Citation
Abstract
In this article, we describe a slot-synchronization algorithm for optical signals transmitted using pulse-position modulation (PPM). This algorithm utilizes PPM symbol decisions in order to generate a slot-timing error signal without the use of guard time around the transmitted laser pulse or synchronization symbols. We derive expressions for the open-loop characteristic curve of the error signal and the closed-loop tracking-error variance of this slot synchronizer for an ideal Poisson photon-counting channel. Simulation results for acquisition as well as tracking under a variety of conditions are presented. Finally, the impact on synchronization performance of implementing the transmitted PPM signal through a repetition code is discussed.
Keywords
optical communications
PPM
decision directed slot synchronization
Details
- Volume
- 42-161
- Published
- May 15, 2005
- Pages
- 1–12
- File Size
- 187.6 KB