2[1].1 data transmission

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

2[1].1 data transmission

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