EC1291 Analog and Digital Communication Syllabus

EC1291        ANALOG AND DIGITAL COMMUNICATION                   3  1  0  100

AIM
To study about the various modulation techniques like amplitude and angle modulation, that is used for data transmission and reception of analog signals and also to understand about the modulation techniques used for digital transmission along with spread spectrum and multiple access techniques.

OBJECTIVES
•    To study about the amplitude modulation techniques.
•    To study bout the angle modulation techniques.
•    To understand about the modulation techniques used for digital data transmission.
•    To have the knowledge about the digital communication.
•    To study about the spread spectrum and multiple access techniques.

UNIT I     AMPLITUDE MODULATION: TRANSMISSION AND RECEPTION                           9
Principles of amplitude modulation - AM envelope, frequency spectrum and bandwidth, modulation index and percent modulation, AM power distribution, AM modulator circuits –
low level AM modulator, medium power AM modulator, AM transmitters – Low level transmitters, high level transmitters, receiver parameters, AM reception – AM receivers – TRF, super heterodyne receiver, double conversion AM receivers.

UNIT II     ANGLE MODULATION: TRANSMISSION AND RECEPTION                                      9
Angle modulation - FM and PM waveforms, phase deviation and modulation index, frequency deviation, phase and frequency modulators and demodulators, frequency spectrum of Angle – modulated waves. Bandwidth requirements for Angle-modulated waves, commercial Broadcast band FM, Average power of an angle-modulated wave, frequency and phase modulators, A direct FM transmitters, Indirect transmitters, Angle modulation Vs amplitude modulation, FM receivers: FM demodulators, PLL FM demodulators, FM noise suppression, frequency verses phase modulation.
UNIT III     DIGITAL TRANSMISSION AND DATA COMMUNICATION                       9
Introduction, pulse modulation, PCM – PCM sampling, sampling rate, signal to quantization noise rate, companding – analog and digital – percentage error, delta modulation, adaptive delta modulation, differential pulse code modulation, pulse transmission – ISI, eyepattern, Data communication history, standards, data communication circuits, data communication codes, Error control, Hardware, serial and parallel interfaces, data modems, - Asynchronous modem, Synchronous modem, low-speed modem, medium and high speed modem, modem control.

UNIT IV     DIGITAL COMMUNICATION                                       9
Introduction, Shannon limit for information capacity, digital amplitude modulation, frequency shift keying, FSK bit rate and baud, FSK transmitter, BW consideration of FSK, FSK receiver, phase shift keying – binary phase shift keying – QPSK, Quadrature Amplitude modulation, bandwidth efficiency, carrier recovery – squaring loop, Costas loop, DPSK.

UNIT V     SPREAD SPECTRUM AND MULTIPLE ACCESS TECHNIQUES                               9         
Introduction, Pseudo-noise sequence, DS spread spectrum with coherent binary PSK, processing gain, FH spread spectrum, multiple access techniques – wireless communication, TDMA and FDMA, wireless communication systems, source coding of speech for wireless communications.

TUTORIAL 15

TOTAL : 60
TEXT BOOKS
1.    Wayne Tomasi, “Electronic Communication Systems: Fundamentals Through Advanced”, Pearson Education, 2001. (UNIT I-IV Chapters- 3,4,6,7,12,13,15).
2.    Simon Haykin, “Communication Systems”, 4th Edition, John Wiley & Sons., 2001. (Unit V Chapters- 7,8).

REFERENCES
1.    Blake, “Electronic Communication Systems”, Thomson Delmar Publications, 2002.
2.    Martin S.Roden, “Analog and Digital Communication System”, 3rd Edition, PHI, 2002.

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