The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
We present a novel timing recovery scheme based on a Gardner phase detector performing excellently in spectrally efficient Nyquist coherent optical systems. Good clock tone performance is obtained for QAM modulation formats and roll-off factor (ROF) values close to 0.
We present performance improvements in nonlinear regime of long-haul transmission systems. In several transmission scenarios based on offline data MLSE, simplified BP, modified NPCC, carrier recovery optimization and combinations thereof show improvement up to 1.8dB.
Deviations away from ideal AWGN statistics degrading FEC performance are demonstrated caused by the nonlinear optical channel and by receiver-side DSP. An according noise model is demonstrated for FEC test and optimization.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.