Journal of Electronics & Information Technology, 2009, 31(6): 1371-1375. doi: 10.3724/SP.J.1146.2008.00785

Citation:

Ju Min, Xu Zong-ze. Blind OFDM Channel Estimation By Computing Matrix Jth Roots[J]. Journal of Electronics & Information Technology, 2009, 31(6): 1371-1375. doi: 10.3724/SP.J.1146.2008.00785

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Blind OFDM Channel Estimation By Computing Matrix Jth Roots

doi: 10.3724/SP.J.1146.2008.00785 cstr: 32379.14.SP.J.1146.2008.00785

Ju Min,
Xu Zong-ze

Received Date: 2008-06-19
Rev Recd Date: 2008-10-13
Publish Date: 2009-06-19

Abstract

Abstract

A novel blind channel estimator based on computing Roots of Matrices (RM) is proposed for OFDM systems. This algorithm exploits the finite alphabet property of information symbols and implements channel deconvolution by computing the Jth principle root of a low-triangular Toeplitz matrix. Therefore, RM algorithm has much lower computation complexity than searching algorithms in previous works and is able to function in the case of large channel order that is intractable by searching algorithms. Moreover, an Adaptive RM (ARM) algorithm is proposed to adjust RM estimator by steepest descent method. Simulation results indicate that RM algorithm has great accuracy comparable to the optimal exhaustive search and ARM improves the estimation performance of RM considerably.

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References(1)

References

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