Constant Modulus Based Blind Channel Estimation for OFDM Systems

Zhigang CHEN
Yatong ZHOU
Feng LIU

IEICE TRANSACTIONS on Communications   Vol.E89-B    No.5    pp.1705-1708
Publication Date: 2006/05/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.5.1705
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
constant modulus,  blind channel estimation,  orthogonal frequency division multiplexing (OFDM),  

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A novel blind channel estimation scheme is proposed for OFDM systems employing PSK modulation. This scheme minimizes the number of possible channels by exploiting the constant modulus property, chooses a best fit over the possible channels by exploiting the finite alphabet property of information signals, and achieves competitive performance with low computational complexity. Results comparing the new scheme with the finite-alphabet based channel estimation are presented.