NDLI: A Real-Time SNR Estimator for D-MPSK over Frequency-Flat Slow Fading AWGN Channels

Content Provider	IEEE Xplore Digital Library
Author	Linn, Y.
Copyright Year	2006
Description	Author affiliation: Univ. of British Columbia, Vancouver (Linn, Y.)
Abstract	We present a channel SNR (signal-to-noise ratio) estimator for D-MPSK (differential M-ary phase shift keying) in AWGN (additive white Gaussian noise). The estimator is shown to have the following advantages: (1) the estimator has a compact fixed-point hardware implementation; (2) it requires only 1 sample/symbol; (3) accurate estimates can be generated in real-time; (4) the estimator is resistant to imperfections in the AGC (automatic gain control) circuit. We investigate the proposed estimator theoretically and through simulations. General formulas are developed for SNR estimation in the presence of frequency-flat slow fading, and specific results are presented for Nakagami-m fading. The proposed estimator is then compared to other SNR estimators, and it is shown that the proposed method requires less hardware resources while at the same time providing superior performance. Finally, we briefly consider application of the proposed SNR estimator to SNR estimation in coherent M-PSK receivers when carrier synchronization has not been achieved.
Starting Page	1
Ending Page	8
File Size	1097361
Page Count	8
File Format	PDF
ISBN	9781424400027
DOI	10.1109/SARNOF.2006.4534767
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-03-27
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Frequency estimation Fading AWGN channels Signal to noise ratio Hardware Phase estimation Phase shift keying Additive white noise Gain control Circuits
Content Type	Text
Resource Type	Article

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