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AC Notes – Analog Communication System Notes Pdf Free Download

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AC Notes – Analog Communication System Notes Pdf Free Download

UNIT I – INTRODUCTION

  • Introduction to the 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.

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UNIT II – DSB MODULATION

  • Double sideband 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.
  • Radio Transmitter – Classification of transmitters, AM Transmitter Block Diagram, and explanation of each block.

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UNIT III SSB MODULATION: Analog Communication Pdf Notes

  • Frequency domain description, Frequency discrimination method for generation of AM SSB Modulated Wave, Time-domain description, Phase discrimination method for generating AM SSB Modulated waves.
  • Demodulation of SSB Waves, Vestigial sideband modulation: Frequency description, Generation of VSB Modulated wave, Time-domain description.
  • Envelope detection of a VSB Wave pulse Carrier, Comparison of AM Techniques, Applications of different AM Systems.

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UNIT – IV ANGLE MODULATION CONCEPTS: Analog Communication Pdf Notes

  • Basic concepts, Frequency Modulation: Single tone frequency modulation,
  • Spectrum Analysis of Sinusoidal FM Wave,
  • Narrowband FM, Wideband FM,
  • Constant Average Power,
  • Transmission bandwidth of FM Wave -Comparison of FM & AM.

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AC Notes – Analog Communication System Notes Pdf Free Download

UNIT V – ANGLE MODULATION METHODS

Generation of FM Waves, Direct Method, Parametric variation method, varactor diode, reactance modulator, indirect method: armstrong method.Detection of Fm waves : Balanced frequency descriminator, zero crossing detector, phased lock loop, foster seeley discriminator, ratio detector, FM transmitter block diagram and explanation of each block.

Complete unit : Not available

UNIT VI – NOISE: Analog Communication Pdf Notes

Noise in Analog communication System, Noise in DSB& SSB System Noise in AM System, Noise in Angle Modulation System, Threshold effect in Angle Modulation System, Pre-emphasis & de-emphasis

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UNIT VII – RECEIVERS

  • Radio Receiver – Receiver Types – Tuned radio frequency receiver,
  • Super hetrodyne receiver,
  • RF section and Characteristics – Frequency changing and tracking.
  • Intermediate frequency,
  • AGC,
  • FM Receiver,
  • Comparison with AM Receiver,
  • Amplitude limiting.

Complete Unit : Not available

UNIT VIII PULSE MODULATION

  • Time Divison Multiplexing, Types of Pulse modulation,
  • PAM (Single polarity, double polarity)
  • PWM: Generation & demodulation of PWM, PPM,
  • Generation and demodulation of PPM

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TEXTBOOKS :

1. Principles of Communication Systems – H Taub & D. Schilling, Gautam Sahe, TMH, 2007 3rd Edition.

2. Communication Systems – B.P. Lathi, BS Publication, 2006.

Note :- These notes are according to the r09 Syllabus book of JNTUH.In R13 ,8-units of R09 syllabus are combined into 5-units in r13 syllabus.

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