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Course Coordinated by
IIT Kanpur
NPTEL
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Electrical Engineering
>> NOC:Principles of Communication  Part 1 (Video) >>
Basics Definition of Energy and Power of Signals
Question in Lecture
Basic tools for communication, Fourier Series/Transform, Properties, Parsevals Relation
Basics Definition of Energy and Power of Signals
Frequency Domain Representation and Introduction to Discrete Fourier Series
Discrete Fourier Series Example and Parseval's Theorem for Periodic Signals
Fourier Transform (FT), Inverse Fourier Transform (IFT) of Continuous Signals, Example of FT of Pulse and Sinc Function
Modulation Property of Fourier Transform, Dirac Delta or Unit Impulse Function  Definition and Fourier Transform
Properties of Fourier Transform (Contd.), LTI Systems, Cross and Autocorrelation, Energy Spectral
Duality Property of Fourier Transform and Introduction to Linear Time Invatiant (LTI) Systems
Transmission of Signal through Linear Time Invariant (LTI) Systems and Cross Correlation of Signals
AutoCorrelation of Signal and Energy Spectral Density (ESD)
Example for AutoCorrelation of Signal and Energy Spectral Density (ESD)
Introduction to Amplitude Modulation (AM), Modulation Index, Envelope Distortion and Over Modulation
Spectrum of AM, Envelope Detection, Power Efficiency, Double Sideband Suppressed Carrier (DSBSC) Mo
Spectrum of Amplitude Modulated(AM) Signals and Introduction to Envelope Detection
Envelope Detection for Amplitude Modulated (AM) Signals and Time Constant for Capacitor in Envelope Detector
Power of Amplitude Modulated (AM) Signals and Power Efficiency of AM Signals
Double Sideband (DSB) Suppressed Carrier (SC) Modulation, Spectrum of DSBSC Signals and Coherent Demodulation
Double Sideband(DSB) Suppressed Carrier (SC) Demodulation, Noncoherent demodulation, Impact of Carrier Phase Offset
Carrier Phase Offset Example for Double Sideband (DSB) Suppressed Carrier (SC) Demodulation Wireless Cellular Communication with User Mobility
Costas Receiver, Quadrature Carrier Multiplexing (QCM) and Demodulation of QCM signals, Single Sideb
Phase Synchronization using Costas Receiver for Double Sideband (DSB) Suppressed Carrier (SC) Demodulation
Introduction to Quadrature Carrier Multiplexing (QCM) and Demodulation of QCM Signals.
Introduction to Single Sideband (SSB) Modulation
Generation of Single Sideband (SSB) Modulation Signals through Frequency Discrimination
Frequency Domain Description of Hilbert Transform – Fourier Spectrum of the Hilbert Transformer
Time Domain Description of Hilbert Transform – Impulse Response of the Hilbert Transformer
Phase Shifting Method for Generation of Single Sideband (SSB) Modulated Signals based on Hilbert Transform
Week5
Complex PreEnvelope and Complex Envelope of Passband Signals
Complex Pre Envelope and Complex Envelope of QCM (Quadrature Carrier Modulated) Signals
Introduction to Vestigial Side Band(VSB) Modulation and Non Ideal Filtering, Spectral Efficiency
Properties of Vestigial Side Band Filter for Reconstruction of Message Signal without Distortion
Introduction to Angle Modulation, Description of Phase Modulation (PM) and Frequency Modulation (FM)
Frequency Modulation (FM) with Sinusoidal Modulation Signal and Pictorial Examples, Insights of PM and FM signals
Indirect Method for Generation of FM Signals  Generation of Narrowband FM Signal
Spectrum of FM Signals, Carsons Rule for FM Bandwidth, Narrowband FM Generation, FM Demodulation, In
Indirect Method for Generation of FM Signals  Generation of Wideband FM Signal through Frequency Multiplication
Spectrum of Frequency Modulated (FM) Signals
Bandwidth of Frequency Modulated (FM) Signals  Carson's Rule
Demodulation of Frequency Modulated (FM) Signals, Condition of Envelope Detection
Analog to Digital Conversion of Signals and Introduction to Sampling
Spectrum of Sampled Signal, Aliasing and Nyquist Sampling Theorem
Ideal Impluse Train Sampling, Reconstruction of Original Signal from Samples, Sinc Interpolation
Introduction to Pulse Amplitude Modulation, Spectrum of PAM Signal and Reconstruction, Quantization,
Introduction to Pulse Amplitude Modulation (PAM), Sample and Hold, Flat Top Sampling
Pulse Amplitude Modulation (PAM), Spectrum of PAM Signal , Reconstruction of Original Signal from PAM Signal, Equalization
Introduction to Quantization, Uniform Quantizer, Mid Tread Quantizer
Quantization, Mid Rise Quantizer, PDF and Power of Quantization Noise, Quantization Noise Power versus Quantizer Resolution
Introduction to Lloyd Max Quantization Algorithm, Optimal Quantizer Design
Lloyd Max Quantization Algorithm, Iterative Computation of Optimal Quantization Levels and Intervals
Companding for Non Uniform Quantization, Mulaw Compressor, A Law Compressor
Week 8
Introduction to Delta Modulation, Onebit Quantizer
Signal Reconstruction in Delta Modulation, Schematic Diagrams, Slope Overload Distortion and Granular Noise
Differential Pulse Coded Modulation (DPCM), DPCM Signal Reconstruction and Schematic Diagram
Frequency Mixing and Translation in Communication Systems, Heterodyne and Super Heterodyne Receivers
Frequency Translation and Super Heterodyne Receivers, Problem of Image Frequency
Frequency Division Multiplexing (FDM), Carrier Spacing in FDM
Time Division Multiplexing (TDM), Operation of TDM, Sample Spacing in TDM
Bandwidth Requirements for Time Division Multiplexing (TDM), The T1 TDM System : A Case Study
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