Radio paging system and receiver therefor

Details Radio paging system and receiver therefor Radio paging system and receiver therefor

H - Electricity

04

B

325/93

H04B 1/16 (2006.01) G08B 3/10 (2006.01) H04Q 7/10 (2006.01) H04Q 7/18 (2006.01)

Patent

CA 1231390

ABSTRACT According to the present invention, there is provided a radio paging system having a paging receiver, the receiver comprising: means for receiving a first carrier wave modulated with a first plurality of preamble codes and one of first address and control codes and a second carrier wave modulated with a second plurality of preamble codes, the first plurality of preamble codes and a second address code, the first plurality of preamble codes being shorter than the second plurality of preamble codes; means for demodulating the first and second carrier waves; means for processing the output of the demodulating means into first and second plurality of preamble codes, first and second address codes and control code; means for generating first and second control signals having first and second repetition periodes, respectively, the first repetition period being shorter than the first plurality of preamble codes and shorter than the second repetition period, the second repetition period being shorter than the second plurality of preamble codes; means for supplying power to a prescribed part of the receiver in response to one of the first and second control signals; and means for supplying the second control signal from the generating means to the power supply means in response to the control code and supplying the first control signal from the generating means to the power supply means in response to the second plurality of preamble codes.

451546

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