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ASSIGNMENT TOPICS Unit I: 1. Certain issues of digital transmission, 2. advantages of digital communication systems, 3. Bandwidth- S/N trade off, and Sampling theorem 4. PCM generation and reconstruction 5. Quantization noise, Differential PCM systems (DPCM) 6. Delta modulation, Unit II: 1. Coherent ASK detector and non-Coherent ASK detector 2. Coherent FSK detector BPSK 3. Coherent PSK detection Unit III: 1. A Base band signal receiver, 2. Different pulses and power spectrum densities 3. Probability of error 4. Conditional entropy and redundancy, 5. Shannon Fano coding 6. Mutual information, Unit IV: 1. Matrix description of linear block codes 2. Matrix description of linear block codes 3. Error detection and error correction capabilities of linear block codes 4. Encoding 5. decoding using state Tree and trellis diagrams 6. Decoding using Viterbi algorithm Unit V: 1. Use of spread spectrum 2. direct sequence spread spectrum(DSSS), 3. Code division multiple access 4. Ranging using DSSS Frequency Hopping spread spectrum,
Subject Contents 1.7. 1. Synopsis page for each period (62 pages) 1.7.2. Detailed Lecture notes containing: 1. PPTs 2. OHP slides 3. Subjective type questions (approximately 5 t0 8 in no) 4. Objective type questions (approximately 20 to 30 in no) 5. Any simulations 1.8. Course Review (By the concerned Faculty): (I)Aims (II) Sample check (III) End of the course report by the concerned faculty GUIDELINES: Distribution of periods: No. of classes required to cover JNTU syllabus : 40 No. of classes required to cover Additional topics : 4 No. of classes required to cover Assignment tests (for every 2 units 1 test) : 4 No. of classes required to cover tutorials : 8 No. of classes required to cover Mid tests : 2 No of classes required to solve University : 4 Question papers ---------------- 62 Total periods
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DC COURSE FILE
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GEETHANJALI COLLEGE OF ENGINEERING
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Convolution Codes: Encoding, decodi
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III. To inculcate positive attitude
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7. Importance of the course and how
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DC 12: Compute the power and bandwi
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10. Course mapping with PEO’s and
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13.Micro plan : Sl. no Unit No. Tot
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14.Detailed Notes UNIT 1 : Elements
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A communication system may transmit
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the wavelength is extremely long, m
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asic elements of digital communicat
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4. Channel introduced many types of
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5. Bandwidth is another scarce reso
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Pulse Code Modulation ‣ PCM gener
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77777333333333333333333333333333333
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• The most common technique for s
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Pulse Code Modulation (PCM) : • P
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Figure 3.11 Illustration of the qua
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Quantization (nonuniform quantizer)
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Time-Division Multiplexing(TDM):
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Let m n where T The error signal is
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3. Simplify receiver design Because
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Figure 3.27 Block diagram illustrat
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Adaptive Differential Pulse-Code Mo
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ASK, OOK, MASK: • The amplitude (
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Frequency Shift Keying: • One fre
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s t Acos 2f ct 3 Acos 2f
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QAM and QPR: • QAM is a combinati
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Generation and Detection of Coheren
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Figure 6.29 Signal-space diagram fo
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UNIT 3 Base Band Transmission And O
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• The tails of hI(t) decay as 1/|
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• precoding d b d k k k2 symbol 1
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h( t) N 1 n w n sin c t T b
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• Equalization : to compensate fo
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e n y n 2E en 2E en 2Eenxnk
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- Flexibility - Same H/W may be tim
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Interpretation of Eye Diagram:
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The set of source symbols is called
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We will usually neglect to mention
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Note that if Condition1 is satisfie
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where dmin is the minimum Hamming d
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Linear Block Codes - example 1: •
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• S null can be represented by it
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G 1 0 I | P 0 0 0 1 0 0 0 0
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• Compared with the systematic co
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Convolutional Codes ◊ The encoder
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Convolution Codes ‣ Encoding, ‣
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x m m ''' j j 2 j Here each messa
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Representing convolutional codes: C
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- encoder state diagram for (n,k,L)
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• For this reason the non-survive
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sequence is 1 1 0 0 0 0 0 (why?). N
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Error Correction: • If there is n
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correct:1+1+2+2+2=8;8 ( 0.11) 0.88
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Motivation: Performance of Turbo Co
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Performance as a Function of Number
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General Model of Spread Spectrum Sy
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Slow and Fast FHSS: • Frequency s
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- 10 bit spreading code spreads sig
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Direct Sequence Spread Spectrum Usi
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15.Additional Topics: Voice coders
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'Toll Quality' voice coders, such a
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The well-known Shannon-Hartley law
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its for a known permutation of the
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16. Question papers: B. Tech III Ye
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e received code word 110110. Commen
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17. Question Bank 1. (a) State and
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21. A Discrete Memory less Source (
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19. Unit wise Bits CHOOSE THE CORRE
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(d) 5 Answers 1.C 2.D 3.B 4.A 5.C 6
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(b) its capacity gets doubled (c) i
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(d) 6 5. The cascade of two binary
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CHOOSE THE CORRECT ANSWER 1. The mi
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2.C 3.C 4.A 5.D 6.C 7.B 8.B 9.B 10.
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(b) H(X/Y)=1bit/message (c) H(X,Y)=
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(d) log m bits/symbol 6. Theencoder
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3. .Under error free reception, the
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10.B Code No: 56026 Set No. 1 JAWAH
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code No: 56026 Set No. 2 JAWAHARLAL
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B) (Power required)/( Minimum Band
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A) 5 B) 4 C) 2 D) 3 3. Which of the
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Page 179 and 180: A) maximum when the source is conti
Page 181 and 182: Code No: 56026 :2: Set No. 4 II Fil
Page 183 and 184: Code No: 07A5EC09 Set No. 2 JAWAHAR
Page 185 and 186: Cont…..2 Code No: 07A5EC09 :2: Se
Page 187 and 188: 8) For the data word 1110 in a (7,
Page 191 and 192: a) 0 bits b) 1 bit c) 2 bits d) inf
Page 195 and 196: a) increase with its certainty of o
Page 197 and 198: Code No: 07A5EC09 :2: Set No.4 10)
Page 199 and 200: Amplitude of 1v.This speech signal
Page 201 and 202: . Self Information c. Logarithmic m
Page 203 and 204: 75. What are the advantages and dis
Page 205 and 206: 22. Discussion Topics: Data transmi
Page 207 and 208: Applications and history Data (main
Page 209 and 210: o o Mesh network Wireless network A
Page 211 and 212: 25. STUDENTS LIST B.TECH III YEAR I
Page 213 and 214: 48 13R11A04L3 M SAI KUMAR 49 14R18A
Page 215 and 216: Group 8: 36 13R11A04K1 POLISETTY VE
Page 217 and 218: Unit 2 Pulse-Amplitude Modulation :
Page 219 and 220: Unit 3 Differential Pulse-Code Modu
Page 221 and 222: MISSING TOPICS UNIT 1 Hartley's law
Page 223 and 224: encoding the desired information an
Page 225 and 226: • f c denotes center frequency
Page 227: An interleaver installed between th
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