Error probability analysis of an MC-DS-CDMA system under Weibull fading with a moment-generating function

The performance, with error probability analysis, of an MC-DS-CDMA (multi-carrier direct-sequence coded-division multiple-access) system adopting a Weibull fading channel is proposed and evaluated. On the basis of the multivariate MGF (moment-generating function) of Weibull statistics and an alternative expression of the Q-function, an approximate BER (bit-error rate) expression is derived for an MC-DS-CDMA system combined with MRC (maximal ratio-combining) diversity. The Weibull fading model is applied to analyze the BER performance of an MC-DS-CDMA system by considering multi-users with both multi-carriers and the phenomena of PBI (partial-band interference) cases. Regardless of the channel model assumed or the user number considered, it is noteworthy that the PBI is definitely the most important factor dominating the performance of an MC-DS-CDMA system, according to the results obtained in this study. The reliability of the proposed schemes can be explicitly verified in accordance with the previously reported results. Thus, we assert that the aim of the performance analysis of an MC-DS-CDMA system operating under Weibull fading has been completely achieved.