Communication Engineering (4 Units) Premium Lecture Notes - Niranjan Kumar Edition

Communication Engineering (Units 1,2,3 and 4) Handwritten Premium Lecture Notes, Prepared by Lecture Niranjan Kumar and Sijo. Specially for Electrical and Electronics Engineering Candidates. Syllabus Covered based on Anna University Fifth Semester R2008 Regulation.

Content :

COMMUNICATION ENGINEERING

UNIT-1

ANALOG COMMUNICATION

Communication

Sender or transmitter

Receiver

Communication channel

AM (Amplitude Modulation)

Classification of modulation

Modulation

1. Analog modulation
2. Digital modulation

Amplitude modulation

Mathematical representation of an AM wave

AM frequency spectrum

Side bands

Phaser representation of an AM with carrier

Power relation

Carrier power

Power in the side bands

Generation of the AM –DSB

Based on the power level

Low level AM modulation

Emitter modulator

High level AM modulation

Principle of operation

Generation of AM wave using non-linear properties

Square law modulation

1. A non-linear device
2. A band pass filter
3. A carrier source andmodulating signal

Balanced modulator

DSB-SC

Modification of amplitude modulation

SSB-SC

Transmission bandwidth

Power calculation

AM transmitter

Low level modulated AM transmitted

High level modulated AM transmitted

AM receiver

Function of the receiver

1. Carrier frequency tunning
2. Filtering
3. Amplification

Receiver parameters

Selectivity

Classification of AM receiver

Tuned radio frequency

Operation

AM super heterodyne receiver

Angle modulation

Classification

1. Frequency modulation
2.  phase modulation

Representation of PM

Modulation index of PM

Deviation sensitivity

Frequency modulation

Representation of FM

Frequency deviation

Modulation index

Deviation ratio

Percentage modulation of FM wave

Types of frequency modulation

Narrow band FM

Principle of operation

Wide band FM

Generaton of FM

Direct method

Indirect method

Reactance tube modulation

Armstrong method

UNIT-2

DIGITAL COMMUNICATION

Pulse modulation

Sampling process

Sampling theorem

Types of sampling method

1. Ideal
2. Natural sampling
3. Flat topped sampling

Nyquist rate

Aliasing

Pulse ampliyude modulation

Types of PAM

1. Natural PAM
2. Falt top PAM

Generation of natural PAM

Pulse type modulation

Detection of the flat top PAM

Pulse position modulation

PPM signal demodulation

Quantization and coding

Types

1. Uniform
2. Non-uniform

Encoding

Types of line code

DPCM , DM , and ADM

Delta modulation

DM receiver

Quantization noise

Granular noise

ADM transmitter

ADM receiver

Pass band data transmission

Classification of digital modulation detection techniques

1. Coherent
2. Non-coherent

ASK generator

ASK waveform

ASK detector

FSK generation

Frequency deviation

Phase shift keying

BPSK generation

BPSK detection

QPSK receiver

Minimum shift keying

MSK transmitter

QAM

UNIT-3

SOURCE CODE , LINE CODE AND ERROR CONTROL

Primary communication

Amount of information

Principle

Units of information

Properties of information

Average information

Rate of infprmation

Discrete memoryless channels

Binary symmetric channel

Mutual information

Properties

Channel capacity

Noise free channel

Symmetric channel

Source coding

Data compensation

Prefix coding

Huffman coding

Noise less coding theorem

Shannon’s first theorem

BW-SNR trade off codes

Types of line coding

1. Polar
2. Unipolar
3. Bipolar

Error control codes

Types of code

UNIT -4

MULTIPLE ACCESS TECHNIQUES

Introduction

Duplexing

Guard bands