Digital Communication
- Lecture Notes, Study Materials and Important questions answers

Subject : Digital Communication

SAMPLING and QUANTIZATION

1. Sampling theorem for Low pass signals - Answer (click here)
2. Aliasing and signal reconstruction - Answer (click here)
3. Quantization - Answer (click here)
4. Types of Quantizers: Uniform and Non uniform quantization - Answer (click here)
5. Quantization Noise and Signal-to-Noise - Answer (click here)
6. Companding of Speech signal - Answer (click here)
7. Advantages of Non Uniform Quantization - Answer (click here)
8. Pulse code Modulation(PCM) - Answer (click here)
9. Time-Division Multiplexing (TDM) - Answer (click here)
10. Important Short Questions and Answers: Sampling & Quantization - Answer (click here)

WAVEFORM CODING

1. Linear Predictive Coding - Answer (click here)
2. Differential Pulse Code Modulation (DPCM) - Answer (click here)
3. Delta Modulation (DM) - Answer (click here)
4. Adaptive Delta Modulation - Answer (click here)
5. Important Short Questions and Answers: Waveform Coding - Answer (click here)

BASEBAND TRANSMISSION

1. Properties of Line Codes - Answer (click here)
2. Power spectral density of unipolar NRZ line code - Answer (click here)
3. Manchester encoding - Answer (click here)
4. Nyquist Criterion for Zero-ISI - Answer (click here)
5. Inter symbol Interference - Answer (click here)
6. Eye Pattern - Answer (click here)
7. Equalising Filter - Answer (click here)
8. Important Short Questions and Answers: Baseband Transmission - Answer (click here)

DIGITAL MODULATION SCHEME

1. Geometric representation of Signals - Answer (click here)
2. Generation and Coherent Detection of BPSK Signals - Answer (click here)
3. Power Spectrum or BPSK Modulated Signal - Answer (click here)
4. Frequency Shit Keying Modulation - Answer (click here)
5. Quadrature Phase Shift Keying (QPSK) - Answer (click here)
6. QAM(Quadrature Amplitude Modulation) - Answer (click here)
7. Important Short Questions and Answers: Digital Modulation Scheme - Answer (click here)

ERROR CONTROL CODING

1. Linear block and Hamming codes - Answer (click here)
2. Convolutional codes - Answer (click here)
3. Vitterbi Decoding Algorithm - Answer (click here)
4. Important Short Questions and Answers: Error Control Coding - Answer (click here)