Simulation of MIMO Channel Capacity With Antenna Polarization Diversity

Authors:

Liang Dong, Hosung Choo, Hao Ling, and Robert W. Heath Jr,

Reference:

IEEE Trans. Wireless, , vol. 4, no. 4, pp. 1869-1873, July 2005.

Abstract:

A simulation study of the channel capacity of a MIMO system based on antenna polarization diversity is carried out. We focus on a simple yet realistic tri-monopole antenna structure, taking into account of all the mutual coupling and casing effects using the computational electromagnetics solver NEC. Simulation results show that using the tri-monopole antennas can offer channel capacity that approaches the capacity of an uncorrelated MIMO Rayleigh channel. In addition, it is shown that the capacity increase is mainly attributed to polarization diversity instead of pattern diversity. We also find that the mutual coupling and casing effects in the tri-monopole system can actually provide a large capacity increase with less constraint on the antenna configurations than the idealized tri-dipole system. Furthermore, in contrast to spatially diverse systems, the capacity increase from the polarization diverse system is less sensitive to the different multipath environments.

Keywords:

Antenna Arrays, Array Signal Processing, Mutual Coupling

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