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Blind SNR Estimation with Coherent Function for OFDM Systems

Wen-Long CHIN, Sau-Gee CHEN

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Summary :

In OFDM receivers, an accurate signal-to-noise ratio (SNR) estimation is desirable for all sorts of operations involved in high-performance baseband demodulation. In this work, conventional SNR estimation techniques are investigated. Next, a blind SNR estimation scheme for the phase-shift keying (PSK) signals based on the coherence function is proposed. The proposed method is non-data-aided (NDA) and hence bandwidth-efficient. Simulations confirm that the proposed method has the best performance from moderate to high SNRs both in AWGN and dispersive channels; however, the proposed method has worse performance when SNRs are low.

Publication
IEICE TRANSACTIONS on Communications Vol.E91-B No.11 pp.3753-3756
Publication Date
2008/11/01
Publicized
Online ISSN
1745-1345
DOI
10.1093/ietcom/e91-b.11.3753
Type of Manuscript
LETTER
Category
Wireless Communication Technologies

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