Effects of time offset on the performance of slow frequency hopping in mobile communication

The paper presents the effects of time offset between the intended users signal and the interference signal on the performance of a slow-FH CDMA cellular radio system when the interference hops to a frequency slot different from the intended signal. In each hop several bits are transmitted using appropriate modulation. The up-link only is considered. Assuming a mobile system containing seven cells with 1 km radius, the probability density function of the normalised time delay is derived. This function is used to predict the average signal-to-interference ratio, as a function of normalised traffic. Finally, the probability of error is found