نتایج جستجو برای: multipath fading

تعداد نتایج: 26003  

2012
Mike O. Asiyo Thomas J. O. Afullo

This study builds on the earlier work by Odedina and Afullo on Multipath fading in Durban. Their work was based on multipath measurements in Durban over a 6.73 km Line-of-Sight (LOS) link. This submission uses the geoclimatic factor approach and ITU-R recommendations P530-14 to obtain the multipath fading occurrence in five cities in South Africa, including Durban. Three-year radiosonde data is...

2004
Hidenori OKUNI Eisuke KUDOH

Transmission performance of a multi-input multi-output (MIMO) antenna system (i.e., antenna diversity, adaptive antenna array, and space division multiplexing) highly depends on the arrival angle distribution of propagation paths. In this letter, a multipath fading simulator based on distributed scattering model is presented. The impacts of the arrival angle distribution of propagation paths on...

Journal: :IEEE Trans. Communications 2002
Gregory D. Durgin Theodore S. Rappaport David A. de Wolf

This paper presents new envelope probability density functions (pdfs) that describe small-scale, local area fading experienced by narrow-band wireless receivers. The paper also develops novel pdfs that describe the local area fading of two specular multipath components in the presence of other diffusely propagating waves. These pdfs are studied in the context of classical fading pdfs such as th...

2013
Ahmad M. Alshamali Mohammed S. Aloqlah

Ascertaining the importance of the recently proposed spatial modulation, we study its performance in Weibull multipath fading channels. Closed form integral expressions for calculating the symbol error rate of spatial modulation (SM) in independent, not necessarily identical Weibull fading channels are derived. Simulation and the analytical results, considering different transmission scenarios,...

1995
Peter J. McLane

An eecient series that is used to calculate the probability of error for a BPSK modulated DS CDMA system with chip timing and carrier phase errors in a slowly fading, multipath channel is derived. The receiver is assumed to be a coherent RAKE receiver that employs selection diversity. The error probability derivations require the characteristic functions of the intersymbol interference and the ...

2001
Jianxia Luo James R. Zeidler

This paper presents the average error probability performance in coherent DS-CDMA systems using a 2DRAKE receiver with an arbitrary number of antennas and arbitrary number of RAKE fingers. In the analysis, we assume a general frequency selective Nakagami-m fading channel with exponential Multipath Intensity Profile. Analytical expression of the average Bit-Error-Rate (BER) is derived, including...

2006
J. Barnes C. Rizos M. Kanli A. Pahwa Joel Barnes

Despite the popularity and maturity of RTK GPS (GNSS), acceptable performance is heavily dependent on a relatively unobstructed sky-view, where there are at least five satellites with good geometry available, and on the reliability of the wireless data link used for differential corrections. In so-called “difficult” environments where satellite obstruction is common, such as open-pit mining and...

Journal: :IEEE Trans. Communications 2002
Shengli Zhou Georgios B. Giannakis Ananthram Swami

We compare single user digital multi-carrier spread spectrum (MC-SS) modulation with direct sequence (DS) SS (with a modified implementation) in the presence of narrowband interference (NBI) and multipath fading. We derive closed-form expressions for the symbol error probability for both the linear MMSE receiver as well as the conventional matched-filter receiver under different scenarios: addi...

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