US Patent No. 9,289,422

INITIAL ACQUISITION USING CRYSTAL OSCILLATOR


Patent No. 9,289,422
Issue Date March 22, 2015
Title Initial Acquisition Using Crystal Oscillator
Inventorship David Ben-Eli, Modiin (IL)
Alexander Zaslavsky, Petach Tikva (IL)
Assignee MARVELL WORLD TRADE LTD., St. Michael (BB)

Claim of US Patent No. 9,289,422

1. A method, comprising:
holding in a memory of a receiver, for multiple temperatures, (i) respective first parameters indicative of frequency errors
of a crystal oscillator in the receiver at the respective temperatures, and (ii) respective second parameters that specify
whether the corresponding first parameters were most-recently updated during successful operation of the receiver at the respective
temperatures or only during initial characterization of the crystal oscillator;

measuring an operating temperature of the crystal oscillator;
selecting a center frequency based on one of the first parameters corresponding to the measured operating temperature;
selecting, based on one of the second parameters corresponding to the measured operating temperature, a size of a frequency
uncertainty range around the center frequency, over which to attempt initial acquisition of signals from a transmitter; and

tuning the receiver to acquire the signals from the transmitter over the selected frequency uncertainty range around the center
frequency.