System and method for compensating for modulation induced frequency shift during transmission of a radio frequency signal
First Claim
1. A method for compensating for frequency shifts during transmission of an RF control signal, the method comprising:
- receiving a request to enter a transmission mode from a user;
generating a carrier signal having a frequency;
measuring the frequency of the generated carrier signal;
comparing the measured frequency of the generated carrier signal to a desired frequency;
calculating and applying a correction to the carrier signal frequency when there is a difference between the measured frequency and the desired frequency and in response to a condition of data not being modulated on the generated carrier signal; and
discontinuing the application of the correction to the carrier signal frequency in response to data being modulated on the generated carrier signal.
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Accused Products
Abstract
A method for compensating for frequency shifts during transmission of an RF control signal includes receiving a request to enter a transmission mode from a user. A carrier signal having a frequency is generated and the frequency of the carrier signal is measured. The measured frequency of the carrier signal is compared to a desired frequency to determine if there is a difference between the measured frequency and the desired frequency. If there is a difference, it is determined if data is being modulated on the carrier signal. If data is not being modulated on the carrier signal, a correction is applied to the carrier signal frequency.
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Citations
19 Claims
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1. A method for compensating for frequency shifts during transmission of an RF control signal, the method comprising:
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receiving a request to enter a transmission mode from a user; generating a carrier signal having a frequency; measuring the frequency of the generated carrier signal; comparing the measured frequency of the generated carrier signal to a desired frequency; calculating and applying a correction to the carrier signal frequency when there is a difference between the measured frequency and the desired frequency and in response to a condition of data not being modulated on the generated carrier signal; and discontinuing the application of the correction to the carrier signal frequency in response to data being modulated on the generated carrier signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An electronic control system for compensating for frequency shifting during transmission of a radio frequency control signal with a remote electronic device, the control system comprising:
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a transmitter for communicating with the remote electronic device; a voltage controlled oscillator circuit coupled to the transmitter, the voltage controlled oscillator circuit being configured to generate a control signal, the control signal having a carrier frequency; and a control circuit coupled to the voltage controlled oscillator circuit, the control circuit being configured to measure the carrier frequency of the control signal generated by the voltage controlled oscillator circuit, wherein the carrier frequency of the control signal is compared to a desired frequency of the remote electronic device and when a difference exists between the value of the carrier frequency and the desired frequency and in response to a condition of data not being modulated onto the control signal, the control circuit is configured to calculate and apply a correction to the carrier frequency of the control signal, and wherein the control circuit is configured to discontinue the application of the correction to the carrier frequency of the control signal in response to data being modulated on the carrier signal. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification