نتایج جستجو برای: fading

تعداد نتایج: 19732  

2004
Jin Young Kim Jae Hong Lee

In this paper, acquisition performance with adaptive pre-filtering is analyzed for a "coherent Paralperformance in a mobile fading channel. Under severe multiDath fading conditions. the P N code acauisition is difficult Y le1 matched-filter (MF) acquisition scheme with a reference filter (RF) in a multipath fading channel. Adaptive prefilterina is emoloved to reduce the effect of severe multipa...

2016
DRAGANA KRSTIĆ ZORAN JOVANOVIĆ RADMILA GEROV MIHAJLO STEFANOVIĆ MILAN GLIGORIJEVIĆ Aleksandra Medvedeva

Wireless communication system working over Gamma shadowed Nakagami-m multipath fading channel in the presence of cochannel interference exposed to Nakagami-m short term fading and Gamma long term fading is investigated in this work. In interference limited channel, the ratio of desired signal envelope and interference is important performance measure. For considered model signal to interference...

Journal: :European Transactions on Telecommunications 2005
Dimitris A. Zogas Nikos C. Sagias George S. Tombras George K. Karagiannidis

In this letter, capitalising on a recently presented expression for the joint probability density function of the Weibull fading statistical model, a novel closed-form expression is derived for the average output signal-tonoise ratio (SNR) of an L-branch receiver employing equal-gain combining (EGC). The obtained expression includes the case of correlative fading with arbitrary correlation amon...

2016
Stefan R. Panić Mihajlo Stefanović Jelena Anastasov Bojana Nikolić Petar Spalević Dusan Stefanović

In this paper, the effects of multipath fading and shadowing over the propagation channel are observed through the performance analysis of switch and stay selection combining (SSC) technique. The short term fading (multipath fading) in conjunction with the long term fading (shadowing) are both modeled by Generalized-K (KG) distribution. The proposed system is considered as interference-limited ...

Journal: :SSRN Electronic Journal 2016

2001
Xiaoming Zhu Joseph M. Kahn

In free-space optical communication links, atmospheric turbulence causes fluctuations in both the intensity and the phase of the received light signal, impairing link performance. In this paper, we describe several communication techniques to mitigate turbulence-induced intensity fluctuations, i.e., signal fading. These techniques are applicable in the regime in which the receiver aperture is s...

2002
Filipe D. Cardoso Luís M. Correia

A technique for fading depth characterisation in wideband mobile communications systems is described. The approach, based on the eigenvalue decomposition technique, allows deriving the cumulative distribution functions of the received power for Rayleigh and Ricean fading channels. Application examples for different systems, namely GSM, UMTS, HIPERLAN and MBS, working within different environmen...

1998
Ezio Biglieri

In this paper we review the most peculiar and interesting information-theoretic and communications features of fading channels. We first describe the statistical models of fading channels which are frequently used in the analysis and design of communication systems. Next, we focus on the information theory of fading channels, by emphasizing capacity as the most important performance measure. Bo...

2013
K. Ghosh

This paper present the performance analysis of two-hop relayed transmission over asymmetric Rayleigh and Nakagami-m fading environment. Nakagami-m fading is considered because it works as generalized fading model. The model proposed by Nakagami uses m parameter to describe the fading conditions for both Rayleigh and Rician fading. Closed form expression for Outage Probability and Average Bit Er...

2011
Rupaban Subadar

Expressions of ASER for different M-ary modulations and outage probability of dual pre-detection equal gain combining (EGC) receiver have been derived over correlated Nakagami-m fading channels with arbitrary and non-identical fading parameters. A classical probability density function (PDF) based approach has been used to obtain expressions of different performance measures. The mathematical a...

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