National Taiwan Ocean University Institutional Repository:Item 987654321/32895
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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/32895

Title: Multiuser detection assisted near-real-time symbol transmission for relay CDMA systems
Authors: Hoang-Yang Lu;Ming-Ju Yang
Contributors: NTOU:Department of Electrical Engineering
Date: 2012-05
Issue Date: 2012-06-18T07:47:57Z
Publisher: International Conference on Systems and Informatics (ICSAI)
Abstract: abstract:In this paper, we present a two-stage multiuser detection (MUD) scheme for near-real-time relay CDMA systems. Relay communications have received intensive research attention recently because of their benefit of spatial diversity. However, existing works generally have serious latency problems, which will reduce transmission rates. To solve the problems, we consider a near-real-time transmission strategy for relay CDMA systems. Also, a two-stage MUD scheme is proposed for the detectors at the relays and the destination node to ensure the feasibility of the transmission strategy. The proposed MUD scheme first conducts the zero forcing (ZF) method to suppress the multiple access interfere and then uses the maximum likelihood (ML) mechanism to estimate the transmitted symbols. Specially, the two-stage MUD scheme only requires few computations to conduct the ML mechanism. Simulation results and complexity analysis show that the proposed scheme can not only provide significant diversity gain with a modest computational complexity but also assist relay CDMAs to facilitate the near-real-time transmission.
Relation: pp.1436-1440
URI: http://ntour.ntou.edu.tw/handle/987654321/32895
Appears in Collections:[Department of Electrical Engineering] Lecture & Seminar

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