PREAMBLE PREAMBLE OFOF

DIGITAL DIGITAL COMMUNICATIONCOMMUNICATION

INDEXINDEX

• PREAMBLE STRUCTURE• HOLLISTIC FIX• KEY CONCEPT• KEY RESEARCH AREA• KEY APPLICATION• INDUSTRIAL APPLICATION• RESEARCH• HOW WE STUDY• KEY JOBS• PROJECTS ONE CAN DO• TRENDS

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PREMBLE STRUCTUREPREMBLE STRUCTURE

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1. NAME OF THE INSTRUCTOR – Deepti Gupta

2. CABIN LOCATION -

3. TELEPHONENO. -

4. EMAIL-ID –

5. MEETING HOURS–

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HOLLISTIC FIX OF DIGITAL HOLLISTIC FIX OF DIGITAL COMMUNICATIONCOMMUNICATION

PREREQUISITES Basic Knowledge of Logarithms (Before 12th

standard)

(12th standard)

• Basic Knowledge of Probability.

• Usage of Probability & its applications

• Knowledge of Waveforms

HOLLISTIC FIX………CONTINUEDHOLLISTIC FIX………CONTINUED

PRE REQUISTES(5th Semester)

Basic Principles of Communication

Conversion of Analog to Digital through

• Sampling• Quantization• Encoding

Different Modulation Techniques• Amplitude Modulation• Frequency Modulation• Phase Modulation 6

HOLLISTIC FIX OF DC………CONTINUEDHOLLISTIC FIX OF DC………CONTINUED

ADVANCE COURSE (6th-7th SEM)

• Digital Signal Processing• Satellite Communication• Radar & Navigation• Optical Fiber Communication

(8th SEM)

Data & Communication Networks

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SCOPE IN RELATED FIELDS…

• Mobile Communication• Wireless Technologies• Microprocessors • Integrated Circuits• Aerospace• Networking

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Block Diagram of DC

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Probability= Total no. of ways event can

occur/Total no. of possible outcomes

Fig. showing certain dots selected from large no. of dots

Also watch-- http://nptel.iitm.ac.in/showVideo.php?

v=p6lze5nPkzk

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Also watch-- http://nptel.iitm.ac.in/showVideo.php?

v=nvmo9voRiSs12

BASIC SAMPLING EXAMPLE FOR A POPULATION CENSUSAlso watch-- http://nptel.iitm.ac.in/showVideo.php?v=WUCMavXbJo4

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Next stage to obtain a Digital signal after Sampling is quantizationAlso watch-- http://nptel.iitm.ac.in/showVideo.php?v=oFEOryECzug 14

• Main cause for degradation of pulse is noise• Regenerative repeaters are used to get the pulse in its original form

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Modulation is a technique where the properties of a carrier wave changes in accordance with the digital data.

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Transmitter & receiver section of the Communication Equipment should behave sequentially

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Coding is done to remove the interference

Once the coding is done, data becomes error free & can be detected uniquely

The interference can cause the distortion of data.

CHARLIE TO ALPHA!!!!!! CHARLIE TO ALPHA!!!!!!!

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KEY RESEARCH AREA OF DIGITAL COMMUNICATION

Research areas in cluster of DC:

• Fast Multiple Access more than the speed of light.

• To reduce the complexity & cost of Receiver & Transmitter used in DC components.

• To reduce the noise to a zero level

• Efficient long range communications

• To increase the Channel Capacity

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PRIVATE SECTOR  Texas Instruments www.ti.com Alcatel Lucent.www.alcatel-lucent.in NSNwww.nokiasiemensnetworks.com ST microelectronicswww.st.com Reliance Communications www.relianceinfo.com Bharti Airtelwww.airtel.in

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Electronics Corporation of India Limited. www.ecil.co.in Bharat Electronics Limited.www.bel-india.com Hindustan Aeronautics Limited.www.hal-india.com Defense Research & Development Organization.www.drdo.org Bharat Sanchar Nigam Limited.www.bsnl.co.in

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Tutorial Plan Handouts + LAN Server

Reference Sources Handouts + LAN Server

Lecture Plan Handouts + LAN Server

Individual Assignments LAN Server

Group Assignments Handouts + LAN Server

UPTU Paper Mapping LAN Server

I Google Will be shared by individual Gmail Ids

Kit based Projects:• LED Based Water Level indicator• FM Receiver• Intercom 2 Way• Digital ClockWireless based Projects:• Wireless Based Surveillance• Wireless Video Transmitter• Wireless RF Based Heart Beat CounterTele Based Projects:• Telephone call recorder• Tele based Home security• Optical Fiber based Data Communication

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March 10, 1876- Telephone by Graham Bell

Early 1900’s- Teletypewriter

1960- Character coding in the form of 8bit character

1967- Voice Digitization technique- PCM

1969-Caterphone

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1974- Data phone Digital Services

1980-Dial Modem Technology (FAX)

1984-Client Server Architectures

1990’s- VPN

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Till date- Broadband ISDN, Cell based transmission, Satellite & GPS, VOIP, Video Confrencing

Future Trends- High Speed communication across the galaxies

Breaking the Shannon Limit

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THANK YOU

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