METHODS AND SYSTEMS FOR DETERMINING A RECEIVED SIGNAL FREQUENCY
First Claim
1. A system for determining a received signal frequency by sampling the received signal at a rate less than twice a predefined nyquist rate, the system comprising:
- a distorting component configured to distort the received signal in a frequency dependent manner to generate a distorted signal;
at least one analog to digital converter (ADC) configured to sample the received signal and the distorted signal at a rate less than twice a predefined nyquist rate to generate a sampled received signal and a sampled distorted signal; and
a processing component configured to determine a frequency of the received signal based on the sampled received signal and the sampled distorted signal,wherein the distorting component is configured to distort at least one of an amplitude or a group delay of the amplified received signal.
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Abstract
A system and method for determining a received signal frequency by sampling the received signal at a rate less than twice a predefined nyquist rate. The system includes a distorting component configured to distort the received signal in a frequency dependent manner, at least one analog to digital converter configured to sample the received signal and the distorted signal at a rate less than twice a predefined nyquist rate, and a processing component configured to determine a frequency of the received signal based on the sampled received signal and the sampled distorted signal. The method includes distorting the received signal, sampling the received signal and the distorted signal at a rate less than twice a predefined nyquist rate, and determining a frequency of the received signal. In an embodiment, distorting includes at least one of distorting an amplitude or a group delay of the received signal.
19 Citations
20 Claims
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1. A system for determining a received signal frequency by sampling the received signal at a rate less than twice a predefined nyquist rate, the system comprising:
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a distorting component configured to distort the received signal in a frequency dependent manner to generate a distorted signal; at least one analog to digital converter (ADC) configured to sample the received signal and the distorted signal at a rate less than twice a predefined nyquist rate to generate a sampled received signal and a sampled distorted signal; and a processing component configured to determine a frequency of the received signal based on the sampled received signal and the sampled distorted signal, wherein the distorting component is configured to distort at least one of an amplitude or a group delay of the amplified received signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A distance measuring equipment (DME) system for determining a received DME signal frequency by sampling the received signal at a rate less than twice a predefined nyquist rate, the DME system comprising:
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a distorting component configured to distort the received signal in a frequency dependent manner to generate a distorted signal; at least one analog to digital converter (ADC) configured to sample the received signal and the distorted signal at a rate less than twice a predefined nyquist rate to generate a sampled received signal and a sampled distorted signal; and a processing component configured to determine a frequency of the received DME signal based on the sampled received signal and the sampled distorted signal, wherein the distorting component is configured to distort at least one of an amplitude or a group delay of the amplified received signal.
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11. A method for determining a received signal frequency by sampling the received signal at a rate less than twice a predefined nyquist rate, the method comprising:
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distorting the received signal in a frequency dependent manner to generate a distorted signal; sampling the received signal and the distorted signal at a rate less than twice a predefined nyquist rate using at least one sampling means to generate a sampled received signal and a sampled distorted signal; and determining a frequency of the received signal based on the sampled received signal and the sampled distorted signal, wherein distorting includes distorting at least one of an amplitude or a group delay of the received signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification