Chapter 13: Radio Links in the Millimeter Wave Band


Nadine Malhouroux-Gaffet, Olivier Veyrunes, Val ry Guillet, Lionel Chaigneaud, Isabelle Siaud, France T l com R&D/DMR, Belfort, France and France T l com R&D/DMR,
Rennes ,France

1 Introduction

Communicating objects represent a subject of much interest in the domain of service creativity or in the field of new implemented techniques. The latter are based on wireless communication systems that combine simplicity set-up with a great use facility. Wireless local area networks (WLAN) are indispensable for communicating objects and their expansion induces an increasing need for research and development on these systems; in particular concerning the increase of data rate.

This increasing need of data exchange associated with pressure on scarce spectrum resources led the manufacturers of WLAN systems to investigate the millimeterfrequency bands (30 to 300 GHz). With such frequencies, the available bandwidth high data rates of about 120 Mb/s to be reached.

However, the "outdoor links" above 10 GHz are affected by atmospheric and weather conditions that are of importance to the link budget. In this context, FTR&D initiated a study to simulate the loss due to hydrometeors (rain, snow etc) above 30 GHz, which is the validity limit of the UIT-R models.

In the field of the local area networks, the band around 60 GHz shows interesting characteristics to optimise the deployment of indoor systems. Indeed, strong attenuation in open space, thus reducing interference between cells , as well as a large available bandwidth, will be a major asset for the realisation of future high data rate indoor systems.




Communicating With Smart Objects(c) Developing Technology for Usable[... ]stems 2003
Linux Troubleshooting for System Administrators and Power Users
ISBN: N/A
EAN: 2147483647
Year: 2005
Pages: 191

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