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Complex efficient carrier frequency offset estimation algorithm in OFDM systems

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3 Author(s)
Zhongshan Zhang ; Center for Wireless Commun., Beijing Univ. of Posts & Telecommun., China ; Keping Long ; Yuanan Liu

A new carrier frequency offset estimation scheme in the orthogonal frequency division multiplexing (OFDM) system is proposed. The proposed algorithm is an extension of the Michele Morelli (M&M) algorithm. By dividing one training symbol into L>1 identical small blocks, the carrier frequency offset estimation range up to ±L/2 times subcarrier spacing can be obtained. The proposed algorithm can utilize the correlativity among all small blocks of a training symbol more sufficiently than the M&M algorithm, and thus it is more accurate and robust. Without increasing the estimation errors, the computational complexity of the proposed algorithm can be further reduced by increasing parameters Hl and Hh with a positive value simultaneously.

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Broadcasting, IEEE Transactions on  (Volume:50 ,  Issue: 2 )