Cellular data system
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United States of America Patent
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Apr 3, 1990
Grant Date -
N/A
app pub date -
Sep 20, 1988
filing date -
Sep 20, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An improved AMPS cellular system where non-interfering digital communication channels are added to the existing analog or digital voice communications channels in the system by utilizing frequency space between channels made possible by the AMPS co-channel and adjacent channel frequency coordination procedures. Interference is prevented by reduction of power, selection of frequencies, proper modulation and demodulation techniques, and unique allocation to the channels in frequency and location. The system is also applicable in general to the insertion of narrow frequency bandwidth channels in any existing communications system using co-channel and adjacent channel frequency allocation strategies.
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