Title :
Experimental Performance Results of Adaptive Antenna Array System at Base and Mobile Stations in Mobile Environment
Author :
Okino, Kenta ; Tong, Fangwei ; Yamazaki, Chiharu ; Sunaga, T. ; Kato, Masanori ; Kimura, Shigeru
Author_Institution :
Yokohama R&D Center, Kyocera Corp., Yokohama
Abstract :
In a TDD based AAA/SDMA system, the array weights determined from up-link signals are applied to the downlink transmission because of the channel reciprocity. However, under fast fading conditions, for example due to fast moving MS, the array weights are no longer optimum for the downlink signal transmission and hence the spectral efficiency of the system degrades. In this paper, we present the downlink performance of MS with two antenna elements moving at speeds of ~5, 20 and 40 kmph in the field trial system of i-Burst, which is a wireless broadband system employing AAA and SDMA techniques. The field experiment results show that adaptive antenna processing at MS is effective in improving the mobility performance of TDD-AAA/SDMA system
Keywords :
adaptive antenna arrays; broadband networks; mobile radio; radio links; space division multiple access; time division multiplexing; SDMA systems; TDD; adaptive antenna array system; base stations; channel reciprocity; downlink signal transmission; mobile environment; mobile stations; wireless broadband system; Adaptive arrays; Adaptive systems; Antenna arrays; Broadband antennas; Fading; Land mobile radio; Mobile antennas; Mobile communication; Multiaccess communication; Transmitting antennas;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2006 IEEE 17th International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
1-4244-0329-4
Electronic_ISBN :
1-4244-0330-8
DOI :
10.1109/PIMRC.2006.254318
