EC25C11 Analog and Digital Communication – Semester IV – ECE – R-2025

Subject Code & Name: EC25C11 – Analog and Digital Communication

Regulation: R-2025

Semester: IV (Fourth Semester)

Branch: B.E. Electronics and Communication Engineering (ECE)

Credits / L-T-P: 4 Credits | L-T-P: 3-1-0

Course Objectives

• To impart knowledge in analog and digital modulation and demodulation techniques, and to introduce the applications of communication systems.

Full Unit-wise Syllabus

Unit I – Analog Modulation

Review of Fourier and Hilbert Transforms-Amplitude Modulation – AM, DSBSC, SSBSC, VSB– Spectral analysis of modulated signal, Angle modulation and demodulation: Narrow band, Wideband FM - Spectral analysis of modulated signal.

Unit II – Digital Baseband Modulation

Schematic of digital communication systems, Sampling - Quantization – Uniform and non-uniform quantization – Quantization noise– Speech Coders: Companding laws of speech signals, PCM, DPCM, ADPCM, DM, ADM.

Unit III – Source Coding and Channel Coding

Measure of information – Entropy – Source Coding: Source coding theorem, Shannon- Fano coding, Huffman Coding - Channel Coding: Shannon-Hartley law, Linear block codes, Cyclic codes, syndrome decoding, Convolutional codes, Viterbi decoding

Unit IV – Base Band Signaling

Line codes: RZ, NRZ, Manchester, Binary N-zero substitution codes - PSDs, ISI, Pulse shaping, Eye diagram

Unit V – Band Pass Signaling

Generation and detection of coherent schemes: BPSK, BFSK, QPSK- BER and Power Spectral Density Comparison- Generation and detection of non-coherent schemes: BFSK, DPSK, Overview of QAM, MSK.

Activities: Quiz, simulations, assignment, project.

Course Outcomes (COs)

• CO1: Define and explain the fundamental concepts, principles, and signal representations used in analog and digital communication systems.
• CO2: Analyze analog modulation techniques (AM, FM, PM), digital baseband schemes, and signal characteristics to understand system performance in communication systems.
• CO3: Evaluate source coding, channel coding, and bandpass signaling techniques to assess their effectiveness in reliable data transmission.
• CO4: Design communication system modules by selecting appropriate modulation schemes, coding techniques, and signal processing methods for real-world applications.

Assessment Pattern (Quick Note)

• Weightage: Continuous Assessment 40% | End Semester Examinations 60%
• Internal methodology: Assignment (20%), Software activity (20%), Quiz (20%), Internal Examinations (40%)

Source: Official Anna University – B.E. Electronics and Communication Engineering R-2025 Syllabus
Last Updated: October 2026