Characterization of the Indoor/Outdoor to Indoor MIMO Radio Channel at 2.140 GHz
Wireless Personal Communications: An International Journal
Characteristics of MIMO-OFDM channels in indoor environments
EURASIP Journal on Wireless Communications and Networking
Polarization behavior of discrete multipath and diffuse scattering in urban environments at 4.5 GHz
EURASIP Journal on Wireless Communications and Networking
EURASIP Journal on Wireless Communications and Networking
Impact of clustering in indoor MIMO propagation using a hybrid channel model
EURASIP Journal on Applied Signal Processing
Reduced complexity channel models for IMT-advanced evaluation
EURASIP Journal on Wireless Communications and Networking - Special issue on advances in propagation modelling for wireless systems
On the possibility of applying polarization diversity to MIMO techniques in tunnels
Proceedings of the 12th ACM international conference on Modeling, analysis and simulation of wireless and mobile systems
Wireless Personal Communications: An International Journal
Polarization measurements and modeling in indoor NLOS environments
IEEE Transactions on Wireless Communications
Modelling and Simulation in Engineering - Special issue on Modeling and Simulation of Mobile Radio Channels
Evaluation of cover and reflector in receiver antennas for SM-MIMO wireless communications
Journal of Electrical and Computer Engineering
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We analyze the behavior of a multiple element antenna system in an indoor environment based on the measurements taken in the Lucent Bell Labs building in Crawford Hill, NJ, with a system of 12 transmitters and 15 receivers. In particular, we investigate the capacity behavior with respect to the polarization of the transmitting/receiving elements and the distance between the transmitting and the receiving arrays. The analysis of the power rolloff versus distance clearly demonstrates the different propagation characteristics of the horizontally versus the vertically polarized electric fields. Under strong line-of-sight (LOS) conditions (hallway environment), the power of the horizontally polarized waves falls off faster with distance than that of the vertically polarized fields. Also, the cross-polarization coupling is about -15 dB. Under nonline-of-sight (NLOS) conditions (labs), both polarizations display similar rolloff behavior with distance and the cross-polarization coupling is about 0 dB. There is a power loss of at least 15 dB under NLOS conditions relative to LOS conditions. The average received signal power affects the system capacity. In the hallway, horizontally polarized systems achieve lower capacities than their vertically polarized counterparts. Also the achievable capacity in the labs is much lower than that in the hallway, because of the lower average received power. The comparison of single polarization systems to hybrid polarization systems shows that combined polarization systems perform better in terms of achievable capacity. Therefore, there lies an advantage in using both electric field polarizations. However, under strong LOS conditions the channel itself inherently limits the capacity behavior of the system.