Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
RADIO SYSTEM
Document Type and Number:
Japanese Patent JP2001144678
Kind Code:
A
Abstract:

To provide a radio system with very high convenience where interruption of a voice signal caused when terminal stations make a speech is eliminated and all terminal stations can immediately be transited to a broadcasting state by decreasing a time when each terminal station receives an acquisition signal (a signal to inform each terminal station about broadcasting of a control station from now) from the control station.

Each terminal station is provided with an antenna multicoupler consisting of one antenna for simultaneous transmission and reception and with a changeover means that brings a reception section from a speech channel into a broadcasting channel in a transmission state, and each terminal station can receive the acquisition signal from the control station even when the one terminal station makes a speech with other terminal station in the transmission state.


Inventors:
SUZUKI OSAMU
Application Number:
JP32482699A
Publication Date:
May 25, 2001
Filing Date:
November 16, 1999
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
HITACHI INT ELECTRIC INC
International Classes:
H04B7/24; H04B7/26; H04H20/00; H04H20/59; (IPC1-7): H04B7/26; H04H1/00