Apparatus and method for signal detection in a cognitive radio-based wireless communication system
First Claim
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1. A signal detection apparatus in a Cognitive Radio (CR)-based wireless communication system, comprising:
- a cyclic power calculator for calculating a power spectral density of a cyclo-stationary and periodic signal, and calculating optimum statistics using the power spectral density; and
a signal detector for determining whether a signal to be detected is existent or not according to the optimum statistics;
wherein the calculated power spectral density includes a power spectral density of the signal to be detected and a power spectral density of a current received signal, and the optimum statistics are calculated using the power spectral density of the signal to be detected and the current received signal.
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Abstract
An apparatus and method for signal detection in a CR-based wireless communication system are provided. In the signal detection apparatus, a cyclic power calculator calculates the power spectral density of a cyclo-stationary and periodical signal to be detected with respect to a cyclic frequency and calculates optimum statistics using the power spectral density. A signal detector determines whether a signal exists or not according to the optimum statistics.
19 Citations
21 Claims
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1. A signal detection apparatus in a Cognitive Radio (CR)-based wireless communication system, comprising:
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a cyclic power calculator for calculating a power spectral density of a cyclo-stationary and periodic signal, and calculating optimum statistics using the power spectral density; and a signal detector for determining whether a signal to be detected is existent or not according to the optimum statistics; wherein the calculated power spectral density includes a power spectral density of the signal to be detected and a power spectral density of a current received signal, and the optimum statistics are calculated using the power spectral density of the signal to be detected and the current received signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A signal detection apparatus in a Cognitive Radio (CR)-based wireless communication system, comprising:
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a Discrete Fourier Transform (DFT) processor for performing a DFT on an input signal in response to the input signal being discrete, the DFT processor outputting DFT signals; a correlator for calculating a power spectral density of the input signal by correlating DFT signals received from the DFT processor; and a calculator for calculating optimum statistics using the power spectral density; wherein the calculated power spectral density includes a power spectral density of a signal to be detected and a power spectral density of a current received signal, and the optimum statistics are calculated using the power spectral density of the signal to be detected and the current received signal. - View Dependent Claims (8, 9, 10, 11)
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12. A signal detection method in a Cognitive Radio (CR)-based wireless communication system, the method comprising:
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calculating a power spectral density of a cyclo-stationary and periodical signal and calculating optimum statistics using the power spectral density; and determining whether a signal to be detected is existent or not according to the optimum statistics; wherein the calculated power spectral density includes a power spectral density of the signal to be detected and a power spectral density of a current received signal, and the optimum statistics are calculated using the power spectral density of the signal to be detected and the current received signal. - View Dependent Claims (13, 14, 15, 16)
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17. A signal detection method in a Cognitive Radio (CR)-based wireless communication system, comprising:
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performing a Discrete Fourier Transform (DFT) on an input signal in response to the input signal being discrete and outputting DFT signals; calculating a power spectral density of the input signal by correlating the DFT signals; and calculating optimum statistics using the power spectral density; wherein the calculated power spectral density includes a power spectral density of a signal to be detected and a power spectral density of a current received signal, and the optimum statistics are calculated using the power spectral density of the signal to be detected and the current received signal. - View Dependent Claims (18, 19, 20, 21)
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Specification