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• At receiver, the signal can be approximately reconstructed as  
 
• At receiver, the signal can be approximately reconstructed as  
  
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+
 
  
 
• Two types of distortions: slope-overload distortion and granular noise  
 
• Two types of distortions: slope-overload distortion and granular noise  

Revision as of 22:23, 2 December 2017

• Delta modulation

Another practical analog-to-digital conversion technique is delta modulation, whose output is a binary bit sequence, each consisting of either 0 or 1.

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• Delta modulator at transmitter

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• At receiver, the signal can be approximately reconstructed as


• Two types of distortions: slope-overload distortion and granular noise

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• To avoid slope-overload distortion, we need to have

92223.png


• On the other hand, to reduce granular noise, it is desirable to have smaller ∆

• Thus, there is a trade-off in selecting large or small step size ∆ to balance between minimizing slope-overload distortion and granular noise

• One solution is to reduce 𝑇𝑇𝑠𝑠, but this increases transmission rate

Alumni Liaison

Correspondence Chess Grandmaster and Purdue Alumni

Prof. Dan Fleetwood