Duobinary Signal Processing Q

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Duobinary Signal Processing QRs --- Why
fractional spaced, or x2 oversampled, and edge
equalization

• Lei Zhang, PhD Candidate
• Electronics Department
• Carleton University

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PRS Systerm Polynomial
1)
2)
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General Partial-Response System Model
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Duobinary Signaling F(D)1D
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Frequency Response of Duobinary Filter
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Impulse Response of Duobinary Filter
Nyquist interval 1.5UI
Filter
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Facing Problems

• Edge equalization needs new algorithm (sign-sign
  LMS?)
• Need multi-phase clock for fractional-spaced
  equalization.

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Reference