DETECTION OF THE PRESENCE OF TELEVISION SIGNLAS EMBEDDED IN NOISE USING CYCLOSTATIONARY TOOLBOX
First Claim
1. A method for detecting a television signal, comprising:
- receiving, over a frequency spectrum allocated to a licensed user, a signal that comprises the television signal and noise, the television signal exhibiting cyclostationary properties;
determining a peak energy of the signal byupsampling the signal by a factor of N;
performing delay-multiplier of the signal;
performing a tone analysis of the signal; and
detecting a single signal in an output of the tone analysis; and
determining a periodicity of the television signal based on the determined peak energy.
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Accused Products
Abstract
Detecting the presence of a television signal embedded in a received signal including the television signal and noise. Either first-order or second order cyclostationary property of the signals may be used for their detection. When the first-order cyclostationary property is used, the received signal is upsampled by a factor of N, a synchronous averaging of a set of M segments of the upsampled received signal is performed, an autocorrelation of the signal is performed; and the presence of peaks in the output of the autocorrelation function is detected. When the second order cyclostationary property of the signal is used, the received signal is delayed by a fixed delay (symbol time), the received signal is multiplied with the delayed version, and a tone (single frequency) in the output is detected.
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Citations
6 Claims
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1. A method for detecting a television signal, comprising:
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receiving, over a frequency spectrum allocated to a licensed user, a signal that comprises the television signal and noise, the television signal exhibiting cyclostationary properties; determining a peak energy of the signal by upsampling the signal by a factor of N; performing delay-multiplier of the signal; performing a tone analysis of the signal; and detecting a single signal in an output of the tone analysis; and determining a periodicity of the television signal based on the determined peak energy. - View Dependent Claims (2)
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3. A device for detecting a television signal, the device comprising:
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a processor in communication with a memory, the processor configured to; receive, over a frequency spectrum allocated to a licensed user, a signal that comprises the television signal and noise, the television signal exhibiting cyclostationary properties; determine a peak energy of the received signal by upsampling the signal by a factor of N; performing delay-multiplier of the signal; performing a tone analysis of the signal; and detecting a single signal in an output of the tone analysis; and determine a periodicity of the television signal based on the determined peak energy. - View Dependent Claims (4)
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5. A non-transitory computer readable medium providing instructions to a processing system for detecting a television signal, the instructions causing the processing system to:
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receive, over a frequency spectrum allocated to a licensed user, a signal that comprises the television signal and noise, the television signal exhibiting cyclostationary properties; determine a peak energy of the received signal by upsampling the signal by a factor of N; performing delay-multiplier of the signal; performing a tone analysis of the signal; and detecting a single signal in an output of the tone analysis; and determine a periodicity of the television signal based on the determined peak energy. - View Dependent Claims (6)
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Specification