H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/35
H04B 7/00 (2006.01) H04B 7/12 (2006.01) H04B 7/24 (2006.01) H04K 3/00 (2006.01)
Patent
CA 1300234
ABSTRACT OF THE DISCLOSURE Selective addresses and/or emergency messages are transmitted between individual stations by using a calling signal consisting of a synchronization signal and an address signal (SS and AS) sent out by a transmitter. The address signal (AS) used is a FSK signal which forms a diversity pair by being subdivided into two identical m-ary FSK signals. The type of operation used is a Channel in Band Scanning. The apparatus contains an address signal receiver which is realized by Real Time-Digital-Signal processing. As a result, the desired participating stations and only these can be reliably and unequivocally activated. In addition, the process is extremely insensitive to interferences.
578495
Kung Roland
Widmer Hanspeter
Kirby Eades Gale Baker
Zellweger Telecommunications Ag
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