EC6501- Digital Communication L T P C rd year 5 th semester By Jayaseelan. J AP/ ECE

OBJECTIVES: To know the principles of sampling & quantization To study the various waveform coding schemes To learn the various baseband transmission schemes To understand the various Band pass signaling schemes To know the fundamentals of channel coding

UNIT I SAMPLING & QUANTIZATION Low pass sampling Aliasing Signal Reconstruction Quantization - Uniform & non-uniform quantization Quantization noise Logarithmic Companding of speech signal PCM - TDM

UNIT II WAVEFORM CODING Prediction filtering DPCM Delta Modulation ADPCM ADM principles Linear Predictive Coding

UNIT III BASEBAND TRANSMISSION Properties of Line codes Power Spectral Density of Unipolar / Polar RZ & NRZ – Bipolar NRZ – Manchester ISI Nyquist criterion for distortionless transmission Pulse shaping Correlative coding Mary schemes Eye pattern Equalization

UNIT IV DIGITAL MODULATION SCHEME Geometric Representation of signals Generation, detection, PSD & BER of Coherent BPSK,BFSK & QPSK QAM Carrier Synchronization Structure of Non-coherent Receivers Principle of DPSK

UNIT V ERROR CONTROL CODING Channel coding theorem Linear Block codes Hamming codes Cyclic codes Convolutional codes Vitterbi Decoder

OUTCOMES Design PCM systems Design and implement base band transmission schemes Design and implement band pass signaling schemes Analyze the spectral characteristics of band pass signaling schemes and their noise performance Design error control coding schemes

REFERENCES J.S. Chithode, “Digital Communications”, 1 st edition, Technical Publications. S. Haykin, “Digital Communications”, John Wiley, 2005 B. Sklar, “Digital Communication Fundamentals and Applications”, 2nd Edition, Pearson Education, 2009 B.P.Lathi, “Modern Digital and Analog Communication Systems” 3rd Edition, Oxford University Press H P Hsu, Schaum Outline Series - “Analog and Digital Communications”, TMH 2006 J.G Proakis, “Digital Communication”, 4th Edition, Tata Mc Graw Hill Company, 2001.

Seminar Plan S.NOD.NOREG NONAME SEMINAR DETAILS ANANDHI.R Low pass sampling – Aliasing ANITHA.A Linear Predictive Coding ARAVIND.R Properties of Line codes BALATHANGAM.R Principle of DPSK JAGADESH.R.P Cyclic codes KRISHNA KUMAR.R Uniform & non-uniform quantization - quantization noise KRISHNAVARTHINI.M ADM principles KRISHNAVENI.A Power Spectral Density of Unipolar / Polar RZ & NRZ MAHALAKSHMI.R QAM MATHIPRIYA.P Hamming codes MATHIVATHINI.V Logarithmic Companding of speech signal MEHARAJ BEGUM.R ADPCM PAVITHRA.R Bipolar NRZ - Manchester PRAVEENA.T PRIYADHARSHINI.K BFSK RAMYA.G Linear Block codes RAMYA DEVI.B PCM RANJITHA.R Delta Modulation SABEENA.P ISI SANKARI.M QPSK SHREEN SITHARA.M Vitterbi Decoder SIVAKAMI.N TDM SUGANYA.P DPCM SWATHI.K Eye pattern VIDHYA.J Generation, detection, PSD & BER of Coherent BPSK VISWADHARSHINI.G Convolutional codes NARESH KUMAR. K Signal Reconstruction PRAVEEN.N Prediction filtering PRITHIVIRAJ.G Correlative coding VINOTH KUMAR.S structure of Non-coherent Receivers

Assignment Plan S.NOD.NOREG NONAME Assignment Details UNIT-IUNIT-IIUNIT-IIIUNIT-IVUNIT-V ANANDHI.R Low pass sampling – Aliasing Linear Predictive Coding Properties of Line codes Principle of DPSKCyclic codes ANITHA.A ARAVIND.R BALATHANGAM.R JAGADESH.R.P KRISHNA KUMAR.R Uniform & non- uniform quantization - quantization noise ADM principles Power Spectral Density of Unipolar / Polar RZ & NRZ QAMHamming codes KRISHNAVARTHINI. M KRISHNAVENI.A MAHALAKSHMI.R MATHIPRIYA.P MATHIVATHINI.V Logarithmic Companding of speech signal ADPCM Bipolar NRZ - Manchester BFSKLinear Block codes MEHARAJ BEGUM.R PAVITHRA.R PRAVEENA.T PRIYADHARSHINI.K RAMYA.G PCMDelta ModulationISIQPSKVitterbi Decoder RAMYA DEVI.B RANJITHA.R SABEENA.P SANKARI.M SHREEN SITHARA.M TDMDPCMEye pattern Generation, detection, PSD & BER of Coherent BPSK Convolutional codes SIVAKAMI.N SUGANYA.P SWATHI.K VIDHYA.J VISWADHARSHINI.G Signal Reconstruction Prediction filteringCorrelative coding structure of Non- coherent Receivers Channel coding theorem NARESH KUMAR. K PRAVEEN.N PRITHIVIRAJ.G VINOTH KUMAR.S

Important URL’s OGViN/Digital_Communications_CS3282_powerpoint_ppt_presentation OGViN/Digital_Communications_CS3282_powerpoint_ppt_presentation PA79&dq=cyclic+codes&hl=en&sa=X&ei=q5xyVfPCEIO1uQS6v4CQCA&ved=0CCAQ6AEwAQ PA79&dq=cyclic+codes&hl=en&sa=X&ei=q5xyVfPCEIO1uQS6v4CQCA&ved=0CCAQ6AEwAQ 5xyVfPCEIO1uQS6v4CQCA&ved=0CCUQ6AEwAg#v=onepage&q=cyclic%20codes&f=false 5xyVfPCEIO1uQS6v4CQCA&ved=0CCUQ6AEwAg#v=onepage&q=cyclic%20codes&f=false uniform+quantization+- +quantization+noise&hl=en&sa=X&ei=E51yVZroK8KpuwTHjoLAAQ&ved=0CBwQ6AEwAA#v=onepa ge&q=Uniform%20%26%20non-uniform%20quantization%20-%20quantization%20noise&f=false uniform+quantization+- +quantization+noise&hl=en&sa=X&ei=E51yVZroK8KpuwTHjoLAAQ&ved=0CBwQ6AEwAA#v=onepa ge&q=Uniform%20%26%20non-uniform%20quantization%20-%20quantization%20noise&f=false uniform+quantization+- +quantization+noise&hl=en&sa=X&ei=E51yVZroK8KpuwTHjoLAAQ&ved=0CCEQ6AEwAQ#v=onepag e&q=Uniform%20%26%20non-uniform%20quantization%20-%20quantization%20noise&f=false uniform+quantization+- +quantization+noise&hl=en&sa=X&ei=E51yVZroK8KpuwTHjoLAAQ&ved=0CCEQ6AEwAQ#v=onepag e&q=Uniform%20%26%20non-uniform%20quantization%20-%20quantization%20noise&f=false uniform+quantization+- +quantization+noise&hl=en&sa=X&ei=E51yVZroK8KpuwTHjoLAAQ&ved=0CCwQ6AEwAw#v=onepa ge&q=Uniform%20%26%20non-uniform%20quantization%20-%20quantization%20noise&f=false uniform+quantization+- +quantization+noise&hl=en&sa=X&ei=E51yVZroK8KpuwTHjoLAAQ&ved=0CCwQ6AEwAw#v=onepa ge&q=Uniform%20%26%20non-uniform%20quantization%20-%20quantization%20noise&f=false

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