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 twodimensional inverseFFT of this complexvalued channel realization yields a matrix of channel coefficients that provide a complete frequencytime 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 inverseFFT 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 transmitterreceiver system to such atmospheric effects.
 Inventors:

 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:
 W7405ENG36
 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; twodimensional; inversefft; complexvalued; realization; yields; matrix; coefficients; provide; complete; frequencytime; radio; segmented; segment; subject; fft; generate; coefficient; matrices; multiplied; subjected; output; representing; received; affected; variety; functions; characterize; response; transmitterreceiver; 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 twodimensional inverseFFT of this complexvalued channel realization yields a matrix of channel coefficients that provide a complete frequencytime 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 inverseFFT 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 transmitterreceiver system to such atmospheric effects.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1993},
month = {1}
}