On the Performance of Partitioned-Spreading CDMA
نویسندگان
چکیده
In this paper, we investigate the performance of a recently proposed multiple-access system, namely, partitionspreading CDMA (PS-CDMA). We show via variance evolution that the asymptotic channel throughput of PS-CDMA improves monotonically as the number of partitions increases. The fundamental limit of the PS-CDMA system is calculated by evaluating the spectral efficiency of the layered channel that is generated by multistage PS-CDMA demodulation. Capacity-approaching codes of high rate is suggested in the encoding for each PSCDMA user, which justifies a low-complexity two-stage decoding scheme that has been recently proposed.
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