Digital radio paging receiver

Details Digital radio paging receiver Digital radio paging receiver

H - Electricity

04

B

325/72

H04B 1/16 (2006.01) H04Q 7/16 (2006.01)

Patent

CA 1209643

ABSTRACT A digital radio paging receiver capable of detecting multi-address codewords with a reduced PROM capacity and a reduced number of shift registers is described. The receiver is also made more compact by reducing the number of socket leads for the cord plug. The receiver includes a first memory circuit for storing a first address codeword assigned to the receiver and comprised of a BCH code. The receiver also includes a second memory circuit for storing several codewords, each comprising a BCH code whose information contents differ from the first address codeword only in a small number of specific bits. Also included is a code generator for performing an exclusive OR operation in a time series between the contents of the second memory circuit and the first memory circuit, respectively, and providing as its output second address codewords corresponding to the first address codeword and circuitry for time serially comparing a selective calling signal with the first and second address codewords to provide responsive to the results of comparison an identify signal representing the identity of said calling signal with the address codewords.

420268

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