Title:
IN-BAND VEHICULAR REPEATER FOR TRUNKED RADIO SYSTEM
Document Type and Number:
WIPO Patent Application WO1998007286
Kind Code:
A3
Abstract:
A vehicular repeater system communicates with a portable mobile radio using the same RF communication band and digital trunking protocol that it communicates with a base site. The repeater station may employ an operational radio within a vehicle which communicates with the base site. A separate repeater radio module is connected to the operational radio, preferably through hardwired links. The separate repeater radio module includes a transmitting section which receives messages from the base site through the operational radio, and forwards these messages through a passive RF interface to a portable radio. The separate repeater also includes a receiving section which receives messages from the portable radio, and forwards these messages through the operational radio to the base site. Additionally, the receiver section may include a padded receiving section with low power amplification and additional receiver attenuation for monitoring other nearby vehicular repeater systems for potential interference prior to allowing its own vehicular repeater to become active.
Inventors:
MANGUM PETER M
BUTLER CLYDE R JR
DREON STEVEN T
LA FRATTA LAURENCE A
PRIEST MARK D
PITCHER GARY J
BUTLER CLYDE R JR
DREON STEVEN T
LA FRATTA LAURENCE A
PRIEST MARK D
PITCHER GARY J
Application Number:
PCT/US1997/013376
Publication Date:
May 07, 1998
Filing Date:
August 01, 1997
Export Citation:
Assignee:
ERICSSON GE MOBILE INC (US)
International Classes:
H04W84/08; (IPC1-7): H04Q7/28; H04Q7/32
Foreign References:
| US4905302A | 1990-02-27 | |||
| US4659878A | 1987-04-21 | |||
| GB2298998A | 1996-09-18 | |||
| US5109526A | 1992-04-28 | |||
| DE3528886A1 | 1987-02-19 |
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