Research Article
UWB-based sensor networks and the IEEE 802.15.4a standard - a tutorial
@INPROCEEDINGS{10.1109/CHINACOM.2006.344917, author={Andreas F. Molisch and Philip Orlik and Zafer Sahinoglu and Jin Zhang}, title={UWB-based sensor networks and the IEEE 802.15.4a standard - a tutorial}, proceedings={1st International ICST Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2007}, month={4}, keywords={}, doi={10.1109/CHINACOM.2006.344917} }- Andreas F. Molisch
Philip Orlik
Zafer Sahinoglu
Jin Zhang
Year: 2007
UWB-based sensor networks and the IEEE 802.15.4a standard - a tutorial
CHINACOM
IEEE
DOI: 10.1109/CHINACOM.2006.344917
Abstract
This paper gives a tutorial overview of ultrawide-band communications systems for sensor networks. In particular, we describe the IEEE 802.15.4a standard, which is currently being developed. While most nodes (reduced-function devices) in sensor networks usually have to consume little energy, and are constrained with respect to the complexity of the processing they can perform, some nodes (full-function devices) do not show these restrictions. We describe a hybrid modulation, coding, and multiple access scheme that is particularly suited for heterogeneous networks that contain both FFDs and RFDs. The scheme is a generalization of the well-known time-hopping impulse radio (TH-IR). It employs systematic coding, joint pulse-position modulation and phase shift keying, as well as a combination of polarity scrambling and time-hopping. We also describe two-way ranging algorithms that serve as the basis for geolocation in 802.15.4a, and we discuss the methods for how the ranging information can be kept secret from snoopers.