Lecture 7

Lecture 7 - Baseband Pulse and Digital Signaling Digital...

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Baseband Pulse and Digital Signaling
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Digital signaling
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Binary Signaling
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Multilevel Signaling
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Definitions Baud Rate  D = N/T o    (# Symbols per unit of time) Bit Rate  R = lN/T o    (# Bits per unit of time, assuming l  bits per symbol)
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Peak Value of the error (+-) one half of the quantizer step. B f S 2 S nf R = (Bit Rate) n M 2 = S PCM nf l D B 2 1 2 1 = B l n B PCM ) / ( S PCM f l n D B ) / ( = = (first null BW) The minimum bandwidth corresponds to Sinc pulses
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Advantage Disadvantage AKA: Unipolar. Single power supply. Easy to generate (TTL) DC coupled Power wasted in DC AKA: Polar DC not required Good Pe. Easy to generate Dual voltage power supply Large PSD near DC Easy clock generation Double Bandwidth Double Power for same Pe than polar AKA: Bipolar Built in error correction Clock easy to obtain Receiver needs to handle three levels. String of 0s loses
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This note was uploaded on 12/29/2011 for the course ENG 3514 taught by Professor Arellano during the Fall '11 term at FIU.

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Lecture 7 - Baseband Pulse and Digital Signaling Digital...

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