All Materials regarding to B.tech R-20 in Electronics and communication Engineering with unit wise for Every Subjects are available.
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| ECE 3-1 DC | ||
|---|---|---|
| S.No | Chapters / Units | Download Link |
| 1 | Unit 1 | Download |
| 2 | Unit 2 | Download |
| 3 | Unit 3 | Download |
| 4 | Unit 4 | Download |
| 5 | Unit 5 | Download / Part B |
ECE 3-1 DC Important Topics Questions
UNIT I:
PULSE DIGITAL MODULATION: Elements of digital communication systems, advantages
of digital communication systems, Elements of PCM: Sampling, Quantization & Coding,
Quantization error, Companding in PCM systems. Differential PCM systems (DPCM), Delta
modulation, its draw backs, adaptive delta modulation, comparison of PCM and DM systems,
noise in PCM and DM systems
UNIT II:
DIGITALMODULATIONTECHNIQUES:Introduction,ASK,FSK,PSK,DPSK,DEPSK,QPS
K,M-aryPSK,ASK,FSK,similarityofBFSKandBPSK.
UNIT III:
DATA TRANSMISSION: Base band signal receiver, probability of error, the optimum filter,
matched filter, probability of error using matched filter,coherentreception,non-
coherentdetectionofFSK,calculationoferrorprobabilityofASK,BPSK,BFSK,QPSK.
UNIT IV:
INFORMATION THEORY: Discrete messages, concept of amount of information and its
properties. Average information, Entropy and its properties, Information rate, Mutual
information and its properties
SOURCECODING:Introductions,Advantages,Shannon’stheorem,Shanon-
Fanocoding,Huffman coding, efficiency calculations, channel capacity of discrete and analog
Channels, capacity of a Gaussian channel, bandwidth–S/N trade off.
UNIT V:
LINEAR BLOCKCODES: Introduction, Matrix description of Linear Block codes, Error
detection and error correction capabilities of Linear block codes, Hamming codes, Binary
cyclic codes, Algebraic structure, encoding, syndrome calculation, BCH Codes.
CONVOLUTIONCODES: Introduction, encoding of convolution codes, time domain
approach, transform domain approach. Graphical approach: state, tree and trellisdiagramde
coding using Viterbi algorithm.
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