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increase average information per bit. CO 6: Generate and retrieve data using block codes and solve numerical problems on error detection and correction capabilities. CO 7: Solve problems on generation and decoding of data using convolution codes and compare error rates for coded and uncoded transmission. CO 8: Describe the different criteria in spread spectrum modulation scheme and its applications. 2 1 1 2 1 1 2 1 1 2 2 1 1 2 1 1 2 1 1 2 2 2 2 1 1 1 1 2 2 2 2 11.Class Time Tables: 12.Individual time table:
13.Micro plan : Sl. no Unit No. Total no of Period s Topics to be covered Total no. of hours Date Regular/ Additiona l Teaching aids used LCD/OHP /BB Rem arks 1 Elements Of Digital Communication 1 Regular OHP,BB Systems: Model of digital communication system 2 Model of digital communication system 1 Regular OHP,BB Digital representation of analog signal 3 Certain issues of digital transmission 1 Regular OHP,BB 5 advantages of digital communication 1 Regular OHP,BB systems, Bandwidth- S/N, Hartley Shannon law trade off, 6 1 Additional BB 7 Sampling theorem 1 Regular OHP,BB 8 07 Tutorial class-1 1 BB UNIT - I 9 Pulse Coded Modulation: PCM generation 1 Regular BB and reconstruction , Quantization noise 10 Differential PCM systems (DPCM), Delta 1 Regular OHP,BB modulation, 11 adaptive delta modulation, Noise in PCM 1 Regular OHP,BB and DM systems 12 Voice Coders 1 Additional BB 13 Tutorial Class-2 1 Regular BB 14 07 Solving University papers 1 OHP,BB 15 Assignment test-1 1 16 Digital Modulation Techniques: 1 Regular BB introduction , ASK, ASK Modulator 17 Coherent ASK detector, non-Coherent ASK 1 Regular detector 18 Band width frequency spectrum of FSK, 1 Regular OHP,BB Non-Coherent FSK detector 19 Coherent FSK detector, FSK Detection 1 Regular OHP,BB 08 using PLL 20 BPSK, Coherent PSK detection, 1 Regular BB 21 QPSK, Differential PSK 1 Regular BB 22 Regenerative Repeater 1 Additional OHP,BB 23 Tutorial class-3 1 Regular BB 24 Base Band Transmission And Optimal 1 Regular OHP,BB reception of Digital Signal: pulse shaping for optimum transmission 25 A Base band signal receiver, Different 1 Regular OHP,BB 08 pulses and power spectrum densities 26 Probability of error, optimum receiver 1 Regular BB 27 Optimum of coherent reception, 1 Regular OHP,BB 28 Signal space representation and probability 1 Regular OHP,BB of error, Eye diagram, cross talk 29 Tutorial Class-4 1 Regular BB 30 Solving University papers 1 Regular OHP,BB UNIT-II IUNIT- III
Page 1 and 2: DC COURSE FILE
Page 3 and 4: GEETHANJALI COLLEGE OF ENGINEERING
Page 5 and 6: Convolution Codes: Encoding, decodi
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: 10. Course mapping with PEO’s and
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
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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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Code No: 56026 Set No. 2 JAWAHARLAL
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A) maximum when the source is conti
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Code No: 56026 :2: Set No. 4 II Fil
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Code No: 07A5EC09 Set No. 2 JAWAHAR
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Cont…..2 Code No: 07A5EC09 :2: Se
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8) For the data word 1110 in a (7,
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a) 0 bits b) 1 bit c) 2 bits d) inf
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a) increase with its certainty of o
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Code No: 07A5EC09 :2: Set No.4 10)
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Amplitude of 1v.This speech signal
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. Self Information c. Logarithmic m
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75. What are the advantages and dis
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22. Discussion Topics: Data transmi
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Applications and history Data (main
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o o Mesh network Wireless network A
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25. STUDENTS LIST B.TECH III YEAR I
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48 13R11A04L3 M SAI KUMAR 49 14R18A
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Group 8: 36 13R11A04K1 POLISETTY VE
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Unit 2 Pulse-Amplitude Modulation :
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Unit 3 Differential Pulse-Code Modu
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MISSING TOPICS UNIT 1 Hartley's law
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encoding the desired information an
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• f c denotes center frequency
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An interleaver installed between th
Page 229 and 230:
Subject Contents 1.7. 1. Synopsis p
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