dc

Recommendations

Info

2. Syllabus Copy Jawaharlal Nehru Technological University Hyderabad, Hyderabad DIGITAL COMMUNICATIONS Programme: B.Tech (ECE) Year & Sem: III B.Tech II Sem UNIT I : Elements Of Digital Communication Systems Advantages of digital communication systems, Bandwidth- S/N trade off, Hartley Shannon law, Sampling theorem Pulse Coded Modulation PCM generation and reconstruction , Quantization noise, Non-uniform Quantization and Companding, Differential PCM systems (DPCM), Adaptive DPCM, Delta modulation, adaptive delta modulation, Noise in PCM and DM systems UNIT II : Digital Modulation Techniques introduction , ASK, ASK Modulator, Coherent ASK detector, non-Coherent ASK detector, FSK, Band width frequency spectrum of FSK, Non-Coherent FSK detector, Coherent FSK detector, FSK Detection using PLL, BPSK, Coherent PSK detection, QPSK, Differential PSK UNIT III: Base Band Transmission And Optimal Reception of Digital Signal Pulse shaping for optimum transmission, A Base band signal receiver, Probability of error, optimum receiver, Optimum of coherent reception, Signal space representation and probability of error, Eye diagrams for ASK,FSK and PSK, cross talk, Information Theory Information and entropy, Conditional entropy and redundancy, Shannon Fano coding, mutual information, Information loss due to noise, Source codings,- Huffman code, variable length coding. Source coding to increase average information per bit, Lossy source Coding, UNIT IV : Error Control Codes Matrix description of linear block codes, Error detection and error correction capabilities of linear block codes, Cyclic codes: Algebraic structure, encoding, Syndrome calculation, decoding
Convolution Codes: Encoding, decoding using state, Tree and trellis diagrams, Decoding using Viterbi algorithm, Comparison of error rates in coded and uncoded transmission. UNIT V : Spread Spectrum Modulation Use of spread spectrum, direct sequence spread spectrum(DSSS), Code division multiple access, Ranging using DSSS, Frequency Hopping spread spectrum, PN Sequences: generation and characteristics, Synchronization in spread spectrum system TEXT BOOKS: 1. Principles Of Communication Systems-Herberet Taub, Donald L Schiling, Goutham saha,3rf edition, Mc Graw Hill 2008 2. digital and anolog communiation systems- Sam Shanmugam, John Wiley,2005 3. Digital Communications- John G.Proakis, Masoud Salehi – 5 th Edition, Mcgraw-Hill, 2008 REFERNCES: 1. Digital communications- Simon Haykin, John Wiley, 2005 2. Digital Communications 3rd Ed - I. A.Glover, P. M. Grant, 2 nd Edition, Pearson Edu,, 2008 3. Communication Systems ---- B.P.Lathi, BS Publications, 2006 4. A first course in Digital Communication Systems – Nguyen, Shewedyh, Cambridge 5. Digital Communication – Theory, Techniques, and Applications – R.N.Mutagi, 2 nd Edition, 2013
Page 1 and 2: DC COURSE FILE
Page 3: GEETHANJALI COLLEGE OF ENGINEERING
Page 7 and 8: III. To inculcate positive attitude
Page 9 and 10: 7. Importance of the course and how
Page 11 and 12: DC 12: Compute the power and bandwi
Page 13 and 14: 10. Course mapping with PEO’s and
Page 15 and 16: 13.Micro plan : Sl. no Unit No. Tot
Page 17 and 18: 14.Detailed Notes UNIT 1 : Elements
Page 19 and 20: A communication system may transmit
Page 21: the wavelength is extremely long, m
Page 25 and 26: asic elements of digital communicat
Page 27 and 28: 4. Channel introduced many types of
Page 29 and 30: 5. Bandwidth is another scarce reso
Page 35 and 36: Pulse Code Modulation ‣ PCM gener
Page 37: 77777333333333333333333333333333333
Page 40 and 41: • The most common technique for s
Page 42 and 43: Pulse Code Modulation (PCM) : • P
Page 44 and 45: Figure 3.11 Illustration of the qua
Page 46 and 47: Quantization (nonuniform quantizer)
Page 48 and 49: Time-Division Multiplexing(TDM):
Page 50 and 51: Let m n where T The error signal is
Page 52 and 53: 3. Simplify receiver design Because
Page 54 and 55:
Figure 3.27 Block diagram illustrat
Page 56 and 57:
Adaptive Differential Pulse-Code Mo
Page 59 and 60:
ASK, OOK, MASK: • The amplitude (
Page 61 and 62:
Frequency Shift Keying: • One fre
Page 63 and 64:
s t Acos 2f ct 3 Acos 2f
Page 65 and 66:
QAM and QPR: • QAM is a combinati
Page 67 and 68:
Generation and Detection of Coheren
Page 69 and 70:
Figure 6.29 Signal-space diagram fo
Page 72 and 73:
UNIT 3 Base Band Transmission And O
Page 74 and 75:
• The tails of hI(t) decay as 1/|
Page 76 and 77:
• precoding d b d k k k2 symbol 1
Page 78 and 79:
h( t) N 1 n w n sin c t T b
Page 80 and 81:
• Equalization : to compensate fo
Page 82 and 83:
e n y n 2E en 2E en 2Eenxnk
Page 84 and 85:
- Flexibility - Same H/W may be tim
Page 86 and 87:
Interpretation of Eye Diagram:
Page 88 and 89:
The set of source symbols is called
Page 90 and 91:
We will usually neglect to mention
Page 92 and 93:
Note that if Condition1 is satisfie
Page 94 and 95:
where dmin is the minimum Hamming d
Page 96 and 97:
Linear Block Codes - example 1: •
Page 98 and 99:
• S null can be represented by it
Page 100 and 101:
G 1 0 I | P 0 0 0 1 0 0 0 0
Page 102 and 103:
• Compared with the systematic co
Page 104 and 105:
Convolutional Codes ◊ The encoder
Page 106 and 107:
Convolution Codes ‣ Encoding, ‣
Page 108 and 109:
x m m ''' j j 2 j Here each messa
Page 110:
Representing convolutional codes: C
Page 113 and 114:
- encoder state diagram for (n,k,L)
Page 115 and 116:
• For this reason the non-survive
Page 117 and 118:
sequence is 1 1 0 0 0 0 0 (why?). N
Page 119 and 120:
Error Correction: • If there is n
Page 121 and 122:
correct:1+1+2+2+2=8;8 ( 0.11) 0.88
Page 123 and 124:
Motivation: Performance of Turbo Co
Page 125 and 126:
Performance as a Function of Number
Page 127 and 128:
General Model of Spread Spectrum Sy
Page 129 and 130:
Slow and Fast FHSS: • Frequency s
Page 131 and 132:
- 10 bit spreading code spreads sig
Page 133 and 134:
Direct Sequence Spread Spectrum Usi
Page 135 and 136:
15.Additional Topics: Voice coders
Page 137 and 138:
'Toll Quality' voice coders, such a
Page 139 and 140:
The well-known Shannon-Hartley law
Page 141 and 142:
its for a known permutation of the
Page 143 and 144:
16. Question papers: B. Tech III Ye
Page 145 and 146:
e received code word 110110. Commen
Page 147 and 148:
17. Question Bank 1. (a) State and
Page 149 and 150:
21. A Discrete Memory less Source (
Page 151 and 152:
19. Unit wise Bits CHOOSE THE CORRE
Page 153 and 154:
(d) 5 Answers 1.C 2.D 3.B 4.A 5.C 6
Page 155 and 156:
(b) its capacity gets doubled (c) i
Page 157 and 158:
(d) 6 5. The cascade of two binary
Page 159 and 160:
CHOOSE THE CORRECT ANSWER 1. The mi
Page 161 and 162:
2.C 3.C 4.A 5.D 6.C 7.B 8.B 9.B 10.
Page 163 and 164:
(b) H(X/Y)=1bit/message (c) H(X,Y)=
Page 165 and 166:
(d) log m bits/symbol 6. Theencoder
Page 167 and 168:
3. .Under error free reception, the
Page 169 and 170:
10.B Code No: 56026 Set No. 1 JAWAH
Page 171 and 172:
code No: 56026 Set No. 2 JAWAHARLAL
Page 173 and 174:
B) (Power required)/( Minimum Band
Page 175 and 176:
A) 5 B) 4 C) 2 D) 3 3. Which of the
Page 177 and 178:
Code No: 56026 Set No. 2 JAWAHARLAL
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 189 and 190:
Page 191 and 192:
a) 0 bits b) 1 bit c) 2 bits d) inf
Page 193 and 194:
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 and 228:
An interleaver installed between th
Page 229 and 230:
Subject Contents 1.7. 1. Synopsis p
show all

dc

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?