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Title: Fading channel simulator

Abstract

Fading channel effects on a transmitted communication signal are simulated with both frequency and time variations using a channel scattering function to affect the transmitted signal. A conventional channel scattering function is converted to a series of channel realizations by multiplying the square root of the channel scattering function by a complex number of which the real and imaginary parts are each independent variables. The two-dimensional inverse-FFT of this complex-valued channel realization yields a matrix of channel coefficients that provide a complete frequency-time description of the channel. The transmitted radio signal is segmented to provide a series of transmitted signal and each segment is subject to FFT to generate a series of signal coefficient matrices. The channel coefficient matrices and signal coefficient matrices are then multiplied and subjected to inverse-FFT to output a signal representing the received affected radio signal. A variety of channel scattering functions can be used to characterize the response of a transmitter-receiver system to such atmospheric effects.

Inventors:
 [1];  [1]
  1. Los Alamos, NM
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
868688
Patent Number(s):
5191594
Assignee:
United States of America as represented by United States (Washington, DC)
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
fading; channel; simulator; effects; transmitted; communication; signal; simulated; frequency; time; variations; scattering; function; affect; conventional; converted; series; realizations; multiplying; square; root; complex; imaginary; independent; variables; two-dimensional; inverse-fft; complex-valued; realization; yields; matrix; coefficients; provide; complete; frequency-time; radio; segmented; segment; subject; fft; generate; coefficient; matrices; multiplied; subjected; output; representing; received; affected; variety; functions; characterize; response; transmitter-receiver; atmospheric; signal representing; scattering function; transmitted signal; channel scattering; fading channel; time variation; communication signal; atmospheric effects; /375/455/

Citation Formats

Argo, Paul E, and Fitzgerald, T Joseph. Fading channel simulator. United States: N. p., 1993. Web.
Argo, Paul E, & Fitzgerald, T Joseph. Fading channel simulator. United States.
Argo, Paul E, and Fitzgerald, T Joseph. Fri . "Fading channel simulator". United States. https://www.osti.gov/servlets/purl/868688.
@article{osti_868688,
title = {Fading channel simulator},
author = {Argo, Paul E and Fitzgerald, T Joseph},
abstractNote = {Fading channel effects on a transmitted communication signal are simulated with both frequency and time variations using a channel scattering function to affect the transmitted signal. A conventional channel scattering function is converted to a series of channel realizations by multiplying the square root of the channel scattering function by a complex number of which the real and imaginary parts are each independent variables. The two-dimensional inverse-FFT of this complex-valued channel realization yields a matrix of channel coefficients that provide a complete frequency-time description of the channel. The transmitted radio signal is segmented to provide a series of transmitted signal and each segment is subject to FFT to generate a series of signal coefficient matrices. The channel coefficient matrices and signal coefficient matrices are then multiplied and subjected to inverse-FFT to output a signal representing the received affected radio signal. A variety of channel scattering functions can be used to characterize the response of a transmitter-receiver system to such atmospheric effects.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}

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