INITIAL ACQUISITION USING CRYSTAL OSCILLATOR
First Claim
1. A method, comprising:
- holding in a memory of a receiver, for each temperature in a range of temperatures, a respective first parameter indicative of a frequency error of a crystal oscillator in the receiver at the temperature, and a respective second parameter indicative of an uncertainty of the first parameter;
measuring an operating temperature of the crystal oscillator;
selecting, based on the first and second parameters corresponding to the measured operating temperature, one or more frequencies for initial acquisition of signals from a transmitter; and
tuning the receiver to receive the signals from the transmitter on at least one of the selected frequencies.
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Accused Products
Abstract
A method includes holding in a memory of a receiver, for each temperature in a range of temperatures, a respective first parameter indicative of a frequency error of a crystal oscillator in the receiver at the temperature, and a respective second parameter indicative of an uncertainty of the first parameter. An operating temperature of the crystal oscillator is measured. One or more frequencies, for initial acquisition of signals from a transmitter, are selected based on the first and second parameters corresponding to the measured operating temperature. The receiver is tuned to receive the signals from the transmitter on at least one of the selected frequencies.
11 Citations
24 Claims
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1. A method, comprising:
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holding in a memory of a receiver, for each temperature in a range of temperatures, a respective first parameter indicative of a frequency error of a crystal oscillator in the receiver at the temperature, and a respective second parameter indicative of an uncertainty of the first parameter; measuring an operating temperature of the crystal oscillator; selecting, based on the first and second parameters corresponding to the measured operating temperature, one or more frequencies for initial acquisition of signals from a transmitter; and tuning the receiver to receive the signals from the transmitter on at least one of the selected frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. Apparatus, comprising:
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a receiver, which is configured to receive signals; a memory, which is configured to hold for each temperature in a range of temperatures a respective first parameter indicative of a frequency error of a crystal oscillator in the receiver at the temperature, and a respective second parameter indicative of an uncertainty of the first parameter; and control circuitry, which is configured to obtain a measured operating temperature of the crystal oscillator, to select, based on the first and second parameters corresponding to the measured operating temperature, one or more frequencies for initial acquisition of the signals from a transmitter, and to tune the receiver to receive the signals from the transmitter on at least one of the selected frequencies. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification