Improved Cooperative CDMA Using Blind Adaptive Interference Cancellation

Shakya, I, Ali, F H and Stipidis, E (2008) Improved Cooperative CDMA Using Blind Adaptive Interference Cancellation. In: 5th International Conference on Broadband Communications Networks and Systems, SEP 08-11, 2008, London, ENGLAND.

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In this paper, we introduce blind adaptive interference cancellation for a practical uplink CDMA effected by multiple access interference (MAI) in cooperative communications systems scenario. During the collaboration phase, each paired users exchange their data to communicate with the base-station by using their own and pairing users' channels to achieve the spatial diversity. The base-station performs ranking of users' power and detects the strongest using the successive interference cancellation (SIC) principle to gradually remove MAI from the desired signals. The proposed scheme uses an improved SIC which performs adaptive despreading to form better estimates of users' data and then uses blind MAI estimation and cancellation by making use of the despreader weights to minimize the residual MAI. Simulation results show that the scheme achieves better diversity gain and allows much higher number of users to share the same bandwidth compared with conventional cooperative schemes.

Item Type: Conference or Workshop Item (Paper)
Schools and Departments: School of Engineering and Informatics > Engineering and Design
Depositing User: Indu Lal Shakya
Date Deposited: 06 Feb 2012 19:29
Last Modified: 11 Apr 2012 11:18
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