Development of cellular repeater system with multiple radio echo suppresser

Author

Maeyama, Toshiyuki ; lnoue, T.

Author_Institution

KDDI R&D Lab. Inc., Saitama, Japan

Volume

4

fYear

2004

fDate

5-8 Sept. 2004

Firstpage

2323

Abstract

We designed a cellular repeater system with a function of suppressing radio echoes that occur between antennas set in the direction of base station and mobile stations. The designed system can automatically detect and suppress radio echoes due to reflected waves from surrounding structures as well as that due to direct antenna coupling. Based on the designed system, we developed a 2-GHz band repeater applicable to the cdma2000 system, and we confirmed through field trials that the repeater can operate at a gain of more than 80 dB when antennas set in the direction of a base station and mobile stations are mounted on the same pole, when a multiple radio echo suppresser is activated.

Keywords

3G mobile communication; antennas; cellular radio; echo suppression; radio repeaters; 2 GHz; cdma2000 system; cellular repeater system; direct antenna coupling; mobile station; multiple radio echo suppresser; reflected waves; Base stations; Directive antennas; Investments; Mobile antennas; Multiaccess communication; Propagation delay; Receiving antennas; Relays; Repeaters; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on

Print_ISBN

0-7803-8523-3

Type

conf

DOI

10.1109/PIMRC.2004.1368734

Filename

1368734