Telecommunications – Receiver or analog modulated signal frequency converter – With particular receiver circuit
Patent
1987-07-01
1989-01-31
Griffin, Robert L.
Telecommunications
Receiver or analog modulated signal frequency converter
With particular receiver circuit
455228, 34082544, H04B 116, H04Q 914
Patent
active
048022403
ABSTRACT:
A synchronous receiving method for a selective calling signal is disclosed, in which the selective calling signal comprises a first code of predetermined format which enables a receiving unit to easily detect that information is being sent over a channel, a second code of a predetermined format which succeeds the first code and causes the receiving unit to be synchronized with the information transmitted over the channel, and a third code which succeeds the second code and sends information to the receiving unit. In accordance with the present invention, the synchronization is established with the third code in place of the second code included in the transmitted signal to settle the problems of impaired battery saving efficiency, decreased amount of information and increased transmitting time.
REFERENCES:
patent: 4353065 (1982-10-01), Mori
patent: 4384361 (1983-05-01), Masaki
patent: 4523332 (1985-06-01), Mori
patent: 4554540 (1985-11-01), Mori et al.
patent: 4652875 (1987-03-01), Waki
patent: 4663623 (1987-05-01), Lax et al.
patent: 4745408 (1988-05-01), Nagata et al.
Yamaguchi Hiroyuki
Yokoyama Naomi
Burns Robert E.
Griffin Robert L.
Kokusai Denki Kabushiki Kaisha
Kuntz Curtis A.
Lobato Emmanuel J.
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