Delta Modulation
PRESENTATION
ON
GROUP MEMBERGROUP MEMBER SAJIBUL HASSAN NAHIAN AHMED TARIQUL ISLAM MONSUR AHMED SHAFIQ OMAR FARUQ
05/01/23 2
SAJIBUL HASSAN ID-151-15-4986
05/01/23 3
What is What is Delta Delta Modulation?Modulation?
• A delta modulation is an analog-to-digital and digital-to-analog signal conversion technique used Transfer Data.
05/01/23 4
Why Delta Why Delta Modulation?Modulation?
• (DM or Δ-modulation) is an analog-to-digital conversion.
• DM is the simplest form of differential pulse-code modulation.(PCM)
• Delta Modulation used by Satellite Business Systems or SBS.
05/01/23 5
Why Delta Why Delta Modulation?Modulation?
• To achieve high signal-to-noise ratio, delta modulation.
• DM can change instantly butvoice signals can’t not change instantly.
• DM signal is smaller than the PCM system.
05/01/23 6
NAHIAN AHMED ID- 151-15-5137
05/01/23 7
Concept of DMConcept of DM
05/01/23 8
DM Block DiagramDM Block Diagram
• If signal is large, the next bit in the digital data is 1, otherwise, it is O.
05/01/23 9
TARIQUL ISLAM ID -151-15-5144
05/01/23 10
DemodulationDemodulation• Demodulation is digital-to-analog signal
conversion.
• It’s the reverse System of modulation.
• Demodulation was first used in radio receivers.
05/01/23 11
De M Block DiagramDe M Block Diagram
05/01/23 12
OMAR FARUQID-151-15-5444
13
Simple Simple Implementation of a Implementation of a
DM systemDM system
05/01/23 14
How it works How it works Together?Together?
05/01/23 15
MONSUR AHMED SHAFIQ ID- 151-15 - 5439
05/01/23 16
PCM VS DMPCM VS DMPCM
DM05/01/23 17
PCM VS DMPCM VS DM
05/01/23 18
Limitations of the Limitations of the systemsystem
• Slope overload• When the analog signal has a high rate of
change, the DM can “fall behind” and a distorted output occurs
05/01/23 19