Tutorial 3(2) - MODERN COMMUNICATION SYSTEM ELEG 4503...

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MODERN COMMUNICATION SYSTEM ELEG 4503 Tutorial 3 Sep 22, 2016
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Digital Transmission ‘Baseband’ means that no carrier wave modulation is used for transmission Information: - analog:BW & dynamic range - digital:bit rate Maximization of information transferred Transmitted power; bandpass/baseband signal BW Message protection & channel adaptation; convolution, block coding M-PSK/FSK/ASK..., depends on channel BW & characteristics wireline/wireless constant/variable linear/nonlinear Noise Interference Channel Modulator Channel Encoder Source encoder Channel decoder Source decoder Demodulator Information sink Information source Message Message estimate Received signal (may contain errors) Transmitted signal Interleaving Fights against burst errors Deinterleaving In baseband systems these blocks are missing
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