Summary
International Symposium on Antennas and Propagation
2015
Session Number:S2.12
Session:
Number:S2.12.3
Comparison of 2-bitstream Polarization-MIMO Performance of 2 and 4-port Bowtie Antennas for LTE in Random-LOS
Sadegh Mansouri Moghaddam, Andres Alayon Glazunov, Jian Yang, Mattias Gustafsson, Per-Simon Kildal,
pp.-
Publication Date:2015/11/9
Online ISSN:2188-5079
Summary:
We evaluate the performance of a dual-polarized wideband antenna in terms of polarization-MIMO in Random-LOS for two different modes of operation: 2 and 4-port excited mode. The 2-port mode was obtained by differential excitation of two opposite ports of the 4-port design by using two baluns. The Zero-Forcing receiver throughput is evaluated based on the Probability of Detection of two bitstreams when orthogonal polarizations provide the MIMO subchannels. Assuming a uniform distribution for the Angle of Arrivals and orthogonally polarized waves incident on the antennas, the overall PoD over coverage cones of 30°, 60° and 90° are presented. The 2-bitstream multiplexing MIMO efficiency defined at the 95% Probability of Detection is evaluated for the two modes of operation at different frequencies and for different coverage cones. The 2-bitstream coverage pattern of the antenna for the two modes are plotted over the range of Angles-of-Arrival (AoA), by choosing fixed polarization (horizontal and vertical) for the incoming waves. The coverage pattern is significantly degraded for the 2-port mode, in particular in the middle of the band.