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A New Improved First-Order Approximate Decorrelating Detector for DS-CDMA Communication Systems

Authors:	Chen Wanshi Do Manh Anh

Affiliation:	(1) Integrated Systems Research Laboratory, Division of Circuit and Systems, School of Electrical and Electronic Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore

Abstract:	An improved first-order approximate decorrelating detector for direct-sequencecode divisionmultiple access (DS-CDMA) communication systems is proposed. This detector isbased on theminimization of the multiple access interference (MAI) for each user. Throughanalysis andnumerical results, the detector is shown to perform better than the originalfirst-order approximatedetector in various conditions at the expense of an additional complexity onthe order of O(K²), whereK is the number of active users in the system.

Keywords:	code division multiple access multiuser detection decorrelating detector
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