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ece4305_L19 - Electromagnetic Spectrum Revisited ECE4305...

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Electromagnetic Spectrum Revisited ECE4305: Software-Defined Radio Systems and Analysis Professor Alexander M. Wyglinski Department of Electrical and Computer Engineering Worcester Polytechnic Institute Lecture 19 Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis
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Electromagnetic Spectrum Revisited Spectrum Measurement and Characterization Spectrum Access Implementing Spectrum Sensing Recall U.S. Spectrum Allocation Chart Figure: Frequency Allocation Charts for the U.S. (Courtesy of U.S. Dept. of Commerce, National Telecommunications and Information Administration, Office of Spectrum Management - Oct. 2003). Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis
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Electromagnetic Spectrum Revisited Spectrum Measurement and Characterization Spectrum Access Implementing Spectrum Sensing Need for Spectrum Regulations I Many different wireless devices allocated same range of frequency spectrum I Lack of centralized coordination between wireless devices employed in different applications I Need to accommodate growing demand for wireless spectrum I Without regulations, different wireless devices may unintentional interfere with each other I Spectrum regulations dictate the following I Allowable transmit power levels I Frequency masks I Detection threshold for determining unoccupied spectrum Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis
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Electromagnetic Spectrum Revisited Spectrum Measurement and Characterization Spectrum Access Implementing Spectrum Sensing Electrospace Concept Figure: Schematic of the Electrospace Concept.
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