Title :
Simulation of time-varying, frequency-selective multipath fading channels for spread-spectrum waveforms
Author :
Lock, Lei-Lei ; Kong, Xiangming ; Barton, Richard J.
Author_Institution :
Cadence Design Syst. Inc., San Jose, CA, USA
Abstract :
A channel simulator appropriate for arbitrary spread-spectrum waveforms transmitted over arbitrary time-varying, frequency-selective multipath Rayleigh fading channels has been developed and implemented. Both Doppler (or time) diversity and delay (or frequency) diversity are considered in the channel model on which the simulator is based. The channel is assumed to be a time-varying Gaussian channel that obeys the uncorrelated scattering assumption. The model developed consists of multiple Doppler-shifted branches of tap-delay lines. No assumptions are made about the independence of channel taps. Simulation results for flat slow fading, flat fast fading, frequency-selective slow fading and frequency-selective fast fading examples are presented.
Keywords :
Gaussian channels; Rayleigh channels; diversity reception; mobile radio; multipath channels; spread spectrum communication; time-varying channels; Doppler diversity; Gaussian channel; Rayleigh fading channels; channel simulator; delay diversity; flat fast fading; flat slow fading; frequency diversity; frequency-selective channel; frequency-selective fast fading; frequency-selective slow fading; mobile radio; multipath fading channels; spread-spectrum waveforms; tap-delay lines; time diversity; time-varying channel; uncorrelated scattering assumption; Communication channels; Computational modeling; Delay effects; Fading; Frequency diversity; Land mobile radio; Mathematical model; Rayleigh scattering; Spread spectrum communication; System performance;
Conference_Titel :
Signals, Systems, and Computers, 1999. Conference Record of the Thirty-Third Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5700-0
DOI :
10.1109/ACSSC.1999.832032
