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Frequency division multiplexed acknowledge back paging system

  • US 4,875,038 A
  • Filed: 01/07/1988
  • Issued: 10/17/1989
  • Est. Priority Date: 01/07/1988
  • Status: Expired due to Term
First Claim
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1. An acknowledge back pager having a unique address associated therewith, said pager comprising;

  • receiving means for receiving paging signals from a central station, said paging signals including a batch of M pager addresses transmitted in a sequential order during a first time frame, wherein M is the number of pager addresses in said batch;

    decoding means, coupled to said receiving means, for detecting the presence of said pager'"'"'s address within said batch of M addressesaddress order determining means, coupled to said decoding means, for determining the order of said pager,s address within said batch of M addressessub-band transmitting means for transmitting an acknowledge back signal on a selected one of a plurality of M predetermined frequency sub-bands, said selected one of said sub-bands exhibiting a predetermined relationship to the order of the address of said pager within said batch of M addresses.

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