Multi-User Detection Techniques for DS-CDMA UWB System


Article Preview

Ultra-wideband(UWB) is currently one of three new technologies of wireless communication. Multi-user detection technique is mainly used to eliminate multiple access interference(MAI)in DS-CDMA UWB communication systems. Linear multi-user detection algorithm for multi-access interference suppression or even elimination has certain results. But for a fixed decision threshold is set to 0, the detection performance of linear multi-user detection algorithm will be decreased significantly. Therefore a kind of multi-user detection with pre-processing has been researched. Through the pre-processing, we set dynamic threshold to direct decision the user's data bit information so as to solve the problem the linear multi-user detector’s decision threshold which is fixed impact the detection performance. We may get the global optimal solution though pre-processing of using the thought of the branch and bound algorithm and forcing rules. Then the original problem changes into a smaller multi-user detection problem, in order to get the aim of reducing MAI, increasing the probability of a correct decision and reducing the bit error rate. From the simulation experiment results, it is shown that it has a significant effect in system detection, because after pre-processing the probability of a correct decision has increased, and the bit error rate has been reduced.



Advanced Materials Research (Volumes 204-210)

Edited by:

Helen Zhang, Gang Shen and David Jin






N. P. Liu et al., "Multi-User Detection Techniques for DS-CDMA UWB System", Advanced Materials Research, Vols. 204-210, pp. 872-878, 2011

Online since:

February 2011




[1] Shayesteh, Mahrokh G, Nasiri-Kenari, Masoumeh. A new TH/DS-CDMA scheme for UWB communication systems and its performance analysis[A]. 2006 IEEE Radio and Wireless Symposium[C], San Diego, CA, United states, 2006, 147-150.

DOI: 10.1109/rws.2006.1615116

[2] Eran Fishler, H. Vincent Poor. Low-Complexity Multiuser Detectors for Time-Hopping Impulse-Radio Systems[J]. IEEE Transactions on Signal Processing, 2004, 52(9): 2561-2571.

DOI: 10.1109/tsp.2004.832017

[3] Shubao Liu, Jun Wang, Blind Adaptive Multiuser Detection Using a Recurrent Neural Network[J]. IEEE Trans Commun, 2004, 7(4): 1071-1705.

DOI: 10.1109/icccas.2004.1346362

[4] Schlegel C. Multi-user detection via iterative processing[A]. 2000 IEEE Wireless Communications and Networking Conference[C], 2000, 1030-1034.

DOI: 10.1109/wcnc.2000.904769

[5] M Honig, U Mahow, S Verdu. Blind adaptive multiuser detection[J]. IEEE Trans. Signal Processing, 1995, 40(4): 944-960.

DOI: 10.1109/18.391241

[6] Qinghua Li, Leslie A. Rusch. Multiuser Detection for DS-CDMA UWB in the Home Environment[J]. IEEE communication, 2002, 20(9): 1701-1712.

DOI: 10.1109/jsac.2002.805241

[7] Q. Li and L. A. Rusch. Multiuser receivers for DS-CDMA UWB[A]. Proc. IEEE Conf. Ultra Wideband Systems Technology[C], 2002, 163-167.

DOI: 10.1109/uwbst.2002.1006339

[8] Lars P. B. Christensen. A Low-Complexity Joint Synchronization and Detection Algorithm for Single-Band DS-CDMA UWB Communications[J]. EURASIP Journal on Applied Signal Processing 2005: 3, 462-470.

DOI: 10.1155/asp.2005.462

[9] Xiong Zhangliang, Xiang Quanshi. A novel multi-user detector in UWB communication systems[A]. 2004 IEEE Sensor Array and Multichannel Signal Processing Workshop[C], Barcelona, Spain, 2005, 129-132.

DOI: 10.1109/sam.2004.1502922

[10] YiHai, Zhang, Wu-Sheng, Lu, Gulliver. Recursive multiuser detection for DS-UWB systems[A]. T.A. 2005 IEEE Pacific Rim Conference Communications, Computers and Signal Processing[C], 2005, 534-537.

DOI: 10.1109/pacrim.2005.1517344

In order to see related information, you need to Login.