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A robust non‐data‐aided SNR estimation method for OFDM systems
Author(s) -
Sheng Bin
Publication year - 2015
Publication title -
transactions on emerging telecommunications technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.366
H-Index - 47
ISSN - 2161-3915
DOI - 10.1002/ett.2612
Subject(s) - cyclic prefix , orthogonal frequency division multiplexing , computer science , interference (communication) , channel (broadcasting) , multipath propagation , symbol (formal) , signal to noise ratio (imaging) , electronic engineering , cognitive radio , algorithm , telecommunications , wireless , engineering , programming language
The information of signal‐to‐noise ratio (SNR) plays an important role in orthogonal frequency division multiplexing (OFDM) systems. Some applications, such as cognitive radio, need non‐data‐aided (NDA) estimation of SNR. In this paper, we propose a robust NDA SNR estimation method, which is developed on the basis of the cyclic prefix of OFDM symbol. The proposed method is immune to the inter‐symbol interference caused by multipath channel and can thus obtain an unbiased estimate of the signal power even in the low‐SNR regime. Copyright © 2013 John Wiley & Sons, Ltd.