Performance of cooperative CDMA with successive interference cancellation

Indu Shakya, Falah H. Ali, Elias Stipidis

Research output: Chapter in Book/Conference proceeding with ISSN or ISBNConference contribution with ISSN or ISBNpeer-review

Abstract

We investigate the BER and achievable rate of user cooperation schemes in practical uplink CDMA channels with multiple access interference (MAI). It is shown that when the system loading increases, cooperation alone becomes less effective if simple matched filters (MF) followed by combining from each partners' signals are employed for obtaining decision variables. By performing successive interference cancellation (SIC) for each received signals from the partners and then using the maximum ratio combining technique, the diversity gain and hence the uplink capacity is enhanced. We further analyse the output decision variable signals and also provide a simplified bound on achievable rate based on Gaussian Approximation of MAI signals. Illustrative simulation results are given, which confirm that the proposed scheme using SIC achieves much improved diversity and error performance under high system loading and nearfar conditions.

Original languageEnglish
Title of host publication5th International Conference on Broadband Communications, Networks, and Systems, BROADNETS 2008
Pages377-382
Number of pages6
DOIs
Publication statusPublished - 1 Dec 2008
Event5th International Conference on Broadband Communications, Networks, and Systems, BROADNETS 2008 - London, United Kingdom
Duration: 8 Sep 200811 Sep 2008

Conference

Conference5th International Conference on Broadband Communications, Networks, and Systems, BROADNETS 2008
CountryUnited Kingdom
CityLondon
Period8/09/0811/09/08

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