Results 251 to 260 of about 52,732 (293)

Compound statistical models for shadowed fading channels

AEU - International Journal of Electronics and Communications, 2008
Abstract The commonly used distribution for shadowed fading channels, the Nakagami-lognormal distribution, arises by compounding the Nakagami and log-normal distributions. This distribution, however, does not have a closed form and recently this led Shankar [Outage probabilities in shadowed fading channels using a compound statistical model. IEE Proc
Saralees Nadarajah, Samuel Kotz
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Adaptive multidimensional modulation over faded shadowing channels

2014 IEEE 27th Canadian Conference on Electrical and Computer Engineering (CCECE), 2014
Adaptive modulation is a very useful technique for enhancing data rate over a fading and shadowing channels. In this paper an adaptive M-ary Quadrature Amplitude Modulation (M-QAM) technique is presented for Nakagami-m-Gamma (NG) channel model. The technique presented provides a guaranteed level of bit error rate (BER) performance while at the same ...
Abdulbaset M. Hamed, Raveendra K. Rao, Serguei L. Primak   +2 more
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Shadow fading correlation on CDMA system

2009 9th International Conference on Electronic Measurement & Instruments, 2009
Shadowing relevant mathematical models was introduced in this paper. Spatial correlation of shadow fading depends not only on the distances between bases, but also on environment and frequency. Shadow fading can manifest itself in the degradation of the Rice channel when base stations are closely spaced.
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Detection of shadow fading in wireless networks

2012 International Conference on Future Communication Networks, 2012
In this paper, new approaches are used to detect the occurrence of shadow fading using multiwavelets and slantlet transforms to decompose the signal strength trace and observe the presence or absence of shadow fading by measuring the variations in the slope of the decomposed signal coefficients when considered as a function of scale in log-log plot ...
Ali Abdulnaser Alnoman, Tarik Zeyad Ismaeel   +1 more
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When Banks’ Shadow Fades And Shadow Banking Rises: Securitization And Loan Performance In China

SSRN Electronic Journal, 2023
This study examines the relationship between securitization and loan performance using proprietary loan-level data from a Chinese bank. Securitized loans exhibit lower ex-post default rates and prepayment chances compared to the loans retained on the bank's balance sheet, suggesting no adverse selection or moral hazard within the Chinese securitization
Gong, Di, Wu, Jin, Zhu, Jigao
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Multicode CDMA downlink in shadowed multipath fading

ICC 2001. IEEE International Conference on Communications. Conference Record (Cat. No.01CH37240), 2002
The performance characteristics of a multicode CDMA downlink with systematic convolutional (turbo) coding are obtained under a shadowed multipath fading mobile channel. Two different iterative decoding methods are compared in two different synchronous downlink schemes operating under given channel conditions with the same transmission bandwidth as in ...
A. Bircan, M. Oguz Sunay, A.N. Akansu
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Neural Network Handoff in Shadow-Rayleigh Fading

2005 IEEE International Symposium on Circuits and Systems, 2005
A handoff algorithm in a cellular system under shadow-Rayleigh fading propagation is presented. The algorithm applies the timing advance for mobile positioning. The inputs of the proposed radial-basis function network consist of the mobile direction obtained by the MUSIC method on an array antenna, the received signal strengths (RSSs) of the mobile ...
R. Suleesathira, S. Kunarak
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Energy-Efficient Link Adaptation with Shadow Fading

2011 IEEE 73rd Vehicular Technology Conference (VTC Spring), 2011
Energy-efficient link adaptation is studied for a channel exhibiting log-normal shadow fading in addition to path loss. Both circuit power and power dissipated in the power amplifier are considered. The effective throughput per Joule of energy is maximized over transmit power and a margin for shadowing.
Christian Isheden, Gerhard P. Fettweis
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Locating the Node by Exploiting Shadowing Fading

2015 IEEE 82nd Vehicular Technology Conference (VTC2015-Fall), 2015
Shadowing fading is generally considered to be detrimental to node localization based on received signal strength (RSS). However, in this paper, we propose a new localization method which exploits shadowing fading to localize the node with unknown position.
Zhenghuan Wang, Fei Gao, Heng Liu, Shengxin Xu, Yaping Ni   +4 more
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Modeling of Fading and Shadowing

2011
Various models to describe the statistical fluctuations in wireless channels are presented. These models range from the simple Rayleigh ones, to cascaded ones, and to complex models such as those based on κ – μ, η – μ, and Nakagami-N-gamma distributions. They are compared in terms of their properties, error rates and outage probabilities.
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