Telecommunications – Interference signal transmission
Patent
1980-06-04
1983-03-29
Bookbinder, Marc E.
Telecommunications
Interference signal transmission
455 3, 455 54, 455 57, 455 63, H04B 360, H04B 1500
Patent
active
043786022
ABSTRACT:
In a communication system including communication transmitting means for modulating a carrier wave having a fixed frequency by a communication signal having communication content and for radiating the modulated signal wave, and receiving means for receiving the modulated signal radiated from the communication transmitting means to demodulate the communication signal, the communication system comprises a communication shielding area provided at a desired location on a boundary between communication areas for limiting the extent of the communication areas in which the modulated signal is transmitted, and shielding transmitting means for transmitting the shielding signal wave into said communication shielding area, the shielding signal wave being received by the receiving means tuned to the carrier wave frequency at a signal receiving level equal to or more than the receiving level of the modulated signal. This system can reliably and simply limit each of the communication areas without interference between the areas and is suitable for a private or fee-charging communication system.
REFERENCES:
patent: 2567431 (1951-09-01), Halstead
patent: 3996518 (1976-12-01), Halstead et al.
Takeuchi Takeshi
Umetsu Yutaka
Bookbinder Marc E.
Hochiki Corporation
LandOfFree
Communication system with a limited communication area does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Communication system with a limited communication area, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Communication system with a limited communication area will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1206104