Analog Communication Systems detailed Syllabus for Electronics & Communication Engineering (DECE), C18 curriculum has been taken from the TSSBTET official website and presented for the diploma students. For Course Code, Course Name, Lectures, Tutorial, Practical/Drawing, Internal Marks, Max Marks, Total Marks, Min Marks and other information, do visit full semester subjects post given below.
For all other Diploma in Electronics & Communication Engineering (DECE) Syllabus for 3rd Sem C18 Curriculum TSSBTET, do visit Diploma in Electronics & Communication Engineering (DECE) Syllabus for 3rd Sem C18 Curriculum TSSBTET Subjects. The detailed Syllabus for analog communication systems is as follows.
Rationale:
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Prerequisites:
This course requires the basic knowledge of physical sciences at Secondary school level.
Course Outcome:
- Interpret the terminologies of Communication systems.
- Compare AM ,FM and PM Communication systems.
- Analyze working of AM and FM Radio transmitters and receivers.
- Electromagnetic wave propagation concepts.
- Working principles of various Antennas used in Electronic communication.
- Problems related to parameters of Analog communication .
Unit 1
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Unit 2
Analog Modulation Techniques Time-domain equation for an AM signal- modulation index of an AM signal- frequency spectrum of an AM signal- effects of over modulation- bandwidth of an AM signal- relation between total power and carrier power in AM-Solve simple problems- need for DSBSC and SSB modulation- advantages and disadvantages of SSB- applications of SSB- Vestigial side band transmission-Angle modulationtypes of angle modulation- time domain equation for FM signal-modulation index of an FM signalnoise triangle in FM-Comparison of AM , FM and PM- narrow band and wide band FM- preemphasis and de-emphasis- need for pre-emphasis and de-emphasis in FM.
Unit 3
Transmitters and Receivers. Requirements and specifications of transmitters- block diagram for high level modulated transmitter -low level modulated Transmitter -Distinguish between low level and high level modulation- block diagram of basic SSB transmitter – block diagram of indirect FM transmitter (Armstrong method)-block diagram of TRF receiver – limitations of TRF Receiver- need for super heterodyning in radio receiver- working of super heterodyne receiver – block diagram- choice of IF- sensitivity, selectivity and fidelity, image rejection ratio- AVC (AGC)-Explain the process of demodulation in AM receivers- block diagram of FM receiver – Foster-seeley discriminator.
Unit 4
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Unit 5
Antennas Principle of an antenna- radiation pattern- isotropic antenna – radiation pattern- elementary doublethalf wave dipole and give its radiation pattern- power gain, directivity, beam width, radiation resistance- and front to back ratio of an antenna- antenna impedance and polarization- concept of grounding- need for folded dipole- antenna array- operation of broadside and end fire arrays- resonant and non-resonant antennas – construction and working of Rhombic antenna- working of Yagi-Uda antenna- turnstile antenna- binomial array- principle of parabolic reflector- different feed arrangements- working of Horn and Loop antennas- Helical and Log periodic antenna – applications of dish antenna-antennas used for mobile comm.. and DTH.
Unit 6
Engineering Applications. Problems based on noise, S/N ratio, noise figure, noise temperature, carrier power and total power, bandwidth, modulation index in AM, bandwidth, modulation index in FM , Image Rejection Ratio, power density and electric field intensity at antennas , MUF, Critical frequency in ionosphere propagation, fading- methods of diversity to reduce fading effects, power gain , front to back ratio , design of yagi -uda, loop, helical and dish antennas.
Reference Books:
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Specific Learning Outcomes
On completion of the study of the subject a student should be able to comprehend the following:
Understand Basics of Communication Systems.
- Describe the basic elements of a communication system with block diagram.
- Explain frequency spectrum and mention the usage of frequencies for different applications.
- Define modulation.
- State the need for modulation in communication systems.
- Define amplitude modulation.
- Draw the wave form of an AM wave.
- Define Frequency modulation.
- Draw the waveform of FM Wave.
- Define phase modulation.
- Distinguish between baseband, carrier, and modulated signals and give examples.
- Explain the relationship between channel bandwidth, baseband bandwidth and transmission time.
- List causes of distortion in transmission and measures for distortion less transmission.
- Explain the terms time domain and frequency domain.
- Classify different types of noise.
- Distinguish between internal and external Noise.
- Define signal to noise ratio, noise figure and noise temperature.
Understand the Principles of Analogue Modulation Techniques
- Derive the time-domain equation for an AM signal.
- Define the modulation index of an AM signal.
- Draw the frequency spectrum of an AM signal.
- Describe the effects of over modulation.
- Calculate the bandwidth of an AM signal.
- Derive the relation between total power and carrier power in AM.
- Explain the need for DSBSC and SSB modulation.
- List the advantages and disadvantages of SSB.
- List applications of SSB.
- Explain vestigial side band transmission.
- Mention the application of vestigial side band transmission (VSB).
- State the need for angle modulation.
- List two types of angle modulation.
- Derive the time domain equation for FM signal.
- Define the modulation index of an FM signal.
- Discuss noise triangle in FM.
- Compare AM , FM and PM.
- Explain narrow band and wide band FM.
- Define pre-emphasis and de-emphasis.
- Explain the need for pre-emphasis and de-emphasis in FM.
Understand the Working of Transmitters and Receivers.
- List the requirements and specifications of transmitters.
- Draw the block diagram for high level modulated transmitter and explain
- Draw the low level modulated Transmitter and explain.
- Distinguish between low level and high level modulation.
- Draw the block diagram of basic SSB transmitter.
- Explain the function of each block.
- Draw the block diagram of indirect FM transmitter (Armstrong method& PLL method).
- Explain the function of each block.
- Draw the block diagram of TRF receiver
- Explain the function of each block.
- State the limitations of TRF Receiver.
- Explain the need for super heterodyning in radio receiver.
- Explain the working of super heterodyne AM receiver with a block diagram.
- Explain the choice of IF.
- Define sensitivity, selectivity and fidelity, image rejection ratio.
- Explain the need for AVC (AGC).
- Explain the process of demodulation in AM receivers.
- Draw the block diagram of FM receiver.
- Explain the function of each block.
- Explain Foster-Seeley discriminator (FM demodulator).
Understand the Methods of Wave Propagation
- Explain the properties of electromagnetic waves (Absorption, attenuation)
- Define power density and electric field intensity
- Calculate power density and electric field intensity for waves propagating in free space.
- Define polarization of EM waves
- Explain vertical and horizontal polarization.
- Define the characteristic impedance of free space.
- Explain reflection, refraction, diffraction, and interference of EM waves.
- List 4 types of wave propagation methods
- Explain ground wave propagation
- Explain sky wave propagation.
- Explain different layers in ionosphere.
- Define the terms critical frequency, MUF, skip distance and virtual height in sky wave propagation.
- Explain space wave propagation.
- Define the term line of sight .
- Give the expression for LOS.
- Explain the methods of diversity to reduce fading effects
- Explain duct propagation.
- Explain troposphere scatter propagation.
Understand the Working Principle of Antennas
- Explain the principle of an antenna.
- Define radiation pattern.
- Define isotropic antenna and draw its radiation pattern.
- Explain an elementary doublet.
- Explain half wave dipole and give its radiation pattern.
- Define the terms power gain, directivity, beam width, radiation resistance and front to back ratio of an antenna.
- Explain the terms antenna impedance and polarization.
- State the need for folded dipole.
- State the need of antenna array.
- Explain the operation of broadside and end fire arrays.
- Explain the working of Rhombic antenna.
- Explain the working of Yagi-Uda antenna.
- Explain turnstile antenna.
- Mention the application of turnstile antenna.
- State the need for binomial array.
- Explain the principle of parabolic reflector.
- Explain different feed arrangements.
- Explain the working of Horn and Loop antennas
- Explain the working of Helical antenna .
- Explain the principle of working of mobile antenna.
- Explain the principle of working of DTH antenna.
- List the applications of dish antenna.
Engineering Applications.
- Simple problems relating to noise, signal to noise ratio, noise figure and noise temperature.
- Simple problems on total power and carrier power in AM systems.
- Simple problems on AM equation and bandwidth of AM systems.
- Simple problems on FM equation and bandwidth of FM systems.
- Problems on Image frequency, Image Rejection Ratio of receivers.
- Problems on power density and electric field intensity of electromagnetic waves.
- Problems on MUF, Critical frequency in ionospheric propagation of EM waves.
- Problems on power gain , front to back ratio in antennas
- Design of yagi-uda antenna for a given TV channel.
- Design of a Loop antenna and list its applications.
- Design a helical antenna and list its applications.
- Design a parabolic antenna.
Suggested Student Activities
- Student visits Library to refer to wireless communication systems.
- Student inspects the available equipment in the Lab to identify transmitters and receivers.
- Visit near by radio stations to familiarize with transmitters characteristics.
- Prepare a document on different antennas and tabulate the specific details of each / datasheets/ application.
- Demonstrate Amplitude modulation and demodulation.
- Demonstrate Frequency modulation and demodulation.
- Demonstrate / presentation / simulation how Radio works.
- Prepare/collect animation video of wave propagation and fundamentals of Electromagnetic Waves and give presentation on it.
- List different wave propagations and give presentation on it.
- Quiz.
- Group discussion.
- Surprise test.
Execution Note:
- Maximum of 3 students in each batch for student activity
- Any 3 activities (either from the list given or any similar activities) shall be assigned among Different batches; may be assigned by the teacher based on interest of the students.
- Project activities shall be carried out throughout the semester and present the project report at the end of the semester; concerned teacher is expected to observe and record the progress of students activities.
- Submit qualitative hand-written report not exceeding 5 pages; one report per batch
- Each of the activity can be carried out off-class well in advance; however, Demonstration / presentation should be done during laboratory sessions.
- Assessment shall be based on quality of work as prescribed by the following rubrics table
Suggested E-Learning references
- http://electrical4u.com/
- www.electronics-tutorials.ws
- www.nptel.ac.in
For detail Syllabus of all other subjects of Electronics & Communication Engineering, C18 curriculum do visit Diploma In Electronics & Communication Engineering 3rd Sem Syllabus for C18 curriculum.
For all Electronics & Communication Engineering results, visit TSSBTET DECE all semester results direct links.