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Dynamic grouped chip-level iterated multiuser detection based on Gaussian forcing technique

Wathan, F, Hoshyar, R and Tafazolli, R (2008) Dynamic grouped chip-level iterated multiuser detection based on Gaussian forcing technique IEEE COMMUNICATIONS LETTERS, 12 (3). 167 - 169. ISSN 1089-7798

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Abstract

The brute-force MAP-based Chip-Level Iterated (CLi) Multiuser Detection techniques exploiting the newly proposed Low-Density Signature (LDS) structure have been shown to approach the performance of Single-User even at overloading condition of up to 200%. However, their complexity is exponential to the number of interfering users in a chip that can be impractical. In this letter, by using Gaussian-Forcing (GF) technique, we trade-off performance and complexity and it results in a dynamic Grouped GF (G-GF) CLi MUD technique. We show via computer simulation, at the system with 200% condition, the loss of approximately 0.3 dB compared to its brute-force counterpart is observed while reducing the complexity to more than half.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Technology, Telecommunications, low-density signature, synchronous overloaded CDMA, chip-level iterated MUD, dynamic user grouping, Gaussian-forcing technique, CAPACITY, CODES
Related URLs:
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Centre for Communication Systems Research
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:44
Last Modified: 23 Sep 2013 18:35
URI: http://epubs.surrey.ac.uk/id/eprint/1813

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