Aspects of simulation and measurement

In generating signals similar to those encountered in mobile communications, it is practical to compute signal samples from the scenario model by moving the receiving antenna amongst discrete sources. In simulations, calculations of any metric over a finite sample size will provide only an estimate of the ensemble average value. In this section, basic considerations for computer simulations of the short-term fading channel are discussed. Two aspects of simulation are: the generation of discrete channel samples, that may be mutually independent and have the correct ensemble averaged statistics; and the generation of time (i.e. space-) series which are samples of continuous channel behaviour, and these may comprise closely spaced, correlated samples, which should also have the correct ensemble-averaged statistics.