Gain of spatial diversity techniques in ...
Document type :
Communication dans un congrès avec actes
Title :
Gain of spatial diversity techniques in tunnel environment
Author(s) :
Lienard, Martine [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Molina-Garcia-Pardo, Jose Maria [Auteur]
Departamento de Tecnologia de la informacion y las Communicationes [TIC]
degauque, pierre [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Gaillot, Davy [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Molina-Garcia-Pardo, Jose Maria [Auteur]
Departamento de Tecnologia de la informacion y las Communicationes [TIC]
degauque, pierre [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Gaillot, Davy [Auteur]

Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Conference title :
17th WSEAS International Conference on Communications, CIRCOM 2013
City :
Rhodes Island
Country :
Grèce
Start date of the conference :
2013
Book title :
Proceedings of 17th WSEAS International Conference on Communications, CIRCOM 2013
Publisher :
WSEAS
Publication date :
2013
English abstract : [en]
It is well known that diversity techniques improve the signal to noise ratio and are thus widely used both for SIMO or MIMO configurations. Their performances, described in the literature, are based on the assumption of a ...
Show more >It is well known that diversity techniques improve the signal to noise ratio and are thus widely used both for SIMO or MIMO configurations. Their performances, described in the literature, are based on the assumption of a Rayleigh or Rice fading distribution of the electric field. However, in tunnels, the channel characteristics are quite different than in indoor or urban environment due to the guiding effect of the geometrical structure. Therefore, one can wonder if diversity or adaptive beamforming techniques remain an attractive way to improve the SNR, keeping in mind their possible complexity. Measurements have been carried out in a long road tunnel at 2.8 GHz to deduce the MIMO channel matrices. The channel characteristics, expressed in terms of correlation between array antenna elements, distribution of the singular values of the MIMO transfer matrices and eigen directions, are studied as a function of the distance between the transmitter and the receiver. Then diversity gains for different diversity techniques and eigen-beamforming are compared. A simple approach based on broadside antenna arrays has also been studied and it is shown that, in terms of SNR, it gives the best compromise between efficiency and complexity.Show less >
Show more >It is well known that diversity techniques improve the signal to noise ratio and are thus widely used both for SIMO or MIMO configurations. Their performances, described in the literature, are based on the assumption of a Rayleigh or Rice fading distribution of the electric field. However, in tunnels, the channel characteristics are quite different than in indoor or urban environment due to the guiding effect of the geometrical structure. Therefore, one can wonder if diversity or adaptive beamforming techniques remain an attractive way to improve the SNR, keeping in mind their possible complexity. Measurements have been carried out in a long road tunnel at 2.8 GHz to deduce the MIMO channel matrices. The channel characteristics, expressed in terms of correlation between array antenna elements, distribution of the singular values of the MIMO transfer matrices and eigen directions, are studied as a function of the distance between the transmitter and the receiver. Then diversity gains for different diversity techniques and eigen-beamforming are compared. A simple approach based on broadside antenna arrays has also been studied and it is shown that, in terms of SNR, it gives the best compromise between efficiency and complexity.Show less >
Language :
Anglais
Peer reviewed article :
Oui
Audience :
Non spécifiée
Popular science :
Non
Source :