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A Packet-Level Model for UWB Channel with People Shadowing Process Based on Angular Spectrum Analysis
| Citations: | 4 - 2 self |
BibTeX
@MISC{Zhang_apacket-level,
author = {Ruonan Zhang and Lin Cai},
title = {A Packet-Level Model for UWB Channel with People Shadowing Process Based on Angular Spectrum Analysis},
year = {}
}
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Abstract
Abstract—Ultra-wideband (UWB) wireless communication technologies have been proposed to support high data rate multimedia services in office or residential environments. Due to the low transmission power of UWB, the shadowing effect by moving people can considerably reduce the received signal quality and thus significantly degrade the quality of service (QoS) of on-going transmissions. An open issue is to build a simple model which captures the temporal variation of UWB channels and the packet error rate (PER) due to the people shadowing effect (PSE), which will be a useful tool for upper layer protocol performance analysis and simulation. This paper presents an analytical study of the PSE and the temporal variation of UWB channels induced by the motion of a person. First, we derive the angular power spectral density (APSD) of the indoor UWB channel impulse response (CIR), and the PSE in terms of signal power attenuation. Second, based on a two-dimensional random walk mobility model, the PER variation due to people shadowing is modeled as a finite-state Markov chain (FSMC). The investigation of APSD provides important insights on the spatial propagation characteristics of UWB signals. The proposed packet-level channel model can be conveniently incorporated into analytical frameworks and simulation tools for evaluating upperlayer protocols of UWB networks. Index Terms—Channel model, UWB, angular power spectral density, shadowing effect. I.
Keyphrases
uwb channel people shadowing process packet-level model angular spectrum analysis temporal variation angular power spectral density on-going transmission upperlayer protocol packet error rate high data rate multimedia service residential environment per variation simulation tool indoor uwb channel impulse response packet-level channel model upper layer protocol performance analysis signal power attenuation uwb signal wireless communication technology simple model spatial propagation characteristic index term channel model low transmission power mobility model analytical study open issue analytical framework useful tool two-dimensional random received signal quality uwb network abstract ultra-wideband important insight finite-state markov chain
