Digital Communication Premium Lecture Notes, Prepared by Kavi. Specially for Electronics and Communication Engineering. Syllabus Covered based on Anna University B.E Electronics and Communication Engineering
Content:
UNIT-1 DIGITAL COMMUNICATION SYSTEM (Pages: 32)
UNIT-2 BASEBAND FORMATTING TECHNIQUES (Pages: 18)
UNIT-3 BASE BAND CODING TECHNIQUES(Pages: 14)
UNIT-4 BASE BAND RECEPTION TECHNIQUES(Pages: 16)
UNIT-5 BAND PASS SIGNAL TRANSMISSION AND RECEPTION(Pages: 11)
Attachment: click hereUNIT-1
DIGITAL COMMUNICATION SYSTEM
Communication
Elements of communication system
Block diagram of communication system
1. Information source
2. Input transducers
3. Transmitter
4. Channel and the noise
5. Receiver
6. Destination
Band width
Frequency spectrum
Sources of information
Signals
1. One dimensional signal
2. Two dimensional signal
3. Three dimensional signal
4. Four dimensional signal
Introduction to analog pulse communication system
1. Analog communication
2. Digital communication
Classification of modulation
1. Analog modulation
2. Digital modulation
Digital communication system
Channel classification
Communication channel
1. Telephone channel
2. Coaxial cable
3. Optical fiber cables
4. Wireless broadcast channels
5. Mobile radio channel
6. Satellite channel
Performance measure
Geometric representation of signal
Mathematical models of communication channel
1. Additive noise channel
2. Linear filter channel
UNIT-2
BASEBAND FORMATTING TECHNIQUES
Introduction
Sampling
1. Impulse sampling
2. Natural sampling
Sampler implementation
Quantisation
1. Uniform quantisation
2. Non uniform quantisation
Encoding techniques for analog sources
Temporal waveform encoding
1. Pulse coded modulation
2. Adaptive pulse code modulation
3. Differential modulation
4. Adaptive differential pulse code modulation
5. Delta modulation
6. Adaptive delta modulation
Spectral waveform encoding
1. Sub band coding
2. Adaptive transform coding
3. Model based encoding
4. Linear predictor coding
UNIT-3
BASE BAND CODING TECHNIQUES
Error control code
Two types
1. Block code
2. Conventional codes
Block codes
1. Linear code
2. Hamming code
3. Error detection and correction capabilities of hamming code
Concept of error free communication
Classification of line code
Desirable characteristics of line code
1. DC components
2. Self synchronization
3. Error detection
4. Band width compression
5. Differential encoding
6. Noise immunity
7. Transparency
Power spectra of line codes
Error probability
UNIT-4
BASE BAND RECEPTION TECHNIQUES
Introduction
Noise in communication system
1. Quantisation of noise
2. Channel noise
3. Inter symbol interference
Receiving filter
Correlator type
Matched filter type
Equalizing filter
Implementation
Eye pattern
Detector
Error probability
Figure of merit for digital detection
UNIT-5
BAND PASS SIGNAL TRANSMISSION AND RECEPTION
Memory less modulation methods
ASK
FSK (Frequency Shift Keying)
PSK (phase Shift Keying)
QUADRATURE AMPLITUDE MODULATION
QPSK (Quadratue Phase Shift Keying)
Spectral characteristics
Band pass receiving filter
Coherent detection system
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