SPECTRUM-SENSING ALGORITHMS AND METHODS
First Claim
1. A spectrum-sensing method, comprising:
- receiving an input spectrum having a plurality of channels;
performing a coarse scan of the plurality of channels of the input spectrum to determine one or more occupied candidate channels and vacant candidate channels, wherein the coarse scan is associated with a first resolution bandwidth and a first frequency sweep increment;
performing a fine scan of the occupied candidate channels and the vacant candidate channels to determine actually occupied channels and actually vacant channels, wherein the fine scan is associated with a second resolution bandwidth and a second frequency sweep increment; and
storing an indication of the actually occupied channels and the actually vacant channels.
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Abstract
Spectrum-sensing algorithms and methods may be provided for use in cognitive radios and other applications. The spectrum-sensing algorithms and methods may include receiving an input spectrum having a plurality of channels, performing a coarse scan of the plurality of channels of the input spectrum to determine one or more occupied candidate channels and vacant candidate channels, where the coarse scan is associated with a first resolution bandwidth and a first frequency sweep increment, performing a fine scan of the occupied candidate channels and the vacant candidate channels to determine actually occupied channels and actually vacant channels, where the fine scan is associated with a second resolution bandwidth and a second frequency sweep increment, and storing an indication of the actually occupied channels and the actually vacant channels.
82 Citations
21 Claims
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1. A spectrum-sensing method, comprising:
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receiving an input spectrum having a plurality of channels; performing a coarse scan of the plurality of channels of the input spectrum to determine one or more occupied candidate channels and vacant candidate channels, wherein the coarse scan is associated with a first resolution bandwidth and a first frequency sweep increment; performing a fine scan of the occupied candidate channels and the vacant candidate channels to determine actually occupied channels and actually vacant channels, wherein the fine scan is associated with a second resolution bandwidth and a second frequency sweep increment; and storing an indication of the actually occupied channels and the actually vacant channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A spectrum-sensing method, comprising:
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providing an input radio frequency (RF) spectrum having a plurality of channels; analyzing the plurality of channels of the input RF spectrum using a coarse-scanning stage to determine one or more strong candidate channels, weak candidate channels, and vacant candidate channels, wherein the coarse-scanning stage is associated with a first resolution bandwidth and a first frequency sweep increment; analyzing the one or more strong candidate channels, weak candidate channels, and vacant candidate channels using a fine-scanning stage to determine actually occupied channels and actually vacant channels, wherein the fine-scanning stage is associated with a second resolution bandwidth and a second frequency sweep increment; and storing an indication of the actually occupied channels and the actually vacant channels. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. A spectrum-sensing system, comprising:
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an input radio frequency (RF) spectrum having a plurality of channels; first means for determining one or more strong candidate channels, weak candidate channels, and vacant candidate channels from the input RF spectrum, wherein the first means is associated with a first resolution bandwidth and a first frequency sweep increment; and second means for determining actually occupied channels and actually vacant channels based upon the one or more strong candidate channels, weak candidate channels, and vacant candidate channels, wherein the second means is associated with a second resolution bandwidth and a second frequency sweep increment.
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Specification