Gate Ece

This course covers the entire syllabus of Analog Communication Systems ( Amplitude, Frequency and Phase Modulation ) from GATE and ESE point of view.

GATE (Graduate Aptitude Test in Engineering) 2020 & 2021 complete preparation with best educators. Know about the detailed syllabus, best books, exam pattern and dates, previous year question papers a

GATE & ESE

English

Analog Communication Systems for GATE and ESE

Amplitude Modulation

Communications

GATE & ESE - EE, EC

GATE, ESE and IIT-JAM

Ace the toughest competitive and government exams in India 

Test Preparation

This lecture talks about the objective of the course and the topics that we'll be covering in this course.

Course Overview - Analog Communication Systems

In this lecture, the types of communication systems, i.e. Basics of Wired and Wireless Communication Systems have been discussed.

Introduction to Types of Communication Systems

In this course, the basics of Fourier Transform have been introduced.

Basics of Fourier Transform

This lecture covers the important properties of Fourier Transform that are used in analysing various Modulation schemes.

Fourier Transform - Continued

This lecture talks about the channel bandwidth and the signal bandwidth and goes on to talk about the band limiting process.

Signal and Channel Bandwidth

This lecture discusses about the advantages of Wireless communication systems and the need of Modulation, why is it required and what advantages it offers.

Need of Modulation

In this lecture, we have discussed about baseband signals, band pass signals and then derived the general expression for a Amplitude Modulated signal.

Introduction to Amplitude Modulation and General Expression of AM Signal

This lecture discusses the frequency spectrum and Bandwidth of the Amplitude Message Signal

Spectrum of Amplitude Modulated Signal

In this lecture, we have derived the Power and Modulation Efficiency expressions for an Amplitude Modulated Signal

Power of AM Signal and Modulation Efficiency

In this lecture, we have solved some questions on single tone Amplitude Modulation.

Problems on Amplitude Modulation

In this lecture, we have talked about the Multi Tone Amplitude Modulation and derived the parameters like Power, Modulation Efficiency, Voltage and Current Relations.

Multi Tone Amplitude Modulation

In this lecture, we have solved some questions on Multi Tone Amplitude Modulation.

Problems on Multi Tone Amplitude Modulation

This lecture talks about the switching Modulator which is used for the generation of Amplitude Modulated Signal.

Square Law Modulator - Generation of AM Signal

This lecture talks about the switching Modulator used to generate an Amplitude Modulated Signal.

Switching Modulator - Generation of AM Signal

This lecture covers the detailed analysis on Square Law Demodulator, how it functions and what are the disadvantages of it.

Square Law Demodulator - Demodulation of AM Signal

This lecture covers the envelope detector in detail and discusses about how to choose the proper value of RC and what happens if very low and very high values of RC are selected.

Envelope Detector

This lecture discusses about the synchronous detector which is one of the technique for demodulation of an AM signal. The detailed discussion has been carried out what happens if the phase of the local oscillator output differs from that of the carrier signal.

Synchronous Detector

In this lecture, questions have been solved on Amplitude Modulation and Demodulation Techniques that has been covered in the previous lectures. This will help to understand the concepts better and will give an insight how the questions are asked in exam.

Questions on Amplitude Modulation and Demodulation Techniques

This lecture gives an idea of DSB-SC Amplitude Modulation,the general expression and its frequency spectrum.

DSB-SC Amplitude Modulation

In this lecture, we have calculated the power of DSB-SC Signal and then studied about the Multi Tone DSB-SC Modulation.

Multi Tone DSB-SC Modulation

This lecture discusses about the Balanced Modulator and Ring Modulator techniques that can be used to generate the DSB-SC Signal

Generation of DSB-SC Signal

This lecture talks about how to demodulate the DSB-SC signal using Synchronous Detector and have also solved some questions on DSB-SC Amplitude Modulation.

Demodulation of DSB-SC Signal and Practice Questions on DSB-SC

This lecture gives the introduction about the SSB-SC Amplitude Modulation - It's General Expression, Power contained and the bandwidth of the SSB-SC Signal.

SSB-SC Amplitude Modulation

In this lecture, we have studied about the frequency discrimination and the phase discrimination methods for the generation of SSB-SC Signal.

Generation of SSB-SC Signal

In this lecture, we have studied how we demodulate the SSB-SC signal using the Synchronous Detector and also briefly discussed about the Vestigial Sideband Modulation.

Demodulation of SSB-SC and Introduction to VSB

In this lecture, we have solved the questions related to the Amplitude Modulation.

Questions on Amplitude Modulation (Part 1)

In this lecture, questions on Amplitude Modulation have been solved.

Questions on Amplitude Modulation (Part-II)

In this lecture, we have solved questions related to the Amplitude Modulation

Questions on Amplitude Modulation (Part-III)

This lecture discusses about the Frequency Division Multiplexing (FDM) and the design of FDM Transmitter and Receiver has been discussed.

Frequency Division Multiplexing

This lecture gives an introduction about the angle modulation. Also, general expression for a FM Modulated signal has been derived.

Frequency Modulation

This lecture covers the analysis of Frequency Modulation for a single tone message signal and also covers the Narrow Band Frequency Modulation in detail.

Narrow Band Frequency Modulation

This lecture carries out the discussion on Wide Band Frequency Modulation. General Expression and Frequency Spectrum of Wide Band Frequency Modulation has been derived.

Wide Band Frequency Modulation

In this lecture, we have carried out the analysis of Wide Band Frequency Modulation and computed the power and bandwidth of the signal.

Analysis of Wide Band Frequency Modulation

In this lecture, problems related to Frequency Modulation has been solved.

Questions on Frequency Modulation (Part I)

In this lecture, questions related to Frequency Modulation have been solved.

Questions on Frequency Modulation (Part II)

This lecture covers the various methods for generation of Frequency Modulated Signal. Here, we have discussed the Direct Method and Indirect Method (Armstrong Method) for the generation of Frequency Modulated Signal.

Generation of FM Signal

In this lecture, we have covered the Ratio Detector Method for demodulation of FM signal. We have also solved practice problem on the Armstrong Method of FM Generation.

Armstrong Method and Demodulation of FM Signal

This lecture covers the Balanced Slope Detector technique for demodulation of FM Signal. Also, a brief introduction to PLL Method has been given.

Demodulation of FM : Balanced Slope Detector and PLL Method

In this lecture, we have carried out the mathematical analysis of the PLL Method for demodulation of the FM Signal and derived the expression for the output signal.

Demodulation of FM: PLL Method (Mathematical Analysis)

In this lecture, we have derived the general expression of the Phase Modulated Signal. We also analysed it for a single tone message signal and learnt about the relation between the Frequency and Phase Modulated Signal.

Introduction to Phase Modulation

In this lecture, we have solved questions on Phase Modulation covering all the related important concepts and formulas.

Questions on Phase Modulation

This lecture gives a brief introduction about the receivers in an Analog Communication System and also covers various important characteristics of the receivers like  Selectivity, Sensitivity and Fidelity.

Introduction to Receivers

This lecture covers the operation and drawbacks of Tuned Radio Frequency Receiver in detail.

Tuned Radio Frequency Receiver

This lecture covers the operation of Super Heterodyne Receiver and how it helps in overcoming the drawback of Tuned Radio Frequency Receiver.

Super Heterodyne Receiver

In this lecture, we have discussed about why the local oscillator frequency is kept greater than the carrier frequency in the Suoerheterodyne Receiver. Also, the concept of Image Frequency has also been covered.

Image Frequency (Super Heterodyne Receiver)

This lecture talks about the methods that can be used to supress the image frequency.

Suppression of Image Frequency (Super Heterodyne Receiver)

In this lecture, we have discussed about the Pre-Emphasis and De-Emphasis Circuits and why these circuits are required in the Frequency Modulated Systems.

Pre-Emphasis and De-Emphasis

Vishal Soni

In this course various parameters of random variable and their relation with probability will be discussed .
This topic is important for GATE and ESE aspirants of E and T branch.

Probability and Random Variable

I am an E&Tc Engineer, technical freelancer, I like to teach, write, explore new places. 

Vinod Singh Jadon

This course covers Random variabes one of the important topics of communication systems in electronics engineering curriculum and for  various engineering competitive exams as well.

Random Variables

I did my B.Tech in ece from NIT Bhopal.I am interested to share my knowledge so that it can be useful for others.

Kesava Govindu

In this course, Kesava will discuss Amplitude Modulation. This course will cover modulation index, generation of amplitude modulation, demodulation and other topics. This course targets GATE aspirants.

Amplitude Modulation for GATE Exam

Anmol is a passionate teacher and researcher. He is graduated from IIT Kanpur and having 7+ years of teaching experience.

Anmol Jain

This course is a 4 hours course which summarizes all concepts,tricks and important question for gate examination.

Crash Course on Amplitude Modulation : GATE

B.E. ECE, GATE qualified. 
I'm making videos as I learn, the little thing that I do for myself and aspirants like me.



Abirami S

In this course educator will discuss about
Important concepts in angle modulation is covered along with previous year GATE problems

Angle Modulation (Quick Revision and Solved Problems) - GATE (ECE)

Sakshi Tripathi

This course is on Digital Passband Modulation. It consists of Binary Modulation Techniques. This course will be beneficial for GATE aspirants.

Lessons

47 lessons • 8h 33m