Title :
An MMSE fine carrier frequency synchronization algorithm for OFDM systems
Author :
Roh, Heejin ; Cheun, Kyungwhoon ; Park, Jaehong
Author_Institution :
Dept. of Electr. Eng., Pohang Inst. of Sci. & Technol., South Korea
fDate :
8/1/1997 12:00:00 AM
Abstract :
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
Keywords :
adjacent channel interference; frequency division multiplexing; least mean squares methods; multipath channels; quadrature amplitude modulation; quadrature phase shift keying; synchronisation; 64-QAM modulations; MMSE fine carrier frequency synchronization algorithm; OFDM systems; QPSK; blind channel equalization; computer simulations; constant modulus algorithm; cost function; frequency selective multipath channel; hardware efficient version; interchannel interference; minimum mean-squared error approach; performance; symbol timing offsets; transmission efficiency; Blind equalizers; Computer simulation; Cost function; Frequency modulation; Frequency synchronization; Hardware; OFDM; Performance evaluation; Quadrature phase shift keying; Timing;
Journal_Title :
Consumer Electronics, IEEE Transactions on
