Antenna spacing in MIMO indoor channels

We study the relation between antenna spacing and capacity of MIMO channels for indoor environments using a ray tracing program. It has been confirmed also by measurements that in rich scattering environments an antenna spacing below 0.5/spl lambda/ is sufficient to reach nearly the full capacity predicted for multiple-antenna arrays in ideal and uncorrelated Rayleigh fading channels.

[1]  Theodore S. Rappaport,et al.  A ray tracing method for predicting path loss and delay spread in microcellular environments , 1992, [1992 Proceedings] Vehicular Technology Society 42nd VTS Conference - Frontiers of Technology.

[2]  Joseph M. Kahn,et al.  Fading correlation and its effect on the capacity of multi-element antenna systems , 1998, ICUPC '98. IEEE 1998 International Conference on Universal Personal Communications. Conference Proceedings (Cat. No.98TH8384).

[3]  Joseph M. Kahn,et al.  Fading correlation and its effect on the capacity of multielement antenna systems , 2000, IEEE Trans. Commun..

[4]  Volker Jungnickel,et al.  A physical model of the wireless infrared communication channel , 2002, IEEE J. Sel. Areas Commun..

[5]  Chen-Nee Chuah,et al.  Capacity growth of multi-element arrays in indoor and outdoor wireless channels , 2000, 2000 IEEE Wireless Communications and Networking Conference. Conference Record (Cat. No.00TH8540).

[6]  Alister G. Burr.  Channel Capacity Evaluation of Multi-Element Antenna Systems Using a Spatial Channel Model , 2000 .

[7]  D. Hampicke,et al.  Identification of time-variant directional mobile radio channels , 1999, IMTC/99. Proceedings of the 16th IEEE Instrumentation and Measurement Technology Conference (Cat. No.99CH36309).

[8]  Gerard J. Foschini,et al.  Layered space-time architecture for wireless communication in a fading environment when using multi-element antennas , 1996, Bell Labs Technical Journal.