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2[1].1 data transmission

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Hattori Sidek
Hattori Sidek

The document introduces some key concepts in data communication, including: 1) Different types of transmission media such as guided (e.g. fiber optic cable) and unguided (e.g. wireless). 2) Analog and digital signals and how analog data can be transmitted using either type of signal. 3) Factors that can impair transmission such as attenuation, delay distortion, and different types of noise. The Nyquist bandwidth and Shannon capacity formulas for calculating maximum data rates are also covered.

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Chapter 2 Data Communication 2.1 Data Transmission Key Points
Terminology (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Terminology (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Terminology (3) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Frequency ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Analog and Digital Data Transmission ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Analog and Digital Data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Analogue & Digital Signals Data and Computer Communications
Periodic Signals Data and Computer Communications Amplitude Period = T = 1/ f Period = T = 1/ f Amplitude
Sine Wave ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Varying Sine Waves s(t) = A sin(2  ft +  ) Data and Computer Communications A = 0.5 f = 1 Hz, T =1 s f = 2 Hz, T =0.5 s
Components of Speech ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Conversion of Voice Input into Analog Signal Data and Computer Communications
Binary Digital Data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Conversion of PC Input to Digital Signal Data and Computer Communications - - 1 signal = 0.02 msec 1 sec = 1000 msec = 50,000 bits
Data and Signals ,[object Object],[object Object],[object Object],Data and Computer Communications Digital signal modulator Analog signal demodulator Digital signal Transmission medium
Data and Signals(2) ,[object Object],[object Object],[object Object],[object Object],Data and Computer Communications Analog signal codec digital signal receiver Transmission medium
Analog Signals Carrying Analog and Digital Data Data and Computer Communications
Digital Signals Carrying Analog and Digital Data Data and Computer Communications
Analog Transmission ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Digital Transmission ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Advantages of Digital Transmission ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Transmission Impairments ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Attenuation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Delay Distortion ,[object Object],[object Object],[object Object],Data and Computer Communications For voice communication, this would probably not be noticeable but for data communication using modems, this could affect the phase of the carrier or the modulation technique used to encode the data.
Noise (1) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications Intermodulation
Noise (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Thermal Noise ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Channel Capacity ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Channel Capacity (cont) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Nyquist Bandwidth ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications C = Channel capacity
Nyquist Bandwidth (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Nyquist Bandwidth (3) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Nyquist Bandwidth (4) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Shannon Capacity Formula ,[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Shannon Capacity Formula (2) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Shannon Capacity Formula (3) ,[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Shannon Capacity Formula (3) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
Shannon Capacity Formula (4) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Data and Computer Communications END!!!
CONCLUSION ,[object Object],[object Object],[object Object],Data and Computer Communications
Key Points ,[object Object],[object Object],[object Object],Data and Computer Communications
Key Points (2) ,[object Object],[object Object],[object Object],[object Object],Data and Computer Communications
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],LSI and VLSI Data and Computer Communications
FDM and TDM Data and Computer Communications FDM TDM

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Ch7 structuresCh7 structures
Ch7 structures
 
13 atm
13 atm13 atm
13 atm
 
12 wireless la-ns
12 wireless la-ns12 wireless la-ns
12 wireless la-ns
 
11 circuit-packet
11 circuit-packet11 circuit-packet
11 circuit-packet
 
10 high speedla-ns
10 high speedla-ns10 high speedla-ns
10 high speedla-ns
 
9 lan
9 lan9 lan
9 lan
 
8 spread spectrum
8 spread spectrum8 spread spectrum
8 spread spectrum
 
7 multiplexing
7 multiplexing7 multiplexing
7 multiplexing
 
6 data linkcontrol
6 data linkcontrol6 data linkcontrol
6 data linkcontrol
 
5 digital datacomm
5 digital datacomm5 digital datacomm
5 digital datacomm
 

2[1].1 data transmission

  • 1. Chapter 2 Data Communication 2.1 Data Transmission Key Points
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  • 8. Analogue & Digital Signals Data and Computer Communications
  • 9. Periodic Signals Data and Computer Communications Amplitude Period = T = 1/ f Period = T = 1/ f Amplitude
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  • 11. Varying Sine Waves s(t) = A sin(2  ft +  ) Data and Computer Communications A = 0.5 f = 1 Hz, T =1 s f = 2 Hz, T =0.5 s
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  • 13. Conversion of Voice Input into Analog Signal Data and Computer Communications
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  • 15. Conversion of PC Input to Digital Signal Data and Computer Communications - - 1 signal = 0.02 msec 1 sec = 1000 msec = 50,000 bits
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  • 18. Analog Signals Carrying Analog and Digital Data Data and Computer Communications
  • 19. Digital Signals Carrying Analog and Digital Data Data and Computer Communications
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  • 44. FDM and TDM Data and Computer Communications FDM TDM
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