NDLI: Multiuser Detection Techniques for TH-PPM Systems

Content Provider	IEEE Xplore Digital Library
Author	Adlakha, S. Mallik, R.K. Vazirani, A.
Copyright Year	2006
Description	Author affiliation: Tejas Networks India Ltd., 58, 1st Main Road, J. P. Nagar, 3rd Phase, Bangalore 560076, India. E-mail: vazirani_anshu@yahoo.com (Vazirani, A.) \|\| Department of Electrical Engineering, Indian Institute of Technology - Delhi, Hauz Khas, New Delhi 110016, India. E-mail: rkmallik@ee.iitd.ernet.in (Mallik, R.K.) \|\| Department of Electrical Engineering, Stanford University, 161 Packard Building, 350 Serra Mall, Stanford, CA 94305-9505, U.S.A. E-mail: adlakha@stanford.edu (Adlakha, S.)
Abstract	This paper investigates detection mechanisms for time hopping pulse position modulated multiple access systems in both additive white Gaussian noise environment and fading environment. In such systems, the raw data is not linearly related to the received signal. One technique is to express the pulse position modulated signal as the sum of linearly modulated signals with the input being a nonlinear function of the raw data. This reduces the system to an equivalent pulse amplitude modulated system with significant increase in complexity. We present two new lower complexity detectors. The first detector uses the properties of the pulse correlation matrix to develop a lower complexity detector. The second detector relies on the knowledge of the time-hopping sequence to despread the received signal. The detection is then done on chip-by-chip basis. The performance of these detectors is compared in terms of the probability of at least one user being in error and the average number of correctly decoded users.
Starting Page	4959
Ending Page	4964
File Size	190225
Page Count	6
File Format	PDF
ISBN	1424403553
ISSN	81649547
DOI	10.1109/ICC.2006.255451
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-11
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Multiuser detection Pulse modulation Detectors Electronic mail AWGN Additive white noise Space vector pulse width modulation Transmitters Phase detection Phase modulation
Content Type	Text
Resource Type	Article

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