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Dual-Diagonal LMMSE Channel Estimation for OFDM Systems

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3 Author(s)
Nian Geng ; Dept. of Electron. Eng., City Univ. of Hong Kong, Hong Kong, China ; Xiaojun Yuan ; Li Ping

We propose a low-complexity dual-diagonal (DD-) linear-minimum-mean-square-error (LMMSE) channel estimation algorithm for orthogonal frequency-division multiplexing (OFDM) systems involving iterative channel estimation and signal detection. Computational complexity and mean-square-error (MSE) analysis are presented to evaluate the efficiency of the proposed algorithm. A closed-form expression is derived for the asymptotic MSE of the DD-LMMSE channel estimator. Both analysis and numerical results show that DD-LMMSE performs close to the well-known LMMSE estimator with much lower complexity.

Published in:

Signal Processing, IEEE Transactions on  (Volume:60 ,  Issue: 9 )

Date of Publication:

Sept. 2012

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