Wireless paging receiver

Details Wireless paging receiver Wireless paging receiver

1976-09-14

1978-08-29

Caldwell, Sr., John W.

Communications: electrical

Systems

Nonselective paging

325 55, 325 64, 325364, 340147PC, 340167R, H04B 700

Patent

active

041107438

ABSTRACT:
A wireless paging receiver to be called up individually or as member of a group of receivers by a binary modulated carrier frequency call telegram. Each call telegram contains an address. Each individual address is composed by code words selected from a certain number of patterns. In a group call address one or more code words are replaced by a group call pattern, so that all receivers are called whose addresses contain the remaining code word patterns. For coding the address in the receiver only one connection must be positioned for each address code word. Messages can be transmitted with the call telegram and different call signals of different lengths generated. A parity check of the received call telegram is performed with little additional material.

REFERENCES:
patent: 3469243 (1969-09-01), Willcox et al.
patent: 3684965 (1972-08-01), Gautney et al.
patent: 3768090 (1973-10-01), Williams
patent: 3806922 (1974-04-01), Isbister
patent: 3835387 (1974-09-01), Rooks et al.
patent: 3836888 (1974-09-01), Boenke et al.
patent: 3846783 (1974-11-01), Apsell et al.
patent: 3851251 (1974-11-01), Wigner et al.
patent: 3859475 (1975-01-01), Wulfsberg et al.

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