Performance analyses of polarization demultiplexing based on constant-modulus algorithm in digital coherent optical receivers
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TLDR
The performance limit of CMA-based polarization demultiplexing through computer simulations is discussed and the method of improving its performance is demonstrated.Abstract:
In the digital coherent optical receiver, we can achieve polarization demultiplexing in the digital domain, using a two-by-two matrix controlled by the constant-modulus algorithm (CMA). In this paper, after elucidating the physics behind CMA for polarization demultiplexing, we discuss the performance limit of CMA-based polarization demultiplexing through computer simulations. The method of improving its performance is also demonstrated.read more
Citations
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References
More filters
Journal ArticleDOI
Self-Recovering Equalization and Carrier Tracking in Two-Dimensional Data Communication Systems
TL;DR: This paper solves the general problem of adaptive channel equalization without resorting to a known training sequence or to conditions of limited distortion.
Journal ArticleDOI
Digital filters for coherent optical receivers.
TL;DR: Using the analytical solution an upper bound on the number of taps required to compensate chromatic dispersion is obtained, with simulation revealing an improved bound of 2.2 taps per 1000ps/nm for 10.7GBaud data.
Journal ArticleDOI
Evaluation of Sensitivity of the Digital Coherent Receiver
Kazuro Kikuchi,S. Tsukamoto +1 more
TL;DR: In this article, the authors investigated the sensitivity of the digital coherent receiver both theoretically and experimentally, and showed that the receiver sensitivity close to the shot-noise limit is achieved in the 10-Gbit/s binary phase-shift keying system with the help of a lownoise optical preamplifier.
Proceedings ArticleDOI
Initial tap setup of constant modulus algorithm for polarization de-multiplexing in optical coherent receivers
TL;DR: In this article, a modified constant modulus algorithm (CMA) was proposed for polarization de-multiplexing and equalization, where the initial tap values for CMA were designed to avoid the degeneration of the two polarization tributaries.
Book ChapterDOI
Coherent Optical Communications: Historical Perspectives and Future Directions
TL;DR: In this paper, the authors describe the principle of operation of coherent detection, the concept of the digital coherent receiver, and its performance evaluation, and the challenges for the future are summarized.