Results 231 to 240 of about 860,332 (273)

Channel reliability estimation for turbo decoding in rayleigh fading channels with imperfect channel estimates

IEEE Communications Letters, 2002
In this letter we propose a simple estimation scheme of the channel reliability factor for turbo decoding in Rayleigh fading channels with imperfect channel estimates. The channel reliability factor is required for iterative MAP decoding of turbo codes and depends on the error variance of the channel estimate as well as the signal-to-noise ratio (SNR ...
null Hyundong Shin, null Jae Hong Lee
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Channel sensing strategy for channel load estimation

Proceedings of the 14th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems, 2011
The emergence of multi-channel wireless networks and cognitive radio networks has rendered dynamic channel selection an important task, and many existing channel selection schemes factor in the amount of wireless activities that take place in each channel, or channel load, to achieve load balance and maximize the utilization of wireless resources.
Brian Sung Chul Choi, Mario Gerla
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Adaptive Channel Estimation in Side Channel Attacks

2018 IEEE International Workshop on Information Forensics and Security (WIFS), 2018
Side channel attacks exploit physical information that leaks from the target implementations to extract secret information, for example keys. Since the observable physical leakages are dependent on the internal state of the cryptographic implementation, predicting (or profiling) this dependency, which is also called leakage model or leakage function ...
Shan Jin, Riccardo Bettati
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OFDM channel estimation with dispersive fading channels

The Journal of China Universities of Posts and Telecommunications, 2012
Abstract In this paper, we studied the channel estimation problem for the orthogonal frequency division multiplexing (OFDM) system when the statistics of the multi-path fading channel is not known or partial known. A channel estimation approach based on polynomial approximation of the channel response is proposed.
Dong-yu WANG, Tao DUAN, Yong-jian ZHANG
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Parametric channel modeling based OFDM channel estimation

The Journal of China Universities of Posts and Telecommunications, 2014
Abstract A simplified parametric channel estimation approach was proposed for orthogonal frequency division multiplexing (OFDM) systems. Based on parametric channel model, this algorithm is composed of two parts: the estimation of channel parameters and channel interpolation. The exponentially embedded family (EEF) criterion is exploited to determine
Hao-bo QING, Yuan-an LIU, Gang XIE, Kai-ming LIU, Fang LIU   +4 more
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Compressive channel estimation

2012
In dieser Arbeit untersuchen wir die kompressive Kanalschätzung (KKS), also die Anwendung der Theorie und Methodologie des Compressed Sensing (CS) auf das Problem der Kanalschätzung doppelt selektiver Kanäle in Multicarrier-Systemen. Nach einer kurzen Einführung in die kabellose Kommunikation und einem kleinen Überblick über CS und einigen seiner ...
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Improved Channel Estimation Method jointing Channel Coding

2019 3rd International Conference on Electronic Information Technology and Computer Engineering (EITCE), 2019
Traditional pilot-based channel estimation techniques are LS-based, MMSE-based and DFT-based mehtods. The LS-based channel estimation performance is worse than MMSE and DFT estimation due to the large noise impact. Although MMSE estimation has superior performance, MMSE estimation is difficult to implement because of matrix inversion during calculation
Taoliu Taoliu, Hongwei Zhang
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Channel parameter estimation in Rayleigh fading channel

Electronics and Communications in Japan (Part III: Fundamental Electronic Science), 2005
In wireless communication environments such as indoors and in a relatively narrow region for which applications have recently started, the information transmission speed is sufficiently faster than the fading variation. In such cases, the fading variation can be viewed as a colored probability process with autocorrelation.
Hirohisa Gambe, Kenji Yokoyama, Miyoshi Saito, Kiyomichi Araki   +3 more
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Adaptive channel estimation for high Doppler channel

2015 3rd International Conference on Signal Processing, Communication and Networking (ICSCN), 2015
This paper considered about how the channel estimation effectively done for high-speed mobility system. Here the transmission rate greatly varied depending on speed of the mobile moving far away or close to the base station. The impulse swings are frequency shifts and delay spread various for each symbol called multipath fading is because of this OFDM ...
S. B. Lenin, S. Malarkkan
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HF channel parameters estimation

First IEEE Signal Processing Workshop on Signal Processing Advances in Wireless Communications, 2002
A new approach in HF channels parameters estimation is presented. It permits the improvement of the link quality analysis procedures involved in the link establishment techniques. This is achieved thanks to the estimation of the parameters that completely define the most widely used HF channel model: the Watterson (1970) model. The estimation method is
B. Escrig, D. Roviras, F. Castanie
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