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Lesson-1 Basics of Communication systems
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Communication systems basics,need for modulation and types of modulation is covered.

Anukriti Lee
MTECH V.L.S.I from Indira Gandhi Delhi Technical University, Delhi. Gate 2019 Qualified in ECE Passionate optimist and Circuits lover

U
Unacademy user
SK
I WANT TO CLEAR NET EXAM PLZ GIVE SOME GUIDANCE.
BK
its good madam, may I get hard copy of this lecture
Great introduction Anukriti
  1. Welcome to Unacademy COMMUNICATION SYSTEMS By Anukriti


  2. COMMUNICATION SYSTEMS 10-15 Marks in GATE ANALOG COMMUNICATIONS DIGITAL COMMUNICATIONS INFORMATION THEORY


  3. LESSON PLAN Introduction to Communication Block diagram of communication systems Modulation and its need Types of modulation Amplitude,frequency and phase Modulation.


  4. hatis Communication? Communication is a process of transmission of information from source to destination. Communication systems are employed having atleast 5 blocks These are Source, Transmitter,Channel Reciever and the Destination


  5. Communication Svstem Received -Channel- Receiver Signal Messagel Transmitted User of Transmitter Source Signal Message Information Signal Signal 1 Noise


  6. TYPES OF CHANNEL Coaxial Cable Twisted-pair Parallel-wire What kind of Channel? Purpose of communication systemm


  7. MODULATION? TO REGULATE Why do we need to modulate our signal? Transmission of our signal to very large distances.


  8. NEED OF MODULATION? There are 2 main reasons. Increment of our low frequency message signal to high frequency message signal. Reduction of Antenna height.


  9. ow is frequency related to ntenna and its height? Height of Antenna and frequency of message signal is inversely proportional to each other.


  10. Types of Modulation Amplitude Modulation Frequency Modulation Phase modulation A 3 = Arcos(wt+0