Title:
コードレス電話の空きチャンネル選出システム
Document Type and Number:
Japanese Patent JP3839473
Kind Code:
B2
Abstract:
A radio frequency (RF) signal transmitter/receiver system comprises a pair of transmitter/receiver units. A microcomputer-based RF carrier detect system determines when an RF signal is present or absent. The RF carrier detect system is also responsive to noise interference signals at or near its currently-tuned receiving channel. In periods of inactivity, the RF signal receiver monitors its currently-tuned channel and upon detection of noise interference or upon a determination that the currently-tuned channel is occupied, initiates a fast scan operation to identify an unoccupied and relatively interference-free channel, and transmits a command to its paired transmitter/receiver unit causing it to tune to the newly-identified unoccupied channel.
Inventors:
Dennis Ronald, Matsuka See
Huosaseca, Jiyoung Mark
Capadeia, Manetsk Berrum
Huosaseca, Jiyoung Mark
Capadeia, Manetsk Berrum
Application Number:
JP51856695A
Publication Date:
November 01, 2006
Filing Date:
January 03, 1995
Export Citation:
Assignee:
THOMSON CONSUMER ELECTRONICS,INCORPORATED
International Classes:
H04B1/40; H04M1/72511; H04W84/08; H04M1/00; H04M19/00; H04M19/08; H04W72/08; H04W84/10
Domestic Patent References:
| JP3108916A | ||||
| JP5055994A | ||||
| JP61041239A |
Foreign References:
| US5044010 | ||||
| US5197093 |
Attorney, Agent or Firm:
Katsunori Watanabe