Influence of arrival wave with amplitude variation on autocorrelation and frequency correlation coefficients in wideband mobile propagation

We had investigated autocorrelation and frequency correlation coefficients of an instantaneous received signal level with bandwidth, one of the basic wideband propagation characteristics in mobile communications, by using a delay profile model with invariable arrival wave amplitude. However, the arriving wave amplitude in an actual field was known to vary with the movement of the receiving point. We clarify the dependence of the correlation coefficients on the amplitude variation of the arriving waves by using computer simulations. Our results show that the autocorrelation coefficient is independent of the amplitude variation in the arriving wave. Furthermore, the frequency correlation coefficient increases because of the median variation in the received level.