DocumentCode :
2325223
Title :
Blind Channel Estimation and Equalization in OFDM System With Circular Precoding
Author :
Kim, Taejoon ; Eo, Iksoo
Author_Institution :
Basic Res. Lab., Electron. & Telecommun. Res. Inst., Daejeon
Volume :
4
fYear :
2006
fDate :
14-19 May 2006
Abstract :
This paper proposes a reliable and efficient blind channel estimation method and a linearly constrained minimum variance (LCMV) receiver with circular precoding for single transmitter and receiver antenna orthogonal frequency division multiplexing (OFDM) system. The proposed blind channel estimation method is based on the interesting cross-correlation property of the cyclic prefix (CP) in an OFDM symbol. Toeplitz structure induced in the cross-correlation matrix allows us to employ a simple and reliable method for extracting channel impulse response effectively. The LCMV optimization criterion is applied for symbol detection of the OFDM symbols. At the same time, a circular precoding scheme for minimizing the maximal power of the dominant interference plus noise in LCMV receiver is considered. In the simulation study, proposed method is compared with other circularly precoded scheme and it demonstrate the superior performance of the proposed method
Keywords :
OFDM modulation; Toeplitz matrices; blind equalisers; channel coding; channel estimation; correlation methods; precoding; receiving antennas; transmitting antennas; OFDM system; Toeplitz structure; blind channel estimation; circular precoding; cross-correlation matrix; cyclic prefix; dominant interference plus noise; equalization; linearly constrained minimum variance; orthogonal frequency division multiplexing; receiver antenna; single transmitter antenna; Blind equalizers; Data communication; Interference; Laboratories; Modems; OFDM; Power system reliability; Receiving antennas; Satellite broadcasting; Transmitters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on
Conference_Location :
Toulouse
ISSN :
1520-6149
Print_ISBN :
1-4244-0469-X
Type :
conf
DOI :
10.1109/ICASSP.2006.1660975
Filename :
1660975
Link To Document :
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