Delta Modulation

PRESENTATION

ON

GROUP MEMBERGROUP MEMBER SAJIBUL HASSAN NAHIAN AHMED TARIQUL ISLAM MONSUR AHMED SHAFIQ OMAR FARUQ

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SAJIBUL HASSAN ID-151-15-4986

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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.

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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.

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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.

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NAHIAN AHMED ID- 151-15-5137

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Concept of DMConcept of DM

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DM Block DiagramDM Block Diagram

• If signal is large, the next bit in the digital data is 1, otherwise, it is O.

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TARIQUL ISLAM ID -151-15-5144

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DemodulationDemodulation• Demodulation is digital-to-analog signal

conversion.

• It’s the reverse System of modulation.

• Demodulation was first used in radio receivers.

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De M Block DiagramDe M Block Diagram

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OMAR FARUQID-151-15-5444

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Simple Simple Implementation of a Implementation of a

DM systemDM system

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How it works How it works Together?Together?

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MONSUR AHMED SHAFIQ ID- 151-15 - 5439

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PCM VS DMPCM VS DMPCM

DM05/01/23 17

PCM VS DMPCM VS DM

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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

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