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Analog Communication System Notes (AC)

Analog Communication System Notes

B.tech Analog Communication System Notes download links are below

Complete Notes – Download Link



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.

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

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  • UNIT III SSB MODULATION : Analog Communication System 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 side band 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 System Notes

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

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  • UNIT V ANGLE MODULATION METHODS : Analog Communication System Notes

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 System 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 : Analog Communication System Notes

Radio Receiver – Receiver Types – Tuned radio frequency receiver, Superhetrodyne 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 : Analog Communication System Notes

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.Click here to check all the JNTU Syllabus books 



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