Cooperative Spectrum Sensing for Cognitive Radios

26% highest efficiency for busiest band

13.1% Efficiency in NYC

$20 BILLION for 60 MHz

Primary User

Secondary User 3

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Common Receiver

Energy Detection Matched Filter Detection Cyclostationary Detection Wavelet Detection Performance

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Intro to CSS Performance of CSS Cooperative Diversity CSS Relay Diversity CSS Multiuser Diversity CSS Censored Decision CSS Asynchronous CSS

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Secondary User 3

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Common Receiver

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Primary User

Secondary User 3

Secondary User 2

Secondary User 1

Common Receiver