DIGITAL COMMUNICATION
Unit 1
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Analog Pulse Modulation
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Generation and Demodulation of Pulse Amplitude Modulation
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Pulse Width Modulation
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Pulse Position Modulation
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PAM/TDM System
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Spectra of Pulse Modulated
Signals
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SNR Calculations for Pulse
Modulation Systems
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Waveform Coding: Sampling
Theorem for Band Pass Signals
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Quantization
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PCM
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DPCM
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Delta Modulation
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Adaptive Delta Modulation- Design of Typical Systems and
Performance Analysis
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Unit 2
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Baseband Shaping for Data Transmission
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Discrete PAM Signals
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Power Spectra of Discrete
PAM Signals
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Pulse Shaping
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Inter Symbol Interference
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Nyquist Criterion for Zero ISI & for Distortion-less Nyquist
Criterion for Zero ISI & for
Distortion-less Baseband Binary Transmission
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Correlative Coding
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Signaling with Duo-Binary Pulses
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Eye Diagram
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Equalization
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Adaptive Equalization for Data Transmission
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Scrambling and Descrambling
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Unit3
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Signal space concepts
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Analogy between Signals and Vectors
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L2 Space
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Norm and Inner Product
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Decomposition of a Signal and Signal Components
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Complex Signal Space and Orthogonality
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Orthogonal Signal Set
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Base-Band Pulse Data Transmission
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Gram-Schmidt
Orthogonalization Procedure
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Unit 4
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Detection and Estimation
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Review of Gaussian Random Process
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Detection of Known Signals in Noise
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Optimum Threshold Detection
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Optimum Receiver for AWGN Channel
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Matched Filter and Correlation
Receivers
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Decision Procedure: Maximum A-
Posteriori Probability Detector
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Maximum Likelihood Detector
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Probability of Error
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Bit Error Rate
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Wiener Filter for Waveform
Estimation
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Linear Prediction
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Unit 5
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Digital modulation schemes
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Coherent Binary Schemes
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ASK
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FSK
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PSK
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MSK
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GMSK
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Coherent M-ary Schemes
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Non-Coherent Schemes
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Calculation of Average Probability
of Error for Different Modulation Schemes
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Power Spectra of Digitally Modulated
Signals
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DQPSK
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QPSK
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OQPSK
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pi/4 QPSK
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8-PSK
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16 QAM
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64 QAM
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