NOC:Principles of Communication - Part 1


Lecture 1 - Basics - Definition of Energy and Power of Signals


Lecture 2 - Frequency Domain Representation and Introduction to Discrete Fourier Series


Lecture 3 - Discrete Fourier Series Example and Parseval's Theorem for Periodic Signals


Lecture 4 - Fourier Transform (FT), Inverse Fourier Transform (IFT) of Continuous Signals, Example of FT of Pulse and Sinc Function


Lecture 5 - Modulation Property of Fourier Transform, Dirac Delta or Unit Impulse Function - Definition and Fourier Transform


Lecture 6 - Duality Property of Fourier Transform and Introduction to Linear Time Invatiant (LTI) Systems


Lecture 7 - Transmission of Signal through Linear Time Invariant (LTI) Systems and Cross- Correlation of Signals


Lecture 8 - Auto-Correlation of Signal and Energy Spectral Density (ESD)


Lecture 9 - Example for Auto-Correlation of Signal and Energy Spectral Density (ESD)


Lecture 10 - Introduction to Amplitude Modulation (AM), Modulation Index, Envelope Distortion and Over Modulation


Lecture 11 - Spectrum of Amplitude Modulated(AM) Signals and Introduction to Envelope Detection


Lecture 12 - Envelope Detection for Amplitude Modulated (AM) Signals and Time Constant for Capacitor in Envelope Detector


Lecture 13 - Power of Amplitude Modulated (AM) Signals and Power Efficiency of AM Signals


Lecture 14 - Double Sideband (DSB) Suppressed Carrier (SC) Modulation, Spectrum of DSB-SC Signals and Coherent Demodulation


Lecture 15 - Double Sideband(DSB) Suppressed Carrier (SC) Demodulation, Non-coherent demodulation, Impact of Carrier Phase Offset


Lecture 16 - Carrier Phase Offset Example for Double Sideband (DSB) Suppressed Carrier (SC) Demodulation- Wireless Cellular Communication with User Mobility


Lecture 17 - Phase Synchronization using Costas Receiver for Double Sideband (DSB) Suppressed Carrier (SC) Demodulation


Lecture 18 - Introduction to Quadrature Carrier Multiplexing (QCM) and Demodulation of QCM Signals.


Lecture 19 - Introduction to Single Sideband (SSB) Modulation


Lecture 20 - Generation of Single Sideband (SSB) Modulation Signals through Frequency Discrimination


Lecture 21 - Frequency Domain Description of Hilbert Transform – Fourier Spectrum of the Hilbert Transformer


Lecture 22 - Time Domain Description of Hilbert Transform – Impulse Response of the Hilbert Transformer


Lecture 23 - Phase Shifting Method for Generation of Single Sideband (SSB) Modulated Signals based on Hilbert Transform


Lecture 24 - Complex Pre-Envelope and Complex Envelope of Passband Signals


Lecture 25 - Complex Pre- Envelope and Complex Envelope of QCM (Quadrature Carrier Modulated) Signals


Lecture 26 - Introduction to Vestigial Side Band(VSB) Modulation and Non- Ideal Filtering, Spectral Efficiency


Lecture 27 - Properties of Vestigial Side Band Filter for Reconstruction of Message Signal without Distortion


Lecture 28 - Introduction to Angle Modulation, Description of Phase Modulation (PM) and Frequency Modulation (FM)


Lecture 29 - Frequency Modulation (FM) with Sinusoidal Modulation Signal and Pictorial Examples, Insights of PM and FM signals


Lecture 30 - Indirect Method for Generation of FM Signals - Generation of Narrowband FM Signal


Lecture 31 - Indirect Method for Generation of FM Signals - Generation of Wideband FM Signal through Frequency Multiplication


Lecture 32 - Spectrum of Frequency Modulated (FM) Signals


Lecture 33 - Bandwidth of Frequency Modulated (FM) Signals - Carson's Rule


Lecture 34 - Demodulation of Frequency Modulated (FM) Signals, Condition of Envelope Detection


Lecture 35 - Analog to Digital Conversion of Signals and Introduction to Sampling


Lecture 36 - Spectrum of Sampled Signal, Aliasing and Nyquist Sampling Theorem


Lecture 37 - Ideal Impluse Train Sampling, Reconstruction of Original Signal from Samples, Sinc Interpolation


Lecture 38 - Introduction to Pulse Amplitude Modulation (PAM), Sample and Hold, Flat Top Sampling


Lecture 39 - Pulse Amplitude Modulation (PAM), Spectrum of PAM Signal , Reconstruction of Original Signal from PAM Signal, Equalization


Lecture 40 - Introduction to Quantization, Uniform Quantizer, Mid- Tread Quantizer


Lecture 41 - Quantization, Mid- Rise Quantizer, PDF and Power of Quantization Noise, Quantization Noise Power versus Quantizer Resolution


Lecture 42 - Introduction to Lloyd- Max Quantization Algorithm, Optimal Quantizer Design


Lecture 43 - Lloyd- Max Quantization Algorithm, Iterative Computation of Optimal Quantization Levels and Intervals


Lecture 44 - Companding for Non- Uniform Quantization, Mu-law Compressor, A- Law Compressor


Lecture 45 - Introduction to Delta Modulation, One-bit Quantizer


Lecture 46 - Signal Reconstruction in Delta Modulation, Schematic Diagrams, Slope Overload Distortion and Granular Noise


Lecture 47 - Differential Pulse Coded Modulation (DPCM), DPCM Signal Reconstruction and Schematic Diagram


Lecture 48 - Frequency Mixing and Translation in Communication Systems, Heterodyne and Super Heterodyne Receivers


Lecture 49 - Frequency Translation and Super Heterodyne Receivers, Problem of Image Frequency


Lecture 50 - Frequency Division Multiplexing (FDM), Carrier Spacing in FDM


Lecture 51 - Time Division Multiplexing (TDM), Operation of TDM, Sample Spacing in TDM


Lecture 52 - Bandwidth Requirements for Time Division Multiplexing (TDM), The T1 TDM System : A Case Study