Performance analysis of IR-UWB in a multi-user environment

In Impulse Radio Ultra Wide Band (IR-UWB) based systems, we show that the Multi-User Interference (MUI) assuming fixed spreading codes can be well approximated by a Generalized-Gaussian Distribution (GGD). Then, we derive an accurate closed-form expression of the approximation for the Average Error...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2009-11, Vol.8 (11), p.5552-5563
Main Authors: Kharrat-Kammoun, F., Le Martret, C.J., Ciblat, P.
Format: Article
Language:English
Subjects:
Amplitude modulation
Applied sciences
Approximation
Closed-form solution
Coding, codes
Error probability
Exact sciences and technology
Exact solutions
Fading
fixed spreading codes
Gaussian approximation
Generalized-Gaussian Distribution
Impulse radio ultra wide band
Information, signal and communications theory
Interference
Mathematical analysis
multi-user interference
Multipath channels
Multiple access
Optimization
Performance analysis
Pulse modulation
Signal and communications theory
Spreading
Telecommunications and information theory
Ultra wideband technology
Ultrawideband
Wireless communication
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Summary:In Impulse Radio Ultra Wide Band (IR-UWB) based systems, we show that the Multi-User Interference (MUI) assuming fixed spreading codes can be well approximated by a Generalized-Gaussian Distribution (GGD). Then, we derive an accurate closed-form expression of the approximation for the Average Error Probability (AEP) in both Direct-Sequence (DS) and time-hopping (TH) multiple access context. From this approximation, we are able to characterize and to select the set of codes minimizing the AEP for both multiple access techniques. The merit of each multiple access technique is then analyzed: we especially prove that the probability to find an optimal pair of codes goes to one when increasing the number of chips per symbol with TH technique whereas this probability goes to zero with DS technique. Numerical illustrations confirm our claims.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2009.081023