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A Matlab-based Object-Oriented Approach to Multipath Fading Channel Simulation

21 Feb 2008 (Updated 21 Feb 2008)

No BSD License

This white paper explains the algorithms used in the Communications Toobox's fading channel function

File Information

Description

Multipath fading channel simulators are essential components of wireless systems physical layer simulations. This white paper presents a MATLAB-based approach to multipath fading channel simulation.

Section II presents an overview of popular methodologies for the simulation of multipath fading channels. Two effects must be simulated: the time selectivity of the channel (Doppler spreading) due to motion, and the frequency selectivity (time spreading) due to resolvable multipath components. Simulation approaches are reviewed for both these tasks.

Section III presents an overview of the simulation methodology used in our channel simulator. The simulator employs an interpolated filtered Gaussian noise source to simulate the Doppler spreading, followed by a bandlimited channel transformation to efficiently simulate the multipath dispersion. Both Rayleigh and Rician processes can be generated, for a set of different Doppler spectra.

Section IV presents the application programming interface (API) of the Communications Toolbox's channel functions, along with channel object properties. Examples illustrate how to create channel objects, use them in a simulation, and visualize simulation quantities using the channel visualization tool.

Simulation examples are given in Section V. The statistical performance is evaluated in terms of the simulated fading processes' probability distributions, Doppler spectra and autocovariances.

Required Products

Communications Toolbox
Signal Processing Toolbox

MATLAB release

MATLAB 7.5 (R2007b)

Tags for This File
Everyone's Tags	fading, jakes(2), matlab, multipath, o, objectoriented, rayleigh(3), rician, wireless
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Comments and Ratings (7)
28 Feb 2008	huzaifa kapasi	excellent reference ... many thanks
06 Mar 2008	dd ddd	ok
20 Mar 2008	David Donovan	Exactly what I was looking for. I was wondering what was going on inside of rayleighchan() and friends!
07 Apr 2008	Solomon Uzoaru	I am yet to grab the whole stuff!
06 Jun 2008	PP Zhu
08 Jul 2008	Tarakapraveen Uppalapati	Very good file and very useful for the beginner of the channel simulation using OOP.
01 Aug 2008	David Xiang	thanks

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Tag Activity for this File
Tag	Applied By	Date/Time
wireless	Cyril Iskander	22 Oct 2008 09:50:05
fading	Cyril Iskander	22 Oct 2008 09:50:05
multipath	Cyril Iskander	22 Oct 2008 09:50:05
rayleigh	Cyril Iskander	22 Oct 2008 09:50:05
rician	Cyril Iskander	22 Oct 2008 09:50:05
jakes	Cyril Iskander	22 Oct 2008 09:50:05
o	Cyril Iskander	22 Oct 2008 09:50:05
objectoriented	Cyril Iskander	22 Oct 2008 09:50:05
matlab	Cyril Iskander	22 Oct 2008 09:50:05
rayleigh	Sandya Rondla	03 Mar 2009 11:02:18
rayleigh	shanghai Normal University yujie	18 Mar 2009 03:31:27
jakes	Priyangshu Ghosh	20 Jul 2009 06:22:21

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