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Representing convolutional codes: Code tree: (n,k,L) = (2,1,2) encoder x' m m m x'' m m j j2 j j j2 j1 j x x' x'' x' x'' x' x'' ... out 1 1 2 2 3 3
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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
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 112 and 113: Representing convolutional codes co
Page 114 and 115: • Problem of optimum decoding is
Page 116 and 117: The maximum likelihood path: The de
Page 118 and 119: Hamming Code Example: • H(7,4)
Page 120 and 121: Example of CRC: Example: Using gene
Page 122 and 123: Turbo Codes: • Backgound - Turbo
Page 124 and 125: Why Interleaving and Recursive Enco
Page 126 and 127: - Poor performance at very low BER.
Page 128 and 129: - 300 ms in IEEE 802.11 - Some numb
Page 130 and 131: Fast Frequency Hop Spread Spectrum
Page 132 and 133: Direct Sequence Spread Spectrum Tra
Page 134 and 135: • Consider A communicating with b
Page 136 and 137: esynthesize a version of the origin
Page 138 and 139: RAWCLI vocoder Robust Advanced Low
Page 140 and 141: • Complex valued signal • No in
Page 142 and 143: An interleaver installed between th
Page 144 and 145: B. Tech III Year II Semester Examin
Page 146 and 147: ) What are the two basic types of s
Page 148 and 149: 12. (a) Derive an expression for er
Page 150 and 151: 18. Assignment topics Unit 1: 1. Ce
Page 152 and 153: 6. Which of the following is correc
Page 154 and 155: (b) Single error correcting and dou
Page 156 and 157: 8.C 9.D 10.D 11.A Unit 2 CHOOSE THE
Page 158 and 159: (b) Capacity of the channel gets do
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(d) 56 7. The output of a source is
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(c) discretely transmitted (d) with
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Unit 5 CHOOSE THE CORRECT ANSWER 1.
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(c) 3Kbps (d) 6Kbps Answers 1.A 2.A
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8 The fundamental limit on the aver
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Code No: 56026 :2: Set No. 1 II Fil
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code No: 56026 :2: Set No. 2 II Fil
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A) (Minimum Band width)/ (Transmiss
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12. to transmit the information sig
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Code No: 56026 :2: Set No. 2 II Fil
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Code No: 56026 Set No. 4 JAWAHARLAL
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A) ASK B)PSK C)FSK D)DPSK 9) Compan
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Code No: 07A5EC09 :2: Set No.2 II F
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Cont…..2 Code No: 07A5EC09 :2: Se
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c) shannons channel coading d) Shan
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Code No: 07A5EC09 :2: Set No.3 10)
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a) increase with its certainty of o
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Code No: 07A5EC09 :2: Set No.2 10)
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Code No: 07A5EC09 Set No. 4 JAWAHAR
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7. Explain about the bandwidth and
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44. Derive an expression for error
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66. Show that if g(x) is a polynomi
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86. For the convolutional encoder s
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Protocol layers and sub-topics OSI
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Baseband or passband transmission T
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23. References, Journals, websites
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22 13R11A04H7 KOMANDLA SRIKANTH RED
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16 13R11A04H1 KOMIRISHETTY AKHILA 1
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10. Tutorial class sheets UNIT-1 SA
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• The most common technique for s
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Unit 4 CORRELATIVE LEVEL CODING:
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Noisy channel coding theorem and ca
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S(f) is the signal power spectrum N
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There are many different instantiat
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ASSIGNMENT TOPICS Unit I: 1. Certai
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CLOSURE REPORT Here the closure rep
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