Results 201 to 210 of about 29,669 (249)

Turbo-decoding without SNR estimation

IEEE Communications Letters, 2000
Theoretically, it is necessary to estimate the SNR when using a MAP of the log-MAP constituent decoder. The effect of an SNR mismatch on the bit error rate performance of turbo-codes and the design of good variance estimators have been addressed by several authors.
Alexander Worm, Peter A. Hoeher, Norbert Wehn   +2 more
exaly   +2 more sources

Improved SNR Estimation Algorithm

2017 International Conference on Computer Systems, Electronics and Control (ICCSEC), 2017
As for several NDA SNR estimation algorithm for QPSK signal, their SNR estimation performance is poor. This article puts forward an improved low complexity SNR estimation algorithm to improve the SNR estimation range and accuracy. The mean, bias and variance of the new algorithm are simulated.
Xu Qun, Zhou Jian
exaly   +2 more sources

A Joint Algorithm of SNR Estimation for Expanding Estimation Range

2021 IEEE 21st International Conference on Communication Technology (ICCT), 2021
Yubai Li
exaly   +2 more sources

On the Blind SNR Estimation for IF Signals

First International Conference on Innovative Computing, Information and Control - Volume I (ICICIC'06), 2006
Signal-to-Noise Ratio (SNR) is a widely used significant parameter in communication systems. An eigenvector decomposition and subspace approach is employed for the blind SNR estimation for Intermediate Frequency (IF) signals in additive white Gaussian noise (AWGN) channel.
Dan Sui, Lindong Ge
openaire   +1 more source

A reduced complexity SNR estimator

IET Conference Publications, 2009
This paper presents a novel reduced complexity SNR estimator, whose performances are comparable with the maximum-likelihood estimator while saving one half of the floating point multiplications and one third of the floating point sums. A detailed statistical description of the estimate, as well as simulation results, are provided. (4 pages)
CANDREVA, ENZO ALBERTO, CORAZZA, GIOVANNI EMANUELE, VANELLI CORALLI, ALESSANDRO   +2 more
openaire   +2 more sources

SNR-Based Link Quality Estimation

2012 IEEE 75th Vehicular Technology Conference (VTC Spring), 2012
The ability to accurately estimate wireless link quality is critical to the performance of routing protocols and rate adaptation algorithms in wireless mesh networks. Current link quality estimation methods utilize the packet delivery ratio (PDR) measurement of periodic broadcast probes sent at the lowest transmission rate.
Wee Lum Tan, Peizhao Hu, Marius Portmann
openaire   +2 more sources

SNR estimation for nonconstant modulus constellations

IEEE Transactions on Signal Processing, 2004
We propose a new technique to estimate the signal-to-noise ratio (SNR) over the flat-fading channel. This is a non-data-aided, envelope-based estimator that can be applied to non-constant modulus constellations which is a feature not found in the existing approaches.
Ping Gao 0001, Cihan Tepedelenlioglu
openaire   +1 more source

Frequency rate estimation at high SNR

IEEE Transactions on Signal Processing, 1997
The problem of estimating the frequency rate-of-change of complex-valued frequency-modulated signals from noisy observations is considered. The performance of four related estimators is studied, both analytically and by means of simulations, and their relationship to the estimators proposed by Djuric and Kay (1990) and Lang and Musicus (1989) is ...
Peter Händel, Petr Tichavský
openaire   +1 more source

A study on SNR estimation for cognitive radio

2012 IEEE International Conference on Ultra-Wideband, 2012
In detect and avoid techniques of ultra-wide-band systems, there are some avoidance techniques which require information of both a primary signal and a noise level in order to control the transmitted power. Thus, we need to estimate the primary signal power and the noise variance with a high degree of accuracy.
Masahiro Fujii, Yu Watanabe
openaire   +1 more source

SNR Estimation Methods for UWB Systems

IEEE Transactions on Wireless Communications, 2007
The problem of estimating the signal-to-noise ratio for time-hopping binary pulse position modulated signals, time- hopping binary phase shift keying signals, and direct-sequence binary phase shift keying signals in an ultra-wide bandwidth (UWB) system is studied.
Yunfei Chen 0001, Norman C. Beaulieu
openaire   +1 more source