Sequential Sensing Scheme for Cognitive Radio Based on a Block of Received Samples
AssigneeNEC Laboratories America, Inc.
InventorsYan Xin, Honghai Zhang, Sampath Rangarajan, Kyungtae Kim
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Abstract
A method and system for determining whether a given electromagnetic frequency is in use includes applying a transformation to an amplitude of received samples, adjusting the transformed samples by a constant based on a minimum detection signal-to-noise ratio; combining the adjusted samples to produce a test statistic; and using a processor to make a determination regarding if the frequency is in use based on the test statistic exceeded or falling below a threshold, said test statistic being based on Ξq=Σi=1q×L(|ri|2−Δ), where q is the block index, ri is the ith received sample, and Δ is the constant.
Claims3
A method for determining whether a given electromagnetic frequency is in use, comprising the steps of:
- applying a transformation to an amplitude of received samples;
- adjusting the transformed samples by a constant based on a minimum detection signal-to-noise ratio;
- combining the adjusted samples to produce a test statistic;
- and
- using a processor to make a determination regarding if the frequency is in use based on the test statistic exceeded or falling below a threshold, said test statistic being based on Ξq=Σi=1q×L(|ri|2−Δ), where q is the block index, ri is the ith received sample, and Δ is the constant.
A system for determining whether a given electromagnetic frequency is in use, comprising:
- a transformation module configured to transform an amplitude of received samples;
- an adjustment module configured to adjust the transformed samples by a constant based on a minimum detection signal-to-noise ratio and to combine the adjusted samples to produce a test statistic;
- and
- a test module configured for making a determination using a processor as to whether the frequency is in use based on the test statistic exceeding or falling below a threshold, said test statistic being based on Ξq=Σi=1q×L(|ri|2−Δ), where q is the block index, ri is the ith received sample, and Δ is the constant.
Dependencies are inferred from the claim text.