Digital radio paging communication system

Details Digital radio paging communication system Digital radio paging communication system

1978-09-14

1980-03-18

Bookbinder, Marc E.

Telecommunications

Transmitter and receiver at separate stations

340311, 455343, H04B 504

Patent

active

041941535

ABSTRACT:
A digital paging communication system including a transmitter and a plurality of receivers is disclosed. The transmitter generates a preamble digital signal, a calling digital signal and an end mark digital signal in a predetermined sequence. Each receiver demodulates a received signal into the preamble digital signal, calling digital signal and end mark digital signal. These signals are separately detected in synchronism with a recovered clock signal. Power is supplied to the radio frequency, intermediate frequency and demodulator sections of the receiver intermittently until such time as the calling signal of the receiver is detected, after which power is supplied continuously until an end mark signal is detected. The intermittent operation is a battery saving feature.

REFERENCES:
patent: 3769593 (1973-10-01), Williams
"New Radio Paging System," M. Komura et al., Japan Telecomm. Review, Jul. 1977, pp. 217-225.

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