EC6501 DIGITAL COMMUNICATION LTPC 3003 UNIT I SAMPLING & QUANTIZATION 9 Low pass sampling – Aliasing- Signal Reconstruction-Quantization - Uniform & non-uniform quantization quantization noise - Logarithmic Companding of speech signal- PCM - TDM UNIT II WAVEFORM CODING 9 Prediction filtering and DPCM - Delta Modulation - ADPCM & ADM principles-Linear Predictive Coding UNIT III BASEBAND TRANSMISSION 9 Properties of Line codes- Power Spectral Density of Unipolar / Polar RZ & NRZ – Bipolar NRZ - ManchesterISI – Nyquist criterion for distortionless transmission – Pulse shaping – Correlative coding - Mary schemes – Eye pattern - Equalization UNIT IV DIGITAL MODULATION SCHEME 9 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 9 Channel coding theorem - Linear Block codes - Hamming codes - Cyclic codes - Convolutional codes - Vitterbi Decoder TOTAL: 45 PERIODS OUTCOMES: Upon completion of the course, students will be able to 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 TEXT BOOK: 1. S. Haykin, “Digital Communications”, John Wiley, 2005 REFERENCES: 1. B. Sklar, “Digital Communication Fundamentals and Applications”, 2nd Edition, Pearson Education, 2009 2. B.P.Lathi, “Modern Digital and Analog Communication Systems” 3rd Edition, Oxford University Press 2007. 3. H P Hsu, Schaum Outline Series - “Analog and Digital Communications”, TMH 2006 4. J.G Proakis, “Digital Communication”, 4th Edition, Tata Mc Graw Hill Company, 2001.