Sylvain Collonge

Wideband and dynamic characterization of the 60GHZ indoor radio propagation — future homeWLAN architectures

This paper presents some results of a study concerning the radio propagation at 60GHZ in residential environments performed by theIETR (Electronic and Telecommunication Institute of Rennes, France). This study is part of aRNTR project named “COMMINDOR”. This exploratory project concerns the very high data rate (155 Mbit/s) and small range (about 10 m) radio communication systems for future home networks, which will permit multimedia equipment interconnection and control.The study is based on several measurement campaigns realized with a channel sounder based on the sliding correlation technique. This channel sounder has a 500MhZ bandwidth and a 2.3 ns effective time resolution. The measurements have been performed in residential furnished environments. The study of the angles-of-arrival (AOA) emphases the importance of openings (such as doors, staircase, etc.) for the radio propagation between adjacent rooms. A particular attention is paid to the influence of human activity on radio propagation. It is shown that people movements can make the propagation channel unavailable during about one second. From the characterization study of the indoor radio propagation, several recommendations concerning the deployment of the very high data rate 60GHZ wireless networks are derived.RésuméCet article présente une partie des résultats de la caractérisation de la propagation radioélectrique à 60GHZ en environnement résidentiel, menée par l’IETR. Cette étude s’inscrit dans le cadre du projetRNTR intitulé «OMMINDOR». Ce project exploratoire s’intéresse aux systèmes de radiocommunications à très haut débit (155 Mbit/s) et courte portée (dizaine de mètres) pour les futurs réseaux domestiques, permettant l’interconnexion et le contrôle d’équipements multimédias grand public.L’étude repose sur des campagnes de mesures effectuées avec un sondeur de canal utilisant la technique du corrélateur glissant, ayant une bande d’analyse de 500MhZ et une résolution temporelle effective de 2,3 ns. Les mesures se sont déroulées dans des environnements résidentiels meublés. L’étude des angles d’arrivée des ondes souligne le rôle des ouvertures (telles que les portes, les escaliers, etc.) dans la propagation entre pièces. Une attention particulière est accordée à l’influence de l’activité humaine sur la propagation. Il en ressort que les déplacements des personnes peuvent rendre le canal indisponible pour des durées de l’ordre de la seconde. À partir de la caractérisation du canal de propagation, plusieurs recommandations concernant le déploiement de réseaux sans fil à très haut débit à 60 GHz en milieu résidentiel sont proposées.

Comparison of measurements and simulations in indoor environments for wireless local networks at 60 GHz

Indoor wireless local networks (WLAN) development in the millimetre band gives new perspectives, which are very promising in terms of announced data rate and offered services. Nevertheless strong free space attenuation as well as pieces of furniture and wall attenuations result in difficult propagation conditions. A French research project (RNRT COMMINDOR) has been set up to study and design new high data rate (155 Mbit/s) radiocommunication systems at 60 GHz in an indoor environment. SIRADEL takes part in this project by modelling the propagation phenomenon thanks to a ray-tracing tool associated to the Uniform Theory of Diffraction (UTD). Simulations are then compared to measurements realised within the framework of this project by the LCST Laboratory of INSA Rennes. The good behaviour of the propagation model is analysed for LOS and NLOS situations.

Spatial Characterization of 60 GHz Indoor Channels by Fast Gaussian Beam Tracking Method and Comparison with Measurements

A new three dimensional Gaussian beam tracking (GBT) method is proposed for indoor spatio-temporal indoor channel characterization. Its efficiency stems from the collective treatment of rays, which is realized by using Gaussian beams to propagate fields. A direction of arrival (DOA) measurements campaign in a typical European residential house at 60 GHz is carried out. The validity of the GBT method is shown by comparing its numerical results with measurements