Cellular data system

Details Cellular data system Cellular data system

1988-09-20

1990-04-03

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

3701101, 455 33, 379 59, H04J 102

Patent

active

049146513

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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patent: 4613990 (1986-09-01), Halpern
patent: 4696027 (1987-09-01), Bonta
patent: 4747101 (1988-05-01), Akaiwa et al.
patent: 4792984 (1988-12-01), Matsuo

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