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Battery saving apparatus and method providing optimum synchronization codeword detection

  • US 4,961,073 A
  • Filed: 02/27/1989
  • Issued: 10/02/1990
  • Est. Priority Date: 02/27/1989
  • Status: Expired due to Fees
First Claim
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1. A battery saving method for supplying power to a selective call communication receiver for enabling the detection of a synchronization codeword in data received in a predetermined signaling format having a predetermined message batch length, said method comprising the steps of:

  • (a) supplying power to the receiver for a first portion of a first predetermined time interval, the first predetermined time interval having a time duration equal to at least the message batch length plus one codeword, for enabling the detection of valid data in the predetermined signaling format(b) maintaining the supply of power to the receiver for the remainder of the first predetermined time interval in response to detecting valid data in the first portion of the first predetermined time interval;

    (c) correlating the received data during the first predetermined time interval for the detection of the synchronization codeword;

    (d) re-enabling the detection of valid data within a second portion of the first predetermined time interval, in response to the synchronization codeword not being detected prior to the second portion; and

    (e) maintaining the supply of power to the receiver for a second predetermined time interval, in response to the subsequent detection of valid data in the second portion of the first predetermined time interval.

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