B.TECH 5TH SEMESTER(ELECTRONICS AND COMMUNICATION ENGINNERING)



                                              DIGITAL COMMUNICATION


Unit 1









Analog Pulse Modulation




Generation and Demodulation of Pulse Amplitude Modulation





Pulse Width Modulation





Pulse Position Modulation








PAM/TDM System




Spectra of Pulse Modulated 
Signals
SNR Calculations for Pulse 




Modulation Systems
Waveform Coding: Sampling 



Theorem for Band Pass Signals



Quantization




PCM



DPCM




Delta Modulation




Adaptive Delta Modulation- Design of Typical Systems and Performance Analysis










Unit 2
Baseband Shaping for Data Transmission





Discrete PAM Signals




Power Spectra of Discrete 
PAM Signals


Pulse Shaping







Inter Symbol Interference
Nyquist Criterion for Zero ISI & for Distortion-less Nyquist Criterion for Zero ISI & for 




Distortion-less Baseband Binary Transmission






Correlative Coding
Signaling with Duo-Binary Pulses




Eye Diagram



Equalization



Adaptive Equalization for Data Transmission






Scrambling and Descrambling
Unit3













Signal space concepts
Analogy between Signals and Vectors




L2 Space








Norm and Inner Product








Decomposition of a Signal and Signal Components



Complex Signal Space and Orthogonality



Orthogonal Signal Set


Base-Band Pulse Data Transmission


Gram-Schmidt 



Orthogonalization Procedure













Unit 4








Detection and Estimation











Review of Gaussian Random Process





Detection of Known Signals in Noise





Optimum Threshold Detection






Optimum Receiver for AWGN Channel







Matched Filter and Correlation Receivers




Decision Procedure: Maximum A- 



Posteriori Probability Detector







Maximum Likelihood Detector







Probability of Error







Bit Error Rate







Wiener Filter for Waveform Estimation







Linear Prediction





Unit 5





Digital modulation schemes









Coherent Binary Schemes







ASK







FSK







PSK







MSK







GMSK







Coherent M-ary Schemes







Non-Coherent Schemes








Calculation of Average Probability of Error for Different Modulation Schemes







Power Spectra of Digitally Modulated Signals







DQPSK







QPSK







OQPSK







pi/4 QPSK







8-PSK







16 QAM







64 QAM



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