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Efficient DS-UWB MUD Algorithm Using Code Mapping and RVM
Joint Authors
Liu, Xiaohui
Shi, Pingyan
Tao, Xiaofeng
Ji, Jianchao
Source
Mathematical Problems in Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-02-09
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
A hybrid multiuser detection (MUD) using code mapping and a wrong code recognition based on relevance vector machine (RVM) for direct sequence ultra wide band (DS-UWB) system is developed to cope with the multiple access interference (MAI) and the computational efficiency.
A new MAI suppression mechanism is studied in the following steps: firstly, code mapping, an optimal decision function, is constructed and the output candidate code of the matched filter is mapped to a feature space by the function.
In the feature space, simulation results show that the error codes caused by MAI and the single user mapped codes can be classified by a threshold which is related to SNR of the receiver.
Then, on the base of code mapping, use RVM to distinguish the wrong codes from the right ones and finally correct them.
Compared with the traditional MUD approaches, the proposed method can considerably improve the bit error ratio (BER) performance due to its special MAI suppression mechanism.
Simulation results also show that the proposed method can approximately achieve the BER performance of optimal multiuser detection (OMD) and the computational complexity approximately equals the matched filter.
Moreover, the proposed method is less sensitive to the number of users.
American Psychological Association (APA)
Shi, Pingyan& Liu, Xiaohui& Tao, Xiaofeng& Ji, Jianchao. 2016. Efficient DS-UWB MUD Algorithm Using Code Mapping and RVM. Mathematical Problems in Engineering،Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1111820
Modern Language Association (MLA)
Shi, Pingyan…[et al.]. Efficient DS-UWB MUD Algorithm Using Code Mapping and RVM. Mathematical Problems in Engineering No. 2016 (2016), pp.1-9.
https://search.emarefa.net/detail/BIM-1111820
American Medical Association (AMA)
Shi, Pingyan& Liu, Xiaohui& Tao, Xiaofeng& Ji, Jianchao. Efficient DS-UWB MUD Algorithm Using Code Mapping and RVM. Mathematical Problems in Engineering. 2016. Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1111820
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1111820