Quantifying the Degradation of Combined MUI and Multipath Effects in Impulse-Radio UWB

We study pulse-based ultra wideband (UWB) communications over multipath channels using asynchronous spread spectrum (SS) multiple access (MA) based on time-hopping (TH) and pulse position modulated (PPM) signals. More specifically, we analyze the signal-to-interference (SIR) degradation in the prese...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2007-08, Vol.6 (8), p.2831-2836
Main Author: Ramirez Mireles, Fernando
Format: Article
Language:English
Subjects:
Additive white noise
Applied sciences
AWGN
Channels
Degradation
Equipments and installations
Exact sciences and technology
Gain
Gaussian
Interference
Multipath channels
Multiple access
Power control
Pulse modulation
Radio link
Radiocommunications
Radiorelay links
Signal analysis
Spread spectrum communication
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
Ultra wideband technology
Wideband
Wireless communication
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Summary:We study pulse-based ultra wideband (UWB) communications over multipath channels using asynchronous spread spectrum (SS) multiple access (MA) based on time-hopping (TH) and pulse position modulated (PPM) signals. More specifically, we analyze the signal-to-interference (SIR) degradation in the presence of additive white Gaussian noise (AWGN), multi-user interference (MUI), and dense multipath effects (DME) with line-of-sight (LOS) and non-line-of-sight (NLOS). In particular, we define a degradation margin factor for the combined MUI and multipath effects and also find an expression for the maximum number of simultaneous radio links N u in terms of the operating SIR, the SS processing gain, and the bit transmission rate R b . We consider both cases with perfect and imperfect power control.
ISSN:1536-1276
1558-2248
DOI:10.1109/TWC.2007.06115