In this paper a number of techniques are investigated for predicting the performance of a digital system in fading channels. A method is presented which combines both bit error rate simulation and site-specific channel characterisation using ray tracing techniques. Probability density functions are developed for the resulting signal variations which show instantaneous bit error rate versus fade depth. Using this approach, the irreducible error rate for both random FM and RMS delay spread have been determined for π/4DQPSK. It is shown that RMS delay spread alone cannot fully represent the distorting effect of the wideband channel. However, if combined with narrowband fading statistics, it becomes possible to estimate the average bit error rate for a given propagation environment. To increase the speed of our fading simulations, an importance sampling approach has also been developed which yields results that are comparable to those generated from full simulations
|Pages||577 - 582|
|Publication status||Published - Sep 1993|
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Name of Conference: 4th International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)
Venue of Conference: Yokohama, Japan
- bit error rates
- mobile radio