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Digital Communications I:
Modulation and Coding Course
Term 3 - 2008
Catharina Logothetis
Lecture 5
Lecture 5 20
Eb/No figure of merit in digital
communications
SNR or ... noise vector are i.i.d
Gaussian random variables with zero-mean and
variance . The noise vector pdf is
The elements of observed vector are
independent Gaussian...
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Digital Communications I:
Modulation and Coding Course
Term 3 - 2008
Catharina Logothetis
Lecture 13
Lecture 13 20
Design example of coded systems …
Choose a modulation/ coding scheme ... signaling
Bandwidth efficiency:
Assuming Nyquist (ideal rectangular) filtering at baseband,
the required passband bandwidth is:
M-PSK and M-QAM (b...
... Digital communications I:
Modulation and Coding Course
Period 3 - 2007
Catharina Logothetis
Lecture 6
Lecture 6 10
The raised cosine filter
Raised-Cosine ... noise and no ISI)
Lecture 6 17
Example of eye pattern:
Binary-PAM, SRRQ pulse …
AWGN (Eb/N0=20 dB) and no ISI
Lecture 6 18
Example of eye pattern:
Binary-PAM, SRRQ pulse …
AWGN (Eb/N0 =10 dB) and ... with ISI:
Bi...