Method and apparatus for synchronizing to a synchronous selective call signal
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United States of America Patent
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Sep 10, 1996
Issued Date -
N/A
app pub date -
Feb 3, 1994
filing date -
Dec 2, 1991
priority date (Note) -
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Abstract
A selective call receiver (111) receives a synchronous selective call signal (99) having synchronization portions (102 and 104) and a frame identification portion (106). Upon finding the signal the selective call receiver's bit and frame synchronizers (126 and 128) synchronize to a frame (100) of the signal and a frame ID decoder (130) decodes the frame ID (106). A comparator (136) compares the received frame ID (106) with an ID (142) assigned to the receiver, and optionally a first and second mask (134A and 134B) to determine the number of frames until an occurrence of a desired frame and conserves power until the occurrence of the desired frame (188).
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