Title :
Dependency on Beamwidth in an SD Method Utilizing Two-Ray Fading Characteristics
Author :
Hiraga, Ken ; Sakamoto, Kazumitsu ; Arai, Maki ; Seki, Tomohiro ; Toshinaga, Hideki ; Nakagawa, Tadao ; Uehara, Kazuhiro
Author_Institution :
NTT Network Innovation Labs., Yokosuka, Japan
Abstract :
Using ray-tracing propagation calculation, we clarify the dependency on antenna element beamwidth of the channel capacity of a spatial division (SD) transmission method utilizing the characteristics of two-ray fading. It was clarified that the SD transmission method can be effectively applied to microstrip antennas or horn antennas with beamwidth of more than 10 °, but that it is not effective when applied to narrow-beam antennas with less than 10 ° beamwidth. In such cases, simple parallel transmission is a better way to utilize the narrow beam to increase channel capacity .
Keywords :
MIMO communication; antenna radiation patterns; fading channels; horn antennas; microstrip antennas; SD method; SD transmission method channel capacity; beamwidth dependency; horn antenna element beamwidth; microstrip antenna; multiple input multiple output technology; narrow beam antenna; ray fading characteristics; ray-tracing propagation calculation; spatial division transmission method; Antenna radiation patterns; Channel capacity; Dielectrics; Gain; Transmitting antennas; Beamwidth; parallel transmission; spatial division transmission; two-ray ground reflection;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2355258
