Principles of Communication (Part 1)
Principles of Communication (Part 1). Instructor: Prof. Aditya K. Jagannatham, Department of Electrical Engineering, IIT Kanpur. This course covers fundamental concepts of communication systems, which are essential for the understanding of advanced courses in digital/ wireless communication systems. Beginning with various basic tools such as Fourier Series/ Transform, the course will also cover several important modulation techniques such as Amplitude Modulation, Frequency Modulation, Phase Modulation etc. Sampling process and Quantization, including Nyquist criterion and reconstruction of the original signal from the sampled signal
will be dealt with in the later parts of the course. (from nptel.ac.in)
Lecture 01  Basics  Definition of Energy and Power of Signals 
Lecture 02  Frequency Domain Representation and Introduction to Discrete Fourier Series 
Lecture 03  Discrete Fourier Series Example and Parseval's Theorem for Periodic Signals 
Lecture 04  Fourier Transform (FT), Inverse Fourier Transform (IFT) of Continuous Signals 
Lecture 05  Modulation Property of Fourier Transform, Dirac Delta or Unit Impulse Function 
Lecture 06  Duality Property of Fourier Transform, Introduction to Linear Time Invariant Systems 
Lecture 07  Transmission of a Signal through Linear Time Invariant Systems, Crosscorrelation of Signals 
Lecture 08  Autocorrelation of Signals and Energy Spectral Density (ESD) 
Lecture 09  Example for Autocorrelation of Signals and Energy Spectral Density (ESD) 
Lecture 10  Introduction to Amplitude Modulation (AM), Modulation Index, Envelope Distortion and Over Modulation 
Lecture 11  Spectrum of AM Signals and Introduction to Envelope Detection 
Lecture 12  Envelope Detection for AM Signals and Time Constant for Capacitor in Envelope Detector 
Lecture 13  Power of AM Signals and Power Efficiency of AM Signals 
Lecture 14  Double Sideband (DSB) Suppressed Carrier (SC) Modulation 
Lecture 15  DSBSC Demodulation, Noncoherent Demodulation, Impact of Carrier Phase Offset 
Lecture 16  Carrier Phase Offset Example for DSBSC Demodulation 
Lecture 17  Phase Synchronization using Costa Receiver for DSBSC 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 SSB Modulation Signals through Frequency Discrimination 
Lecture 21  Frequency Domain Description of Hilbert Transform 
Lecture 22  Time Domain Description of Hilbert Transform 
Lecture 23  Phase Shifting Method for Generation of SSB Modulated Signals based on Hilbert Transform 
Lecture 24  Complex PreEnvelope and Complex Envelope of Passband Signals 
Lecture 25  Complex PreEnvelope and Complex Envelope of QCM Signals 
Lecture 26  Introduction to Vestigial Sideband (VSB) Modulation 
Lecture 27  Properties of VSB Filter for Reconstruction of Message Signal without Distortion 
Lecture 28  Introduction to Angle Modulation, Description of Phase Modulation and Frequency Modulation 
Lecture 29  Frequency Modulation with Sinusoidal Modulation Signal and Pictorial Examples 
Lecture 30  Indirect Method for Generation of FM Signals  Generation of Narrowband FM Signals 
Lecture 31  Generation of Wideband FM Signals 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 a Sampled Signal, Aliasing and the Nyquist Sampling Theorem 
Lecture 37  Ideal Impulse Train Sampling, Reconstruction of Original Signal from Samples, Sinc Interpolation 
Lecture 38  Introduction to Pulse Amplitude Modulation, Sample and Hold, Flat Top Sampling 
Lecture 39  Spectrum of PAM Signals, Reconstruction of Original Signal from PAM Signal 
Lecture 40  Introduction to Quantization, Uniform Quantizer, MidTread Quantizer 
Lecture 41  MidRise Quantizer, Quantization Error, Probability Density Function (PDF) 
Lecture 42  Introduction to LloydMax Quantization Algorithm, Optimal Quantizer Design 
Lecture 43  LloydMax Quantization Algorithm, Iterative Computation of Optimal Quantization Levels and Intervals 
Lecture 44  Companding for Nonuniform Quantization, Mulaw and Alaw Compressors 
Lecture 45  Introduction to Delta Modulation, Onebit Quantizer 
Lecture 46  Signal Reconstruction in Delta Modulation, Distortions in Delta Modulation 
Lecture 47  Differential Pulse Code Modulation (DPCM), DPCM Signal Reconstruction 
Lecture 48  Frequency Mixing and Translation in Communication Systems, Heterodyne Receiver 
Lecture 49  Frequency Translation and Superheterodyne Receiver 
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 of Time Division Multiplexing (TDM) 
References 
Principles of Communication (Part 1)
Instructor: Prof. Aditya K. Jagannatham, Department of Electrical Engineering, IIT Kanpur. This course covers fundamental concepts of communication systems.
