EC2311/EC6651 Communication Engineering Hand Written Lecture Notes - Lavanya Edition

  • 8August
  • 2015
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    Communication Engineering Handwritten Premium Lecture Notes, Prepared by Lavanya. Specially for Electrical and Electronics Engineering Candidates. Syllabus Covered based on Anna University Sixth Semester R2013 and R2008 Regulation.

    CONTENT:

    UNIT-1 ANALOG COMMUNICATION (Pg.no:40)
    UNIT-2 DIGITAL COMMUNICATION (Pg.no:27)
    UNIT-3 SOURCE CODES, LINE CODES AND ERROR CODE (Pg.no:47)
    UNIt-4 MULTIPLE ACCESS TECHNIQUE (Pg.no:9)
    UNIT-5 SATELLITE ORBIT, OPTICAL FIBER – POWER LINE SCALAR (Pg.no:9)

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    UNIT-1
    ANALOG COMMUNICATION
    Types of modulation system
    1. Analog modulation system
    2. Digital modulation system
    Types of electronic communication system
    1. Analog communication system
    2. Digital communication system
    Problems
    AM voltage distribution
    Voltage spectrum
    AM modulation
    1. DSBFC (Double Side Band Full Carried)
    2. DSBSC ( Double Side Band Suppressive carrier) 
    3. SSB ( Single Side Band)
    4. VSB ( Vestigial Side Band)
    Phasor representation of AM
    Generation of AM 
    1. Low level modulation
    2. High level modulation
    Types of modulators
    1. Low level AM modulator
    2. High Level AM modulator
    Power efficiency calculation
    Advantages of collector modulator
    Comparison of low and high level modulation
    Generation of non- linear property
    1. Square modulator
    2. Balanced modulator
    Switching modulator
    Angle modulation
    Advantages disadvantages
    Application
    Types of FM
    1. Narrow band FM
    2. Wide band FM
    Band width for angle modulated wave
    Generation of FM
    Methods of FM generation
    1. Direct method
    a. Reactance modulator
    b. Varactor modulator
    2. Indirect method
    a. Armstrong method

    UNIT-2
    DIGITAL COMMUNICATION
    Pulse modulation
    1. Analog PM
    2. Digital PM
    Analog modulation
    Sampling process
    Sampling method
    1. Ideal sampling
    2. Natural sampling
    3. Flat topped sampling
    Pulse time modulation
    Transmission path
    Dynamic range
    Companding
    Types of companding
    1. Analog companding
    2. Digital companding
    ADM
    DPCM
    Amplitude shift keying
    Frequency shift keying
    FSK transmitter
    QPSK transmitter

    UNIT-3
    SOURCE CODES, LINE CODES AND ERROR CODE
    Properties of information
    Average information
    Problems
    Source coding
    Huffman coding
    Shannon fano coding
    BSC
    Error control coder
    Types
    1. Block codes
    2. Conventional codes
    Problems
    BW-SNR trade codes
    Line coding
    Differential man chester
    Bipolar encoding

    UNIt-4
    MULTIPLE ACCESS TECHNIQUE
    Duplexing
    Multiplexing
    Types of multiplexing
    1. FDMA – Frequency Division Multiple Access
    2. TDMA – Time Division Multiple Access
    3. CDMA – Code Division Multiple Access
    4. SDMA – Space Division Multiple Access
    Self jamming
    Advantages
    Disadvantages
    Applications

    UNIT-5
    SATELLITE ORBIT, OPTICAL FIBER – POWER LINE SCALAR
    Satellite orbit
    Satellite height
    1. Circular orbit
    2. Elliptical orbit
    Earth station
    Multiple access techniques
    Optical fiber communication system
    Application
    Characteristics and behavior of light
    Critical angle
    Snell’s law
    Fiber optic cable
    By rating the index mode
    1. Multimode step index
    2. Single mode step index
    3. Multimode graded index

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