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Soft Interference Cancellation and Channel Estimation in Uncoded Asynchronous DS-CDMA System

Xiao, P and Strom, E (2004) Soft Interference Cancellation and Channel Estimation in Uncoded Asynchronous DS-CDMA System In: IEEE VTC, 2004-05-17 - 2004-05-19.

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The conventional interference cancellation receiver is subject to performance degradation due to incorrect decisions on interference subtracted from the received signal. This paper aims at deriving algorithms to improve the performance of interference cancellation and channel estimation in an uncoded asynchronous DS-CDMA system with orthogonal modulation. Two soft cancellation schemes, one based on the maximum a posterior (MAP), the other based on the nonlinear minimum mean square error (MMSE) criterion are presented and proved to be superior to the conventional PIC scheme with minor increase in complexity. Furthermore, the best system performance (2dB gain in a 21-user system) is observed when the derived soft information is also used for channel estimation.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Authors :
Xiao, P
Strom, E
Date : 17 May 2004
DOI : 10.1109/VETECS.2004.1390543
Contributors :
Additional Information : © 2004 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Depositing User : Symplectic Elements
Date Deposited : 15 Nov 2013 12:30
Last Modified : 31 Oct 2017 15:12

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