Title :
Evaluation of SDMA employing vertical pattern and polarization control in actual cellular environment measurement
Author :
Nishimori, Kentaro ; Cho, Keizo
Author_Institution :
NTT Network Innovation Labs., NTT Corp., Kanagawa, Japan
Abstract :
This paper investigates the transmission quality of a proposed space division multiple access (SDMA) configuration that employs a smart antenna that adopts vertical pattern and polarization control with terminal polarization assignment in an actual cellular environment in an urban area in Japan. In a sector cell system, we clarified that this configuration is effective based on an evaluation of the spatial correlation characteristics. We also found that the output carrier to interference and noise power ratio (CINR) of the proposed configuration is from 10 to 17 dB higher than that of the conventional SDMA configuration when the number of users is greater than four. The proposed configuration can reduce the antenna size from 1/15 to 1/60 compared to conventional SDMA.
Keywords :
adaptive antenna arrays; antenna radiation patterns; cellular radio; electromagnetic wave polarisation; space division multiple access; Japan; SDMA; carrier to interference and noise power ratio; cellular environment measurement; output CINR; polarization control; reduced antenna size; sector cell system; smart antenna; space division multiple access; spatial correlation characteristics; terminal polarization assignment; transmission quality; urban area; vertical pattern; Antenna measurements; Area measurement; Cellular networks; Interference; Multiaccess communication; Polarization; Signal to noise ratio; Space technology; Urban areas; Working environment noise;
Conference_Titel :
Vehicular Technology Conference, 2004. VTC 2004-Spring. 2004 IEEE 59th
Print_ISBN :
0-7803-8255-2
DOI :
10.1109/VETECS.2004.1387951
