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An MMSE fine carrier frequency synchronization algorithm for OFDM systems

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3 Author(s)
Heejin Roh ; Dept. of Electr. Eng., Pohang Inst. of Sci. & Technol., South Korea ; Kyungwhoon Cheun ; Jaehong Park

In this paper, we describe a patent pending, fine carrier frequency synchronization algorithm based on a minimum mean-squared error (MMSE) approach for OFDM systems which is insensitive to symbol timing offsets. In order to obtain these attributes, the proposed algorithm adopts a cost function similar to the CMA (constant modulus algorithm) used for blind channel equalization. Another advantage of the algorithm is that the transmission of a known training pattern is unnecessary, thus, improving the transmission efficiency. A hardware efficient version of the proposed algorithm is also developed. Computer simulations are performed to evaluate the performance with QPSK and 64-QAM modulations under a frequency selective multipath channel

Published in:

IEEE Transactions on Consumer Electronics  (Volume:43 ,  Issue: 3 )