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Details
Communication System Full Premium Lecture Notes. Useful for Electrical as well as Electronics Engineering Students, Specially for Candidates preparing for GATE Exams.
Content :
Signal
Types of signal
1. Analog signal
2. Discrete\pulse signal
3. Digital signal
Elements of electronic communication systemFour different forms
1. Voice signal
2. Audio signal
3. Video signal
4. Data
a. Information source
b. Input transducers
c. Modulator
d. Channel
i. Guided \point to point\wired
ii. Unguided\broad casting
5. Noise
6. Demodulator
7. Output transducer
DUPLEX
Modulator
Message\modulating
Base band signal
DEMODULATION
Principle of modulation
Need for modulation
AMPLITUDE MODULATION
Frequency domain
Analysis of spectrum
Power calculation
Efficiency calculation
Current calculation
Numericals in AM
MODULATION INDEX
MODULATION FACTOR
Over modulation
Numericals in modulation index
MULTITONS AM
Modulation\Generation of AM
Nonlinear devicesDETECTION OF AM
1. Square law demodulator
2. Switching demodulator
3. Synchronous demodulatorAdvantages
Disadvantages
Diagonal clipping
Synchronous detector
Advantage of AM
Disadvantages of AM
Application of AM
Generation \modulation of DSB-SC
Balanced modulator
AM-advantage
-disadvantages
-application
SSB-RC
Time domain
Frequency domain
Power saving
Frequency discrimination
MULTIPLEXING
Frequency division multiplexing (FDM)
Application
Bandwidth calculationANGLE MODULATION
Types
1. FM
2. PMNumericals in single tone FM
Types of FM
1. NBFM
2. WBFMCARSON’S RULE
Problems
Hartely oscillatorArmstrong method
1. Frequency modulator
2. Frequency demodulator
3. Frequency multiplier
4. MixerSlope detector
Foster seelay discrimination
PHASE MODULATION
Single tone PM
RADIO RECEIVER
PARAMETERS
Selectivity
Sensitivity
FiedilityTypes of RX
1. AM radio RX
2. FM radio RXSuper heterodyne receivers
Image frequency
Amplitude limiter\ Thresholding of FM
Pre emphasis and de emphasisDIGITAL COMMUNICATION
1. Base band TX
2. Pass band TXPCM (pulse code modulation
ENCODER
Electrical representation of encoderREPEATER
DPCM (differential PCM)
DM (delta modulator)
ADM (adaptive DM)
ADM transmitter and receiver
ASK (amplitude shift keying)
NOISE
1. Internal noise
2. external noise
Thermal noise
Noise in ACM
Noise in PCM
Information (I) - Additional Information
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Additional Information
Pages 145 Author N/A - Reviews
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