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Electrical Electonics and Comunication Engineering EEE ECE

Digital Communication - EC6501

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

WAVEFORM CODING


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

BASEBAND TRANSMISSION


-> 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

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

ERROR CONTROL CODING


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

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