Performance Evaluation for a Cellular CDMA Operating over Frequency-Selective Fading Channel

초록

In the previous results, the performance of a cellular CDMA system operationg over a flat-Rayleigh fading channel has been considered, in which it is assumed that the coherent bandwidth of a channel exceeds the spread bandwidth of a signal. This assumption is incorrect for a large degree of spreading. Therefore, the channel should be modeled as exgibiting frequency-electivity. In this paper, we consider the performance of a cellular radio DS/CDMA system operating over a frequency-selective fading channel. The base-to-mobile link is modeled as a Rician fading channel, with all signal transmitted from a given base station fading n unison. For the mobile-to -base link,we use a similar model, except that the waveforms from all users are assumed to experience indeendent fading.