I am an electronics engineer | 3 yrs teaching experience

Deepak Poonia

In this course, Deepak will cover the complete syllabus of analog communication for GATE examination. He will also discuss the previous year GATE questions of this subject.
A list of topics covered in this course -
1. Basic analog communication system
2. Modulation and need for modulation
3. Amplitude modulation
4. Angle modulation
5. Demodulation systems
6. Superheterodyne receiver
7. Signal to noise ratio calculations for AM and FM

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 - Iconic Pro

English

Analog Communication System

Amplitude Modulation

Communications

GATE & ESE - EE, EC

GATE, ESE and IIT-JAM

Ace the toughest competitive and government exams in India 

Test Preparation

This lesson gives you an overview of the course and brief you about the topics to be covered in upcoming lessons. Target audience for the course is also mentioned in the lesson.

Overview: Analog Communication System

In this lesson, Deepak has explained type of communication systems possible. He has also discussed about wired communication system and the use of each component of the system.

Basic Communication System

In this lesson, Deepak has explained the concept of modulation and reason for doing modulation. He has also discussed about other benefits of modulation in a communication system.

Need of Modulation

In this lesson, Deepak has explained about multipexing of signals and the need for it. He has also discussed the reason of interference even after using multiplexing.

Multiplexing

In this lesson, Deepak has given a brief introduction of Fourier transform and performed Fourier transform for a particular input signal.

Fourier transform

In this lesson , Deepak has explained about band limiting process and how this process can be used to transmit more number of signals through a given channel.

Band limiting process

In this lesson, Deepak has done mathematical analysis of modulation technique. He has also discussed few properties of Fourier transform.

Mathematical analysis of Modulation

In this lesson, Deepak has explained about channel and it's functions. He has also discussed about distorted transmission and distortionless transmission.

Channel

In this lesson, Deepak has explained about the conditions of a  distortionless transmission and how it won't affect the content of a message signal.

Distortionless transmission

In this lesson, Deepak has explained about the process of equalisation and how it can be used to create a distortionless transmission.

Equalisation

In this lesson, Deepak has explained about non-linear distortion and how it is different from linear distortion.

Non-linear distortion

In this lesson, Deepak has explained different reasons for interference even while using different frequencies for different transmissions.

Reasons for interference

In this lesson , Deepak has explained about carrier and need for it in communication system. He has also given a brief introduction of different type of modulations.

Types of modulation

In this lesson, Deepak has explained about the concept of amplitude modulation and also provided the mathematical expression for it.

Amplitude modulation

In this lesson , Deepak has explained about singletone modulation and multitone modulation and how one can differentiate between them.

Singletone and multitone modulation

In this lesson, Deepak has explained about power distribution in amplitude modulated signal and the share of carrier power and sideband power in the total power of the signal.

Power distribution in AM signal

In this lesson , Deepak has explained about a new term called modulation efficiency and how we can use it to find the share of sideband power in the total power of the signal.

Modulation efficiency

In this lesson, Deepak has solved  few questions on the topics covered in the course till now.

Questions on power of AM signal

In this lesson, Deepak has explained about multitone amplitude modulation and generated the frequency spectrum for it. He has also the mathematical formulas for Amax and Amin.

Multitone amplitude modulation

In this lesson, Deepak has derived the formulas for power distribution in multitone amplitude modulated signal and also solved a nurmerical on it.

Power distribution in multitone AM signal

In this lesson, Deepak has explained the concept of under , critical and over modulation. He has also discussed the demodulation techniques for each of them.

Under , Critical and Over Modulation

In this lesson, Deepak has explained the method for generation of AM signal using square law modulator.

Generation of AM signal

In this lesson , Deepak has explained about square law demodulator method for demodulating the AM signal.

Demodulation

In this lesson, Deepak has explained one more demodulation technique named as envelope detector and conditions for using it.

Envelope detector

In this lesson , Deepak has explained about synchronous detector demodulation technique. He has also discussed the advantages and disadvantages of amplitude modulation.

Synchronous detector

In this lesson , Deepak has explained about double sideband suppressed carrier signal and has compared it with amplitude modulated signal.

Double sideband supperessed carrier

In this lesson, Deepak has explained about power distribution in double sideband suppressed carrier signal. He has also calculated the value for power efficiency in DSB-SC signal.

Power distribution in DSB-SC signal

In this lesson , Deepak has explained different methods for generation of DSB-SC signals.

Generation of DSB-SC signal

In this lesson , Deepak has explained the demodulation technique used for DSB-SC signal. He has also mentioned the advantages and disadvantages of DSB-SC signal.

Demodulation of DSB-SC signal

In this lesson , Deepak has explained the concept of single sideband suppressed carrier. He has also done a comparison between AM, DSB-SC and SSB-SC transmitter power values.

Single sideband suppressed carrier

In this lesson , Deepak has explained about singletone modulation for SSB-SC signal.

Singletone SSB-SC

In this lesson , Deepak has explained two methods for generating SSB-SC signals. He has also discussed the possibility of transmitting voice signal using SSB-SC modulation technique.

Generation of SSB-SC

In this lesson, Deepak has explained the demodulation technique for SSB-SC modulated signal. He has also given the advantages and disadvantages of SSB-SC modulation technique.

Demodulation of SSB-SC

In this lesson , Deepak has a brief introduction of vestigial sideband modulation technique. He has also explained the issues that will occur when we try to send a video signal using SSB-SC modulation technique.

Vestigial sideband (part-1)

In this lesson , Deepak has explained about vestigial sideband modulation technique in depth. He has also discussed the bandwidth requirement and power for a vestigial sideband signal.

Vestigial sideband (part-2)

In this lesson , Deepak has explained about frequency division multiplexing technique. He has also discussed the role of guard band in multiplexing.

Frequency division multiplexing

In this lesson , Deepak has provided the solution for some previously asked questions.

Solved problems (part-1)

In this lesson, Deepak has provided solutions for some previously asked questions.

Solved problems (part-2)

In this lesson , Deepak has explained about phase modulation and frequency modulation.

Angle modulation

In this lesson, Deepak has explained about frequency modulation in depth. He has also derived the formula for modulation index of FM.

Frequency modulation

In this lesson, Deepak has given few last minute tips that can help the gate aspirants in improving their efficiency during the examination.

Last minute tips for GATE (ECE)

In this lesson, Deepak has derived the expression for singletone  narrowband FM signal and compared it with the expression of AM signal. He has also derived the formula for total power of NBFM signal.

Narrowband FM

In this lesson, Deepak has derived the expression for wideband FM signal in terms of Bessel function. He has also discussed some properties of Bessel function.

Wideband FM

In this lesson, Deepak has done the spectrum analysis of WBFM signal. He has also derived the formula for the bandwidth of WBFM.

Carson's rule

In this lesson, Deepak has compared the bandwidth requirements for AM,NBFM and WBFM signals.

Comparison of FM and AM

In this lesson, Deepak has explained the concept of generation of FM signal using direct method.

Generation of FM (Direct method)

In this lesson, Deepak has explained the concept for generation of FM signal using indirect method.

Generation of FM (Indirect method)

In this lesson, Deepak has explained the concept for generation of FM using Armstrong method and how he overcome the problem of indirect method.

Generation of FM (Armstrong method)

In this lesson, Deepak has solved few previously asked GATE questions on frequency modulation.

Previous year GATE questions on FM

In this lesson, Deepak has solved few previously asked GATE questions on amplitude modulation.

Previous year GATE questions on AM

In this lesson, Deepak has solved few previously asked GATE questions on DSB-SC,AM and FM.

Previous year GATE questions (Part-1)

In this lesson, Deepak has solved few previously asked GATE questions on AM, DSB-SC, SSB,  VSB and FM

Previous year GATE questions (Part-2)

In this lesson, Deepak has solved few previously asked GATE questions on AM, DSB-SC, SSB, VSB and FM.

Previous year GATE questions (Part-3)

Previous year GATE questions (Part-4)

In this lesson, Deepak has solved few previously asked GATE questions on AM, DSB-SC, SSB, VSB and FM

Previous year GATE questions (Part-5)

In this lesson, Deepak has solved the questions asked in GATE-2018 from the topics that have been covered in this course.

GATE-2018 Questions

In this lesson, Deepak has discussed the advantages and disadvantages of indirect method of FM generation over direct method.

Advantages and disadvantages of Indirect method

In this lesson,Deepak has explained the demodulation of FM signal using frequency discriminator.

Demodulation of FM

In this lesson, Deepak has explained the advantage of using a limiter at the input of frequency discriminator.

Frequency discriminator

In this lesson, Deepak has given an introduction of phase locked loop.

Phase locked loop (part-1)

In this lesson, Deepak has realized the phase detector component of PLL using a multiplier and a low pass filter.

Phase locked loop (part-2)

In this lesson, Deepak has explained the process of achieving lock mode in PLL

Phase locked loop (part-3)

In this lesson, Deepak has explained that how can we achieve  zero steady state frequency error.

Phase locked loop (part-4)

In this lesson, Deepak has explained the importance of loop gain in achieving better performance from PLL.

Phase locked loop (part-5)

In this lesson, Deepak has explained about the loop filter and how it helped in achieving the steady state phase error to zero.

Phase locked loop (part-6)

In this lesson, Deepak has simplified the concept of PLL. He has also explained the free running state, lock state and capture state of PLL. He has also discussed the objective questions that can be asked from this topic.

Phase Locked Loop (Simplified)

In this lesson, Deepak has mathematical explained that how a PLL circuit achieves lock state.

PLL ( mathematical analysis to achieve lock state)

In this lesson , Deepak has mathematical explained that how a PLL circuit can attain capture state and after going into capture state how we get the demodulated output.

PLL (mathematical analysis to achieve capture state)

In this lesson, Deepak has explained phase modulation by comparing it with frequency modulation. He has also derived the formula for modulation index of PM

Comparison between frequency modulation and phase modulation

In this lesson, Deepak has explained the method for generation of phase modulated signal using frequency modulator and vice versa.

Generation of PM and FM

In this lesson, Deepak has derived the formulas for maximum frequency deviation in a phase modulated signal and maximum phase deviation in a frequency modulated signal.He has also discussed the method for solving questions on this topic.

Formulas for frequency and phase deviation

In this lesson, Deepak has solved some previously asked questions on finding the maximum frequency and phase deviation values for an angle modulated signal.

Questions on frequency and phase deviation

In this lesson, Deepak has given an introduction to receivers and also explained the parameters necessary to understand the functioning of receivers.

Introduction to receivers

In this lesson, Deepak has explained the working of tuned radio frequency receivers and also discussed the drawbacks of these type of receivers.

Tuned radio frequency receiver

In this lesson, Deepak has explained the working of superheterodyne receivers.

Superheterodyne receiver

In this lesson, Deepak has explained the concept of image frequency and the method to suppress them.

Image frequency rejection

In this lesson, Deepak has explained the biggest drawback of envelope detector i.e. capture effect.

Capture effect in envelope detector

In this lesson, Deepak has explained the reason for using pre-emphasis and De-emphasis filters.

Pre-emphasis and De-emphasis (Part-1)

In this lesson, Deepak has explained that how pre-emphasis and De-emphasis filters help in improving the SNR at higher frequencies.

Pre-emphasis and De-emphasis (Part-2)

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

A Chartered Electronics & Communication Engineer, pursuing Master's in Technology;
also inclined towards Reading and Writing. A Human Rights

Akshita Pal

In the following lessons, Akshita brings together some key formulae and equations from the sections of Analog & Digital Communication, that are important from the point of view of preparations of Technical Exams. like G.A.T.E and PSUs etc. 
Hope, the course benefits the aspirants... Good Luck!! :)

(Hindi) Important Formulae In Communication for GATE

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

79 lessons • 13h 54m

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Overview: Analog Communication System

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Basic Communication System

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Need of Modulation

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Multiplexing

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Fourier transform

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Band limiting process

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Mathematical analysis of Modulation

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Channel

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Distortionless transmission

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Equalisation

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