Performance evaluation of synchronous MC-CDMA in fading channel incorporating carrier interferometry codes.

摘要

Multi Carrier Code Division Multiple Access (MC-CDMA) is a promising multicarrier multiple access technology for present and future cellular communications. It has some advantages over the traditional multiple access technology like TDMA, FDMA and DSCDMA, etc. MC-CDMA was first proposed in 1993. Since its commencement, it has garnered international attention with hundreds of research articles written about its promise. The performance analysis for MC-CDMA in multipath fading channel has also been investigated by some of the researchers.; The Carrier Interferometry (CI) approach is a very recent approach for wireless communication.; In this thesis work, a multipath fading (Rayleigh fading) channel is considered to evaluate the performance of MC-CDMA, employing CI codes in terms of Bit Error Rate (BER) for synchronous downlink. Based on the model provided by Dr. J. P. Linnartz, the simulations are done using Matlab in frequency domain.; It is shown in this research work that the performance of synchronous MC-CDMA employing CI codes is slightly inferior to that of employing Walsh-Hadamard codes, but that the difference is not significant. As CI codes can double the network capacity in terms of number of users without losing performance in terms of BER, we can conclude that CI codes are promising codes for synchronous downlink MC-CDMA even in fading channel environment. (Abstract shortened by UMI.)