Upgrade to Pro — share decks privately, control downloads, hide ads and more …

Introduction to digital communications.

Francisco J. Escribano
April 30, 2018
Technology
0
32

Introduction to digital communications.

Slides for an undergraduate course on Digital Communications.

Francisco J. Escribano

April 30, 2018
Tweet

More Decks by Francisco J. Escribano

See All by Francisco J. Escribano
Digital TV technologies: present and future
franjescribano
1
140
Introduction to information theory.
franjescribano
0
230
Introduction to medium access.
franjescribano
0
33
Introduction to channel coding.
franjescribano
0
59

Other Decks in Technology

See All in Technology
YJIT Makes Rails 1.7x faster / RubyKaigi 2024
k0kubun
3
480
回り回って効いてくる副次的効果としての技術広報/techpr
nishiuma
1
190
【TSkaigi】2024/05/11 当日スライド
kimitashoichi
14
4k
開発スピードの維持向上を支える、テスト設計の 漸進的進化への取り組み / Continuous Test Design Development for Speed of Product Development
ropqa
0
180
生成AI活用推進の為にやったこと/やらなかったこと
ktc_wada
0
180
大規模言語モデル (LLM)における低精度数値表現
pfn
PRO
3
830
TailwindCSSでUIライブラリを作る際のハマりどころ
shuta13
0
230
[2024년 5월 세미나] 생성형 AI와 함께하는 데이터 분석가 커리어
datarian
0
1.2k
個人的、Kubernetes の最新注目機能！ (2024年5月版) / TechFeed Experts Night#28 〜 コンテナ技術最前線
pfn
PRO
3
210
Autonomous Database Cloud 技術詳細 / adb-s_technical_detail_jp
oracle4engineer
PRO
15
36k
.NET GraphQL Client のリアル
sansantech
PRO
1
310
QAエンジニアが伝えたい品質保証の羅針盤 / Compass for Quality Assurance
mii3king
2
330

Featured

See All Featured
Large-scale JavaScript Application Architecture
addyosmani
504
110k
10 Git Anti Patterns You Should be Aware of
lemiorhan
649
58k
Art, The Web, and Tiny UX
lynnandtonic
290
19k
Gamification - CAS2011
davidbonilla
77
4.6k
Pencils Down: Stop Designing & Start Developing
hursman
117
11k
Learning to Love Humans: Emotional Interface Design
aarron
267
39k
Raft: Consensus for Rubyists
vanstee
133
6.3k
Git: the NoSQL Database
bkeepers
PRO
423
63k
Fontdeck: Realign not Redesign
paulrobertlloyd
76
4.9k
Mobile First: as difficult as doing things right
swwweet
217
8.6k
Designing for humans not robots
tammielis
247
25k
Thoughts on Productivity
jonyablonski
60
3.9k

Transcript

  1. Francisco J. Escribano, 2017-18 DIGITAL COMMUNICATIONS Block 1 Introduction to

    Digital Communications

  2. 2 Digital Communications: introduction

  3. 3 Digital Communications: introduction COMMUNICATION THEORY

  4. 4 Digital Communications: introduction COMMUNICATION THEORY BASIC CONCEPTS

  5. 5 Digital Communications: introduction COMMUNICATION THEORY DIGITAL COMMUNICATIONS BASIC CONCEPTS

  6. 6 Digital Communications: introduction COMMUNICATION THEORY DIGITAL COMMUNICATIONS BASIC CONCEPTS

    ADVANCED CONCEPTS

  7. 7 Digital Communications: introduction COMMUNICATION THEORY DIGITAL COMMUNICATIONS BASIC CONCEPTS

    ADVANCED CONCEPTS

  8. 8 Digital Communications: introduction COMMUNICATION THEORY DIGITAL COMMUNICATIONS COMMUNICATION SYSTEMS

    BASIC CONCEPTS ADVANCED CONCEPTS

  9. 9 Digital Communications: introduction COMMUNICATION THEORY DIGITAL COMMUNICATIONS MOBILE COMMUNICATIONS

    COMMUNICATION SYSTEMS BASIC CONCEPTS ADVANCED CONCEPTS

  10. 10 Digital Communications: introduction COMMUNICATION THEORY DIGITAL COMMUNICATIONS RADIATION AND

    RADIOCOMMUNICATION MOBILE COMMUNICATIONS COMMUNICATION SYSTEMS BASIC CONCEPTS ADVANCED CONCEPTS

  11. 11 Digital Communications: introduction COMMUNICATION THEORY COMMUNICATION CIRCUITS DIGITAL COMMUNICATIONS

    RADIATION AND RADIOCOMMUNICATION MOBILE COMMUNICATIONS COMMUNICATION SYSTEMS BASIC CONCEPTS ADVANCED CONCEPTS

  12. 12 Digital Communications: introduction • Basic texts: – Bernard Sklar,

    Digital Communications, 2001, Prentice Hall (Chapter 1). – Simon Haykin, Communication Systems, 2010, Wiley (Background and preview). – John G. Proakis, Masoud Salehi, Digital Communications, 2008, McGraw-Hill (Chapter 1).

  13. 13 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers

  14. 14 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers

  15. 15 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers

  16. 16 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers Data Stream

  17. 17 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers Data Stream Data Stream

  18. 18 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers MEDIUM Data Stream Data Stream

  19. 19 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers MEDIUM Data Stream Data Stream

  20. 20 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers PHY (1) PHY (1) MEDIUM Data Stream Data Stream

  21. 21 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers PHY (1) MAC (2) (<DLL) PHY (1) MAC (2) (<DLL) MEDIUM Data Stream Data Stream

  22. 22 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers PHY (1) MAC (2) (<DLL) PHY (1) MAC (2) (<DLL) MEDIUM Data Stream Control Control Data Stream

  23. 23 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers PHY (1) MAC (2) (<DLL) PHY (1) MAC (2) (<DLL) MEDIUM Data Stream Control Control Data Stream

  24. 24 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers PHY (1) MAC (2) (<DLL) PHY (1) MAC (2) (<DLL) MEDIUM Digital Communications Data Stream Control Control Data Stream

  25. 25 Digital Communications: introduction • Logical/functional organization of communications ⇒

    layers PHY (1) MAC (2) (<DLL) PHY (1) MAC (2) (<DLL) MEDIUM Telematics Digital Communications Data Stream Control Control Data Stream

  26. 26 Digital Communications: introduction • Before proceeding further... – All

    this is about... transferring information • Some issues: – Can we precisely define information? – How can it and its quality be measured? – Are there any limitations to the amount of information we can transfer? • And the answer is...

  27. 27 Digital Communications: introduction • Before proceeding further... – All

    this is about... transferring information • Some issues: – Can we precisely define information? – How can it and its quality be measured? – Are there any limitations to the amount of information we can transfer? • And the answer is... ?

  28. 28 Digital Communications: introduction • Before proceeding further... – All

    this is about... transferring information • Some issues: – Can we precisely define information? – How can it and its quality be measured? – Are there any limitations to the amount of information we can transfer? • And the answer is... INFORMATION THEORY (Block 2) Source: Wikipedia !

  29. 29 Digital Communications: introduction • What are the main functions

    carried out at the physical layer?

  30. 30 Digital Communications: introduction • What are the main functions

    carried out at the physical layer?

  31. 31 Digital Communications: introduction • What are the main functions

    carried out at the physical layer? WIFI CARD in ADSL modem

  32. 32 Digital Communications: introduction • What are the main functions

    carried out at the physical layer? WIFI CARD in ADSL modem Radio frequency -RF (analog)

  33. 33 Digital Communications: introduction • What are the main functions

    carried out at the physical layer? WIFI CARD in ADSL modem Radio frequency -RF (analog) Upper layers (2,3...)

  34. 34 Digital Communications: introduction • What are the main functions

    carried out at the physical layer? WIFI CARD in ADSL modem Radio frequency -RF (analog) Base- band (digital) Upper layers (2,3...)

  35. 35 Digital Communications: introduction • What are the main functions

    carried out at the physical layer? WIFI CARD in ADSL modem Radio frequency -RF (analog) Base- band (digital) Upper layers (2,3...) • Adaptation to the medium. • Information protection. • Sharing resources. • Signal generation. • Interface between RF and upper layers. • Evaluation and compensation of channel distortions. • …...........................................................

  36. 36 Digital Communications: introduction • What are the main functions

    carried out at the physical layer? WIFI CARD in ADSL modem Radio frequency -RF (analog) Base- band (digital) Upper layers (2,3...) • Adaptation to the medium. • Information protection. • Sharing resources. • Signal generation. • Interface between RF and upper layers. • Evaluation and compensation of channel distortions. • …...........................................................

  37. 37 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially.

  38. 38 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially.

  39. 39 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially.

  40. 40 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. PHY (1) TX

  41. 41 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) PHY (1) TX

  42. 42 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) PHY (1) TX

  43. 43 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX

  44. 44 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX

  45. 45 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX CHANNEL 1 Performance (1)

  46. 46 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX CHANNEL 1 Performance (1)

  47. 47 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX CHANNEL 1 Performance (1) CHANNEL 2 Performance (2)

  48. 48 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX CHANNEL 1 Performance (1) CHANNEL 2 Performance (2)

  49. 49 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX CHANNEL 1 Performance (1) CHANNEL 2 Performance (2) CHANNEL 3 Performance (3)

  50. 50 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX CHANNEL 1 Performance (1) CHANNEL 2 Performance (2) CHANNEL 3 Performance (3) Design & evaluation: Information Theory (Block 2)

  51. 51 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially.

  52. 52 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially.

  53. 53 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially.

  54. 54 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. PHY (1) RX

  55. 55 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) PHY (1) RX

  56. 56 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) PHY (1) RX

  57. 57 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX

  58. 58 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX

  59. 59 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX CHANNEL 1 Performance (1)

  60. 60 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX CHANNEL 1 Performance (1)

  61. 61 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX CHANNEL 2 Performance (2) CHANNEL 1 Performance (1)

  62. 62 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX CHANNEL 2 Performance (2) CHANNEL 1 Performance (1)

  63. 63 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX CHANNEL 2 Performance (2) CHANNEL 1 Performance (1) CHANNEL 3 Performance (3)

  64. 64 Digital Communications: introduction • NOTE: conceptually separated operations. –

    Implementation may be done jointly instead of sequentially. Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX CHANNEL 2 Performance (2) CHANNEL 1 Performance (1) CHANNEL 3 Performance (3) Design & evaluation: Information Theory (Block 2)

  65. 65 Digital Communications: introduction • Additional operations at the PHY.

    Source Destination

  66. 66 Digital Communications: introduction • Additional operations at the PHY.

    Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX Source Destination

  67. 67 Digital Communications: introduction • Additional operations at the PHY.

    Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX Encryption Source Destination

  68. 68 Digital Communications: introduction • Additional operations at the PHY.

    Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX Encryption Source coding Source Destination

  69. 69 Digital Communications: introduction • Additional operations at the PHY.

    Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX Distortion Noise Limitations Encryption Source coding Source Destination

  70. 70 Digital Communications: introduction • Additional operations at the PHY.

    Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX Distortion Noise Limitations Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX Encryption Source coding Source Destination

  71. 71 Digital Communications: introduction • Additional operations at the PHY.

    Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX Distortion Noise Limitations Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX Encryption Source coding Decryption Source Destination

  72. 72 Digital Communications: introduction • Additional operations at the PHY.

    Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX Distortion Noise Limitations Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX Encryption Source coding Decryption Source decoding Source Destination

  73. 73 Digital Communications: introduction • Additional operations at the PHY.

    Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX Distortion Noise Limitations Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX Encryption Source coding Decryption Source decoding Source Destination

  74. 74 Digital Communications: introduction • Additional operations at the PHY.

    Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX Distortion Noise Limitations Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX Encryption Source coding Decryption Source decoding Source Destination Block 2

  75. 75 Digital Communications: introduction • Additional operations at the PHY.

    Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX Distortion Noise Limitations Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX Encryption Source coding Decryption Source decoding Source Destination Block 2

  76. 76 Digital Communications: introduction • Additional operations at the PHY.

    Medium access Medium access (Block 4) (Block 4) Modulation Modulation (CT & Block 2) (CT & Block 2) Channel coding Channel coding (Block 3) (Block 3) PHY (1) TX Distortion Noise Limitations Medium access Medium access (Block 4) (Block 4) Demodulation Demodulation (CT & Block 2) (CT & Block 2) Channel Channel decoding decoding (Block 3) (Block 3) PHY (1) RX Encryption Source coding Decryption Source decoding Source Destination Block 2 Basic hypothesis: equiprobable binary sequence P(b=0)=P(b=1)=0.5

  77. 77 Digital Communications: introduction • Design and performance criteria/parameters. –

    Already known for those familiar with Comunication Theory. – They are evaluated for each level/layer, point to point. – Basic issue: limitations and tradeoffs → optimization.

  78. 78 Digital Communications: introduction • Design and performance criteria/parameters. –

    Already known for those familiar with Comunication Theory. – They are evaluated for each level/layer, point to point. – Basic issue: limitations and tradeoffs → optimization. iDude

  79. 79 Digital Communications: introduction • Design and performance criteria/parameters. –

    Already known for those familiar with Comunication Theory. – They are evaluated for each level/layer, point to point. – Basic issue: limitations and tradeoffs → optimization. iDude SNR, Eb/N0

  80. 80 Digital Communications: introduction • Design and performance criteria/parameters. –

    Already known for those familiar with Comunication Theory. – They are evaluated for each level/layer, point to point. – Basic issue: limitations and tradeoffs → optimization. iDude SNR, Eb/N0 Available power

  81. 81 Digital Communications: introduction • Design and performance criteria/parameters. –

    Already known for those familiar with Comunication Theory. – They are evaluated for each level/layer, point to point. – Basic issue: limitations and tradeoffs → optimization. iDude SNR, Eb/N0 Available power Transmission rate

  82. 82 Digital Communications: introduction • Design and performance criteria/parameters. –

    Already known for those familiar with Comunication Theory. – They are evaluated for each level/layer, point to point. – Basic issue: limitations and tradeoffs → optimization. iDude SNR, Eb/N0 Bandwidth Available power Transmission rate

  83. 83 Digital Communications: introduction • Design and performance criteria/parameters. –

    Already known for those familiar with Comunication Theory. – They are evaluated for each level/layer, point to point. – Basic issue: limitations and tradeoffs → optimization. iDude SNR, Eb/N0 Bandwidth Available power Transmission rate Error probability

  84. 84 Digital Communications: introduction • Design and performance criteria/parameters. –

    Already known for those familiar with Comunication Theory. – They are evaluated for each level/layer, point to point. – Basic issue: limitations and tradeoffs → optimization. iDude SNR, Eb/N0 Bandwidth Available power Transmission rate Error probability Distortion Interference

  85. 85 Digital Communications: introduction

  86. 86 MEDIUM Digital Communications: introduction Medium access Medium access (TX)

    (TX) Medium access Medium access (RX) (RX)

  87. 87 MEDIUM Digital Communications: introduction Medium access Medium access (TX)

    (TX) Medium access Medium access (RX) (RX) R max ________ SNR ____ Allowed interference ____ Reliability ____ BW max ____ P max

  88. 88 MEDIUM Digital Communications: introduction Medium access Medium access (TX)

    (TX) Medium access Medium access (RX) (RX) R max ________ SNR ____ Allowed interference ____ Reliability ____ BW max ____ P max R 1 SNR 1 BW 1 ...

  89. 89 MEDIUM Digital Communications: introduction Medium access Medium access (TX)

    (TX) Medium access Medium access (RX) (RX) R max ________ SNR ____ Allowed interference ____ Reliability ____ BW max ____ P max R 2 SNR 2 BW 2 ... R 1 SNR 1 BW 1 ...

  90. 90 MEDIUM Digital Communications: introduction Medium access Medium access (TX)

    (TX) Medium access Medium access (RX) (RX) R max ________ SNR ____ Allowed interference ____ Reliability ____ BW max ____ P max …...... R 2 SNR 2 BW 2 ... R 1 SNR 1 BW 1 ... R n SNR n BW n ...

  91. 91 MEDIUM Digital Communications: introduction Medium access Medium access (TX)

    (TX) Medium access Medium access (RX) (RX) R max ________ SNR ____ Allowed interference ____ Reliability ____ BW max ____ P max …...... R 2 SNR 2 BW 2 ... R 1 SNR 1 BW 1 ... R n SNR n BW n ... …...... R' 2 SNR' 2 BW' 2 ... R' 1 SNR' 1 BW' 1 ... R' n SNR' n BW' n ...

  92. 92 MEDIUM Digital Communications: introduction Medium access Medium access (TX)

    (TX) Medium access Medium access (RX) (RX) R max ________ SNR ____ Allowed interference ____ Reliability ____ BW max ____ P max …...... R 2 SNR 2 BW 2 ... R 1 SNR 1 BW 1 ... R n SNR n BW n ... …...... R' 2 SNR' 2 BW' 2 ... R' 1 SNR' 1 BW' 1 ... R' n SNR' n BW' n ... SHARE AND MANAGE LIMITED RESOURCES

  93. 93 MEDIUM Digital Communications: introduction Medium access Medium access (TX)

    (TX) Medium access Medium access (RX) (RX) R max ________ SNR ____ Allowed interference ____ Reliability ____ BW max ____ P max …...... R 2 SNR 2 BW 2 ... R 1 SNR 1 BW 1 ... R n SNR n BW n ... …...... R' 2 SNR' 2 BW' 2 ... R' 1 SNR' 1 BW' 1 ... R' n SNR' n BW' n ... SHARE AND MANAGE LIMITED RESOURCES Information Theory

  94. 94 Digital Communications: introduction

  95. 95 Digital Communications: introduction Modulation Modulation (TX) (TX) Demodulation Demodulation

    (RX) (RX)

  96. 96 CHANNEL Digital Communications: introduction Modulation Modulation (TX) (TX) Demodulation

    Demodulation (RX) (RX)

  97. 97 CHANNEL Digital Communications: introduction Modulation Modulation (TX) (TX) Demodulation

    Demodulation (RX) (RX) R mod ____ SNR ____ Es/N0 ____ P s (e) ____ BW mod ____ P mod

  98. 98 CHANNEL Digital Communications: introduction Modulation Modulation (TX) (TX) Demodulation

    Demodulation (RX) (RX) R mod ____ SNR ____ Es/N0 ____ P s (e) ____ BW mod ____ P mod

  99. 99 CHANNEL Digital Communications: introduction Modulation Modulation (TX) (TX) Demodulation

    Demodulation (RX) (RX) R mod ____ SNR ____ Es/N0 ____ P s (e) ____ BW mod ____ P mod

  100. 100 CHANNEL Digital Communications: introduction Modulation Modulation (TX) (TX) Demodulation

    Demodulation (RX) (RX) R mod ____ SNR ____ Es/N0 ____ P s (e) ____ BW mod ____ P mod P b (e) _____ Eb/N0 _____ R b

  101. 101 CHANNEL Digital Communications: introduction Modulation Modulation (TX) (TX) Demodulation

    Demodulation (RX) (RX) R mod ____ SNR ____ Es/N0 ____ P s (e) ____ BW mod ____ P mod P b (e) _____ Eb/N0 _____ R b ADAPT SIGNALS TO THE CHANNEL AND IMPROVE PERFORMANCE

  102. 102 CHANNEL Digital Communications: introduction Modulation Modulation (TX) (TX) Demodulation

    Demodulation (RX) (RX) R mod ____ SNR ____ Es/N0 ____ P s (e) ____ BW mod ____ P mod P b (e) _____ Eb/N0 _____ R b ADAPT SIGNALS TO THE CHANNEL AND IMPROVE PERFORMANCE Information Theory

  103. 103 Digital Communications: introduction

  104. 104 Digital Communications: introduction Channel coding Channel coding (TX) (TX)

    Channel Channel decoding decoding (RX) (RX)

  105. 105 CHANNEL Digital Communications: introduction Channel coding Channel coding (TX)

    (TX) Channel Channel decoding decoding (RX) (RX)

  106. 106 CHANNEL Digital Communications: introduction Channel coding Channel coding (TX)

    (TX) Channel Channel decoding decoding (RX) (RX) P b (e) ________ Eb/N0(out) ____ R b

  107. 107 CHANNEL Digital Communications: introduction Channel coding Channel coding (TX)

    (TX) Channel Channel decoding decoding (RX) (RX) P b (e) ________ Eb/N0(out) ____ R b

  108. 108 CHANNEL Digital Communications: introduction Channel coding Channel coding (TX)

    (TX) Channel Channel decoding decoding (RX) (RX) P b (e) ________ Eb/N0(out) ____ R b

  109. 109 CHANNEL Digital Communications: introduction Channel coding Channel coding (TX)

    (TX) Channel Channel decoding decoding (RX) (RX) P b (e) ________ Eb/N0(out) ____ R b P' b (e)<P b (e) _____ Eb/N0(in) _____ R' b <R b

  110. 110 CHANNEL Digital Communications: introduction Channel coding Channel coding (TX)

    (TX) Channel Channel decoding decoding (RX) (RX) P b (e) ________ Eb/N0(out) ____ R b P' b (e)<P b (e) _____ Eb/N0(in) _____ R' b <R b PROTECT INFORMATION INTEGRITY AT THE COST OF DATA RATE

  111. 111 CHANNEL Digital Communications: introduction Channel coding Channel coding (TX)

    (TX) Channel Channel decoding decoding (RX) (RX) P b (e) ________ Eb/N0(out) ____ R b P' b (e)<P b (e) _____ Eb/N0(in) _____ R' b <R b PROTECT INFORMATION INTEGRITY AT THE COST OF DATA RATE Information Theory

  112. 112 Digital Communications: introduction • Example: WiFi standard (access: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4248378)

  113. 113 Digital Communications: introduction • Example: WiFi standard (access: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4248378)

  114. 114 Digital Communications: introduction • Example: WiFi standard (access: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4248378)

  115. 115 Digital Communications: introduction • Example: WiFi standard (access: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=4248378)

  116. 116 Digital Communications: introduction • Medium access (channel identification).

  117. 117 Digital Communications: introduction • Medium access (channel identification).

  118. 118 Digital Communications: introduction • Medium access (channel identification).

  119. 119 Digital Communications: introduction • Medium access (channel identification). Signal

    generation

  120. 120 Digital Communications: introduction • Medium access + modulation.

  121. 121 Digital Communications: introduction • Medium access + modulation.

  122. 122 Digital Communications: introduction • Medium access + modulation.

  123. 123 Digital Communications: introduction • Medium access + modulation.

  124. 124 Digital Communications: introduction • Medium access + modulation.

  125. 125 Digital Communications: introduction • Medium access + modulation. Different

    modes for resource sharing

  126. 126 Digital Communications: introduction • Medium access + modulation. Different

    modes for resource sharing

  127. 127 Digital Communications: introduction • Modulation and channel coding.

  128. 128 Digital Communications: introduction • Modulation and channel coding.

  129. 129 Digital Communications: introduction • Modulation and channel coding.

  130. 130 Digital Communications: introduction • Modulation and channel coding. Modulator

  131. 131 Digital Communications: introduction • Modulation and channel coding. Modulator

  132. 132 Digital Communications: introduction • Modulation and channel coding. Modulator

    Channel encoder

  133. 133 Digital Communications: introduction • Modulation and channel coding. Modulator

    Channel encoder

  134. 134 Digital Communications: introduction • Channel encoder.

  135. 135 Digital Communications: introduction • Channel encoder.

  136. 136 Digital Communications: introduction • Channel encoder.

  137. 137 Digital Communications: introduction • Channel encoder.

  138. 138 Digital Communications: introduction • Channel encoder. Algebraic structure

  139. 139 Digital Communications: introduction • Channel encoder. Algebraic structure

  140. 140 Digital Communications: introduction • Channel encoder. Algebraic structure Implementation:

    finite-state machine

  141. 141 Digital Communications: introduction • It is important to discern

    – Abstract operations / layers (“divide and conquer”). – HW implementation. • Recall always – Basic scheme of Digital Communications. – Design and evaluation parameters. – Concepts from Communication Theory and Signals and Systems. • Main purpose: – Given some resources, and some target conditions and target performance, manage to evaluate and/or design the appropriate subsystems.