4.Multiplexing

4.Multiplexing - Multiplexing Multiplexing Sharing by...

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Unformatted text preview: Multiplexing Multiplexing Sharing by Multiple Sources or Users Example: Stereo FM Principle of Orthogonality Minimize I nterference Quadrature phase Polarization Frequency spectrum (FDM) Pulse timing (TDM) User code (CDMA) Schemes Fixed Dynamic or on demand FDM I ndividual Carrier Filters: bandpass, tunable Multiplexer Demultiplexer Multi Carrier OFDM Wireless: multipath delay, interference, fading OFDM bwrc.eecs.berkeley.edu/ Classes/EE225C/Lectures/Lec16_ ofdm.pdf FFT OFDM Mobile Environment Multi-path Time domain echo and delay Frequency dependent loss and phase OFDM Multi carriers at low data rate Delay << symbol time Efficient use of bandwidth Efficient use of resources FFT versus local oscillators and mixers Orthogonality Frequencies: N / Symbol period OFDM Block Diagram Transmitter Serial to parallel conversion Signal mapping I FFT Guard or...
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This note was uploaded on 02/24/2011 for the course EE 513 taught by Professor Dr.paololiu during the Spring '11 term at SUNY Buffalo.

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4.Multiplexing - Multiplexing Multiplexing Sharing by...

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