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.
The roles of ADC ENOB and AGC clipping effect are investigated in coherent QAM optical transmission system by experiments and simulations, under different transmission effects. Potential implementation risks and optimization for AGC and ADC are presented.
We investigate the performance of linear equalization combined with MLSE in long-haul transmission. In the nonlinear regime with high launch powers Q-factor improvement up to 1.4 dB is demonstrated with a quaternary state model.
Communication systems are designed to provide reliable transmission of information and to cope with various channel imperfections. The amplitude of the received signal is attenuated depending on length and type of the transmission channel. Usually, automatic gain control is placed before the clock recovery in the receiver to combat signal power/swing variations. Optical channel impairments caused...
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.