Chapter 4 Book Notes - Chapter 4 Line coding is the process...

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Chapter 4 Line coding is the process of converting digital data to digital signals Line coding is always needed, block coding and scrambling may or may not be needed. Data rate is the number of bits/sec (bit rate) Signal rate is the number of signal elements/sec. AKA pulse rate, modulation rate, baud rate. *Although the actual bandwidth of a digital signal is infinite, the effective bandwidth is finite. Maximum data rate of a channel is Nmax = 2 x B x log 2 L *In NRZ-L the level of the voltage determines the value of the bit. In NRZ-I the inversion or the lack of inversion determines the value of the bit. *NRZ-L and NRZ-I both have an average signal rate of N/2 Bd. *NRZ-L and NRZ-I both have a DC component problem *In Manchester and differential Manchester encoding, the transition at the middle of the bit is used for synchronization *The minimum bandwidth of Manchester and differential Manchester is 2 times that of NRZ.
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This note was uploaded on 10/05/2010 for the course CNT CNT 3004 taught by Professor K during the Spring '10 term at University of Central Florida.

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Chapter 4 Book Notes - Chapter 4 Line coding is the process...

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