2 May 1994 Suboptimum bit synchronization in high-speed communications
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In this communication we consider the use of a phase-locked loop with signal injection (PLLI) in clock synchronization circuits. We show that by exploring the correlation between the I (in- phase) and Q (quadrature) components of the disturbance, the PLLI allows significant improvements in the output jitter. Numerical results are given for optical communications with RZ signaling which show considerable improvements relatively to a conventional PLL. Experimental measurements obtained with a Colpitts VCO designed to allow current injection are presented that demonstrate the effectiveness of the PLLI in exploring the I-Q correlation.
© (1994) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Atilio M. S. Gameiro, J. Nuno Matos, "Suboptimum bit synchronization in high-speed communications", Proc. SPIE 2149, Technologies for Optical Fiber Communications, (2 May 1994); doi: 10.1117/12.175256; https://doi.org/10.1117/12.175256

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