Digital Communication

EC8501 Regulation 2017 Digital Communication

UNIT I : INFORMATION THEORY

Information Theory
Entropy
Discrete Memory less Channel
Channel Coding Theorem
Source Coding
Shannon-Fano Coding
Huffman Coding
Shannon-Hartley Theorem
Important Questions and Answers: Information Theory

UNIT II : WAVEFORM CODING AND REPRESENTATION

Linear Predictive Coding
Differential Pulse Code Modulation (DPCM)
Delta Modulation (DM)
Adaptive Delta Modulation
Important Short Questions and Answers: Waveform Coding

UNIT IIII BASEBAND TRANSMISSION AND RECEPTION

Properties of Line Codes
Power spectral density of unipolar NRZ line code
Manchester encoding
Nyquist Criterion for Zero-ISI
Inter symbol Interference
Eye Pattern
Equalising Filter
Important Short Questions and Answers: Baseband Transmission

UNIT IV : DIGITAL MODULATION SCHEME

Geometric representation of Signals
Generation and Coherent Detection of BPSK Signals
Power Spectrum or BPSK Modulated Signal
Frequency Shit Keying Modulation
Quadrature Phase Shift Keying (QPSK)
QAM(Quadrature Amplitude Modulation)
Important Short Questions and Answers: Digital Modulation Scheme

UNIT V : ERROR CONTROL CODING

Linear block and Hamming codes
Convolutional codes
Vitterbi Decoding Algorithm
Important Short Questions and Answers: Error Control Coding

EC6501 Regulation 2013 Digital Communication

UNIT I : SAMPLING and QUANTIZATION

Sampling theorem for Low pass signals
Aliasing and signal reconstruction
Quantization
Types of Quantizers: Uniform and Non uniform quantization
Quantization Noise and Signal-to-Noise
Companding of Speech signal
Advantages of Non Uniform Quantization
Pulse code Modulation(PCM)
Time-Division Multiplexing (TDM)
Important Short Questions and Answers: Sampling & Quantization

UNIT II : WAVEFORM CODING

Linear Predictive Coding
Differential Pulse Code Modulation (DPCM)
Delta Modulation (DM)
Adaptive Delta Modulation
Important Short Questions and Answers: Waveform Coding

UNIT III : BASEBAND TRANSMISSION

UNIT IV : DIGITAL MODULATION SCHEME

UNIT V : ERROR CONTROL CODING

Linear block and Hamming codes
Convolutional codes
Vitterbi Decoding Algorithm
Important Short Questions and Answers: Error Control Coding

Digital Communication - EC8501, EC6501

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Important Questions

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EC8501 Regulation 2017 Digital Communication

UNIT I : INFORMATION THEORY

UNIT II : WAVEFORM CODING AND REPRESENTATION

UNIT IIII BASEBAND TRANSMISSION AND RECEPTION

UNIT IV : DIGITAL MODULATION SCHEME

UNIT V : ERROR CONTROL CODING

EC6501 Regulation 2013 Digital Communication

UNIT I : SAMPLING and QUANTIZATION

UNIT II : WAVEFORM CODING

UNIT III : BASEBAND TRANSMISSION

UNIT IV : DIGITAL MODULATION SCHEME

UNIT V : ERROR CONTROL CODING

EC8501 Regulation 2017 Digital Communication

UNIT I : INFORMATION THEORY

UNIT II : WAVEFORM CODING AND REPRESENTATION

UNIT IIII BASEBAND TRANSMISSION AND RECEPTION

UNIT IV : DIGITAL MODULATION SCHEME

UNIT V : ERROR CONTROL CODING

EC6501 Regulation 2013 Digital Communication

UNIT I : SAMPLING and QUANTIZATION

UNIT II : WAVEFORM CODING

UNIT III : BASEBAND TRANSMISSION

UNIT IV : DIGITAL MODULATION SCHEME

UNIT V : ERROR CONTROL CODING