نتایج جستجو برای: rician pdf
تعداد نتایج: 25392 فیلتر نتایج به سال:
We calculate the capacity of a multiple-antenna wireless link with M -transmit and N -receive antennas in a Rician fading channel. We consider the standard Rician fading channel where the channel coefficients are modeled as independent circular Gaussian random variables with non-zero means (non-zero specular component). The channel coefficients of this model are constant over a block of T symbo...
We have recently derived infinite-series expressions for performance measures of multiple-input multipleoutput (MIMO) spatial multiplexing with zero-forcing detection (ZF) for Rician–Rayleigh fading, which is relevant in heterogeneous networks. These expressions ensue from a well-known infinite-series expansion around σ = 0 of the confluent hypergeometric function 1F1(·, ·, σ). Theoretically, t...
PURPOSE Previous work has evaluated the quality of different analytic methods for extracting relaxation times from magnitude imaging data exhibiting Rician noise. However, biexponential analysis of relaxation in tissue, including cartilage, and materials is of increasing interest. We, therefore, analyzed biexponential transverse relaxation decay in the presence of Rician noise and assessed the ...
1 Professor, Department of Electrical and Electronics Engineering, Erciyes university, kayseri, turkey . 2 Department of Electrical and Electronics Engineering, Erciyes university, kaysers, turkey. ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract In traditional wireless cellular networks, wireles...
An important feature of the propagation channel considered here is that the mean or coherent signals do not vanish. Such is the case for what is called in wireless literature Rician fading channel where in addition to incoherent signals there is a significant, nonfluctuating multipath component. The Rician fading channel arises where there is line-of-sight (direct path) between transmitter and ...
This paper presents the theoretical background of digital modulation and evaluates the performance of BPSK, QPSK, and QAM modulation techniques with respect to Bit Error Rate in presence of Gaussian, Rayleigh, and Rician noise. The primary objective of any communication system is to receive the data with minimum errors as the errors degrades the system performance. Bit Error Rate (BER) is an im...
In this paper, a MATLAB based approach for mobile radio channels modeling is presented. Specifically, the paper introduces the basic concepts for modeling flat fading channels in MATLAB by means of user-defined mfiles. Typical small-scale fading channel models are derived such as uncorrelated Rician fading channel and Rayleigh fading channel with Doppler shift. Further, simple and useful MATLAB...
The impact of using wavelet based technique on the performance of a MC-CDMA wireless communication system has been investigated. The system under proposed study incorporates Walsh Hadamard codes to discriminate the message signal for individual user. A computer program written in Mathlab source code is developed and this simulation study is made with implementation of various antenna diversity ...
let $n$ be any positive integer, the friendship graph $f_n$ consists of $n$ edge-disjoint triangles that all of them meeting in one vertex. a graph $g$ is called cospectral with a graph $h$ if their adjacency matrices have the same eigenvalues. recently in href{http://arxiv.org/pdf/1310.6529v1.pdf}{http://arxiv.org/pdf/1310.6529v1.pdf} it is proved that if $g$ is any graph cospectral with $f_n$...
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