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

fYear

2006

fDate

11-14 Sept. 2006

Firstpage

1

Lastpage

5

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/PIMRC.2006.254318

Filename

4022676