(A.com)Analog Communications Class Lecture Notes JNTUK Syllabus

(A.com)Analog Communications Class Lecture Notes JNTUK Syllabus:

(A.com)Analog Communications Class Lecture Notes JNTUK Syllabus

Unit 1:  Introduction

Syllabus

Introduction : Introduction to communication system, Need for modulation,Frequency division multiplexing, Amplitude modulation, Definition, Time domain and frequency domain description, Single tone modulation, Power relations in AM waves,Generation of AM waves, Square law modulator, Switching modulator, Detection of AM waves :Square law detector, Envelope detector.

Contents

1.1 Introduction to Communication System

1.2 Need for Modulation

1.3 Types of Modulations

1.4 Frequency Division Multiplexing

1.5 Amplitude Modulation

1.6 Power Relations in AM Waves

1.7 Effective Voltage and Current for Sinusoidal AM

1.8 Modulation by Several Sine Waves

1.9 Generation of AM Waves

1.10 Detection of AM Waves

Unit 2:  DSB Modulation

Syllabus

DSB modulation : Double side band suppressed carrier modulators, Time domain and frequency domain description, Generation of DSBSC waves, Balanced modulators, Ring modulator, Coherent detection of DSB-SC modulated waves, COSTAS loop.

Contents

2.1 Introduction

2.2 Time Domain Description

2.3 Frequency Domain Description

2.4 Generation of DSBSC Wave

2.5 Coherent Detection of DSBSC Modulated Wave

2.6 Costas Loop

Unit 3 :  SSB Modulation

Syllabus

SSB Modulation: Frequency domain descript, Frequency discrimination method for
generation of AM SSB modulated wave ,ime domain description,Phase discrimination method for generating AM SSB modulated wave,Demodulation of SSB waves, Vestigial side band  modulation : Frequency description, Generation of VSB modulated waves. Time domain description, Envelope detection of a VSB wave pulse carrier, Comparison of  techniques, Applications of different  AM systems.

Contents

3.1 Introduction

3.2 Frequency Domain Description

3.3 Frequency Discrimination Method for Generating SSB Modulated Wave

3.4 Time Domain Description

3.5 Single Tone SSB Modulation

3.6 SSB Modulation by Phase Shift

3.7 Third Method for Generating SSB Modulated Wave

3.8 Comparison between SSB Generation Methods

3.9 Demodulation of SSB Waves

3.10 Vestigial Side band Modulation

3.11 Comparison of Amplitude Modulation Techniques

Unit 4 :  Angle Modulation

Syllabus

Basicconcepts, Frequency modulation : Single tone frequency modulation, Spectrum analysis of Sinusoidal FM wave, Narrow band FM, Wide band FM, Constant average power, Transmission band width of FM wave-Generation of FM waves, Direct FM, Detection of FM waves : Balanced frequency discriminator, Zero crossing, phase locked loop, comparison of FM and AM.

Contents

4.1 Background

4.2 Angle Modulation - Basic Concept.

4.3 Frequency Modulation

4.4 Narrow Band Frequency Modulation

4.5 Wide Band Frequency Modulation

4.6 Transmission Bandwidth of FM Wave

4.7 Constant Average Power

4.8 Generation of FM Waves

4.9 Detection of FM Waves

4.10 Phase Locked Loop (PLL)

4.11 Comparison of FM and AM Systems

4.12 Comparison of FM and PM Systems

Unit 5 :  Noise

Syllabus

Noise : Noise in analog communication system,Noise in DSB and SSB systems,Noise in AM system, Noise in angle modulation system, Threshold effect in angle modulation system, Pre-emphasis  and de-emphasis.
 

Contents     

5.1 Noise in Analog Communication Systems

5.2 Noise in DSBSC Receivers

5.3 Noise in SSB Systems

5.4 Noise in AM System

5.5 Noise in Angle Modulation System

5.6 Pre-emphasis and De-emphasis

Unit 6 : Transmitters

Syllabus

Transmitters :Radio transmitter - classification of transmitter, AM transmitter, Effect of feedback on performance of AM transmitter, FM transmitter- variable reactance type and phase modulated FM transmitter, Frequency stability in FM transmitter.

Contents

6.1 Introduction

6.2 Transmitter Basic

6.3 AM Transmitters

6.4 Effect of Feedback on Performance of AM Transmitter

6.5 AM Broadcast Transmitters

6.6 FM Transmitters

6.7 FM Stereo Transmitter

Unit 7 :  Receivers

Syllabus

Receivers : Radio receiver - Receiver types - Tuned radio frequency receiver, Superheterodyne raceiver, RF sectionand characteristics -Frequency changing and tracking, Intermediate frequency. AGC, FM Receiver, Comparison with AM receiver, Amplitude limiting.

Contents

7.1 Introduction

7.2 Functions of Receiver

7.3 Receiver Types

7.4 Receiver Characteristics

7.5 Receiver Sections

7.6 FM Receiver

Unit 8 :  Pulse Modulation

Syllabus

Iime division multiplexing. Types of pulse modulation, PAM (Single polarity, Double polarity) PWM: Generation and demodulation of PWM, PPM, Generation and demodulation of PPM, TDM Vs PDM.

Contents

8.1 Introduction

8.2 Pulse Amplitude Modulation

8.3 Pulse Width Modulation (PWM)

8.4 Pulse Position Modulation (PPM)

8.5 Comparison of PAM, PWM and PPM Systems

8.6 Time Division Multiplexing