Title :
A decision-directed SNR estimator for QAM signals over time-varying SIMO channels
Author :
Stephenne, Alex ; Bellili, Faouzi ; Affes, Sofiene
Author_Institution :
INRS-EMT, Montreal, QC
Abstract :
The problem of signal-to-noise ratio (SNR) estimation over time-varying flat fading single-input multiple-output (SIMO) channels, for non constant envelope signals, is addressed in this article when the signal is corrupted by complex additive white Gaussian noise (AWGN). It is based on the use of periodically transmitted pilot symbols to facilitate the estimation process. It relies also on the detection of the remaining symbols, and is therefore a decision directed (DD) procedure. The normalized root mean square error (NRMSE) is used as a measure of performance by Monte Carlo simulations that validate our approach and its performance over a wide SNR range.
Keywords :
AWGN channels; Monte Carlo methods; mean square error methods; quadrature amplitude modulation; telecommunication channels; time-varying channels; AWGN; DD; Monte Carlo simulations; NRMSE; QAM signals; additive white Gaussian noise; decision directed procedure; decision-directed SNR estimator; normalized root mean square error; quadrature amplitude modulation; single-input multiple-output channels; time-varying SIMO channels; AWGN; Additive white noise; Fading; Frequency estimation; Phase shift keying; Quadrature amplitude modulation; Receiving antennas; Root mean square; Signal to noise ratio; Time-varying channels;
Conference_Titel :
Communications, 2008 24th Biennial Symposium on
Conference_Location :
Kingston, ON
Print_ISBN :
978-1-4244-1945-6
Electronic_ISBN :
978-1-4244-1946-3
DOI :
10.1109/BSC.2008.4563196
