ece4305_L16

ece4305_L16 - Multicarrier Framework ECE4305:...

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Unformatted text preview: Multicarrier Framework ECE4305: Software-Defined Radio Systems and Analysis Professor Alexander M. Wyglinski Department of Electrical and Computer Engineering Worcester Polytechnic Institute Lecture 17 Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis Multicarrier Framework Introduction Single Carrier Transmission Multicarrier Transmission Extending Single Carrier to Multicarrier I Multicarrier modulation can be viewed as the simultaneous transmission of several low data rate single carrier signals summed together I These signals, referred to as subcarriers are kept separate in the frequency domain I In this lecture, we begin with the development of an orthogonal quadrature amplitude modulation (OQAM) multicarrier framework I Multiple QAM signals modulated to different carrier frequencies and summed toegther I We then extend this result in the subsequent lecture to show it can be implemented using a discrete Fourier transform (DFT) and its inverse (IDFT) I This is referred to as orthogonal frequency division multiplexing (OFDM) Professor Alexander M. Wyglinski ECE4305: Software-Defined Radio Systems and Analysis Multicarrier Framework Introduction Single Carrier Transmission Multicarrier Transmission Rectangular M-ary QAM Revisited I D bits are taken from the input bit stream d [ m ] I Used to select one of 2...
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This note was uploaded on 01/13/2011 for the course ECE 4305 taught by Professor Wy during the Spring '10 term at WPI.

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ece4305_L16 - Multicarrier Framework ECE4305:...

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