Blind Minimum Interference Symbol Synchronization for OFDM Systems in Long ISI Channels

Wen-Long CHIN  

Publication
IEICE TRANSACTIONS on Communications   Vol.E94-B   No.4   pp.1066-1069
Publication Date: 2011/04/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E94.B.1066
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Transmission Systems and Transmission Equipment for Communications
Keyword: 
blind symbol synchronization,  cyclic prefix,  long ISI channels,  minimum interference,  orthogonal frequency-division multiplexing (OFDM),  

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Summary: 
This letter introduces a blind minimum interference symbol synchronization for orthogonal frequency-division multiplexing (OFDM) systems based on the cyclic prefix (CP). The basic idea of our contribution is to obtain an estimate of the channel-tap powers from the correlation characteristics of the CP. Based on the estimate of the channel-tap powers, a minimum interference metric is proposed. The proposed algorithm has low complexity and can be used to cope with long inter-symbol-interference (ISI) channels with length up to twice the CP length.