PERFORMANCE IMPROVEMENT AND COMPLEXITY REDUCTION IN MULTI-USER DETECTION USING PARTIAL PRE-CODING TECHNIQUES
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Abstract
In this paper, partial pre-coding method has been developed to solve the Multiple Access Interference (MAI) and computational complexity problems. This is done by selectively pre-decorrelating users to destructive interference while allowing interference when it is expected to contribute to their signal. The resulting SNR improvement is achieved by making use of energy existent in the system so performance enhancement is attained without the need for increased transmitted power-per-user. The proposed technique applies to the downlink of cellular Code Division Multiple Access (CDMA) systems. Theoretical analysis and comparative simulations show that signi?cant performance improvement and computational complexity can be attained with the proposed technique.
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