Wide-band channel for emergency communication

A single wideband channel could be assigned to all short range emergency communication systems, resulting in better service and better spectrum utilization. Many independent VHF or UHF mobile users or military nets could use this one channel at random without any form of centralized control or synch...

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Bibliographic Details
Published in:IRE transactions on vehicular communications 1961-08, Vol.VC-10 (2), p.40-44
Main Author: Magnuski, H.
Format: Article
Language:English
Subjects:
Centralized control
Delay
Delta modulation
Frequency conversion
Frequency synchronization
Interference
Mobile communication
Modulation coding
Transmitters
Wideband
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Summary:A single wideband channel could be assigned to all short range emergency communication systems, resulting in better service and better spectrum utilization. Many independent VHF or UHF mobile users or military nets could use this one channel at random without any form of centralized control or synchronization, and each could transmit different simultaneous emergency messages without significant mutual interference. In reviewing wideband modulation and addressing (coding) techniques, it is shown that Delta modulation and discrete frequency coding is best suitable for this application.
ISSN:0097-6628
DOI:10.1109/IRETVC1.1961.207468