Line coding - NTNU
Line coding - NTNU
Line coding - NTNU
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Eye curve for AMI code with DC cutoff<br />
Cosine rolloff 100% +<br />
H( f )=<br />
j<br />
j +2 0.02<br />
AMI is a balanced <br />
line code ): small ISI<br />
Digital Communication, <strong>Line</strong> codes and scrambling<br />
IET, <strong>NTNU</strong><br />
13<br />
Power spectrum of a line code<br />
Transmitted signal:<br />
X(t) =<br />
<br />
a k<br />
g(t kT)<br />
k=<br />
Power spectrum:<br />
S X<br />
( f ) = 1 T S a (e j 2 fT ) G( f ) 2<br />
S a (z) : Time discrete power spectrum of sequence {a k } <br />
Digital Communication, <strong>Line</strong> codes and scrambling<br />
IET, <strong>NTNU</strong><br />
14
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