Results 211 to 220 of about 29,669 (249)

The NDA SNR estimation for QAM signals

14th IEEE Proceedings on Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003., 2004
This paper proposes a non-data-aided (NDA) SNR estimation algorithm for QAM signals in additive Gauss white noise channel and on the condition of the equivalent priori probabilities of every constellation signals by using second statistics. The detail analysis and computer simulation for 128QAM signals have been done.
Hua Xu, Qishan Huang, Hui Zheng
openaire   +1 more source

Limitations on SNR estimator accuracy

IEEE Transactions on Signal Processing, 2002
We consider the samples of a pure tone in additive white Gaussian noise (AWGN) for which we wish to determine the signal-to-noise ratio (SNR) defined here to be /spl alpha/=(A/sup 2//2/spl sigma//sup 2/), where A is the tone amplitude, and /spl sigma//sup 2/ is the noise variance.
openaire   +1 more source

A comparison of SNR estimation techniques in the AWGN channel

IEEE Pacific Rim Conference on Communications, Computers, and Signal Processing. Proceedings, 2000
We investigate the performance of various signal-to-noise power ratio (SNR) estimation techniques reported in the literature. The search for the best SNR estimator is undertaken by the software simulation of a baseband, binary PAM signal in an AWGN channel.
David R. Pauluzzi, Norman C. Beaulieu
openaire   +1 more source

SNR Estimation with Heterogeneous Frames

2008 4th Advanced Satellite Mobile Systems, 2008
We study the problem of estimating the signal-to noise ratio (SNR) in linearly modulated systems. It is assumed that the frame of observations consists of several subframes, so that the symbols in different subframes are drawn from different constellations.
Marcos Alvarez-Diaz, Roberto Lopez-Valcarce, Carlos Mosquera   +2 more
openaire   +1 more source

Generalized Moment-Based Method for SNR Estimation

2007 IEEE Wireless Communications and Networking Conference, 2007
This paper investigates non-data-aided (NDA) SNR estimation for QAM transmission over additive white Gaussian noise channels. It proposes a novel class of moment-based SNR estimators. This class is found to be a generalization of the well-known moment-based M2M4 SNR estimation method for PSK modulation.
Mohammed Bakkali, Alex Stephenne, Sofiène Affes   +2 more
openaire   +1 more source

A Blind SNR Estimator for Digital Bandpass Signals

2006 6th International Conference on ITS Telecommunications, 2006
A subspace-based blind signal-to-noise ratio (SNR) estimation algorithm for digital bandpass signals in additive white Gaussian noise (AWGN) channel is developed in this paper. The eigenvector decomposition of the sample correlation matrix of the received signals is performed first, then the signal subspace dimension is determined, the power of the ...
Dan Sui, Lindong Ge
openaire   +1 more source

SNR mismatch and online estimation in turbo decoding

IEEE Transactions on Communications, 1998
Iterative decoding of turbo codes, as well as other concatenated coding schemes of similar nature, requires knowledge of the signal-to-noise ratio (SNR) of the channel so that proper blending of the a posteriori information of the separate decoders is achieved.
Todd A. Summers, Stephen G. Wilson
openaire   +1 more source

An Envelope-based Feature for NDA SNR Estimation

2020 43rd International Conference on Telecommunications and Signal Processing (TSP), 2020
Signal-to-noise Ratio (SNR) estimation is essential in many communication systems. Moment-based SNR estimators are a type of envelope-based estimator. The performance of moment-based estimators are known to decrease with increasing SNR for nonconstant modulus signals.
Muhammed Ceyhun Kardas, Ali Emre Pusane
openaire   +1 more source

Improving SNR estimation for autonomous radio receivers

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005
We have demonstrated that the performance (as measured by its variance) of a popular SNR estimator can be improved by increasing the number of observables per symbol (accomplished by partitioning the symbol interval into a larger (than two) even number of subdivisions) but still processing them in successive pairs.
Marvin K. Simon, Sam Dolinar
openaire   +1 more source

Turbo equalization with iterative online SNR estimation

IEEE Wireless Communications and Networking Conference, 2005, 2005
Theoretically, it is necessary to estimate the signal-to-noise ratio (SNR) of the channel when using a maximum a posteriori (MAP) or log-MAP turbo equalizer. In this paper, we study the effect of an SNR mismatch on the bit error rate (BER) performance of log-MAP and max-log-MAP turbo equalizers, and propose an iterative online SNR estimation scheme ...
Shahram Talakoub, Behnam Shahrrava
openaire   +1 more source