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.
Phase modulation is used in DCO-OFDM for visible light communications, whereby around 10 dB PAPR reduction is achieved. Considering the nonlinearity of LED emitters, our proposed method achieves better BER performance than that of conventional DCO-OFDM.
We demonstrate that DCTs-OFDM has the similar BER performance with traditional OFDM in VLC, while effectively improves the transmission distance by 20% due to less PAPR and SNR-BER performance about 1dB in multipath interference environment.
In this paper, a novel undersampled pulse amplitude modulation with subcarrier modulation (UPAMSM) is proposed to supporting high efficiency non-flickering visible light camera communication (CamCom). A post-compensation technique is employed to reduce nonlinear effects caused by camera gamma correction. In order to eliminate phase uncertainty between transmitter and camera, and obtain the built-in...
We experimentally verified the effectiveness of a novel digital pre-emphasis technique to compensate limited DAC bandwidth for next generation flexible systems. A gain larger than 1dB/0.1nm OSNR at the 7%-FEC limit has been experimentally verified for 8, 16 and 32QAM.
In this paper, we present recent research on silicon nanowires for ultra-fast and ultra-broadband optical signal processing at DTU Fotonik. The advantages and limitations of using silicon nanowires for optical signal processing are revealed through experimental demonstrations of various optical signal processing.
Single wavelength 56Gbps transmission in 640km dispersion-unmanaged link is successfully realized by using direct-detection discrete multi-tone (DMT) modulation method. A single polarization IQ modulator is used to do chromatic dispersion pre-compensation and generate single sideband (SSB) DMT signal. Just one PIN is used to detect the received signal to reduce the cost. More than 3000ps/nm chromatic...
We review recent single-carrier 400G schemes based on high baud rate signals with different spectrum efficiency (SE) based on QPSK and 16QAM. The long-haul performances under different transmission conditions and modulation formats are studied. The digital signal processing for 400G signal recovery is also discussed.
We demonstrate 10×200 Gb/s real-time transmission over 5 types of fiber with flex-grid PDM-16QAM systems. Performance of different fiber is compared and more than 2000km transmission over ULL and EX2000 is achieved with EDFA only.
A TCM-based WDM-PON using a single RSOA is proposed to improve the cost-effectiveness in highly asymmetric traffic conditions and its feasibility is experimentally demonstrated. It reduces component count and increases sensitivity for downstream signals, yet meets the bandwidth requirement.
We demonstrate a record 38.4Tb/s 64QAM C-band transmission over 762km of field deployed SSMF fiber, connecting Lyon and Marseille, France, employing hybrid EDFA-Raman amplification and achieve a spectral efficiency of 8b/s/Hz. Furthermore, we demonstrate, for the first time to our knowledge, flexi-rate transmission over the same commercial link, using quad-carrier 1Tb/s 16QAM (24.0 Tb/s), 1Tb/s 32QAM...
We propose a non-imaging MIMO-OFDM based VLC, and analyzed its bit-error-rate (BER) performance for different LED arrangements. Rectangular LED arrangement offers improved BER compared to the linear arrangement for a range of higher-order modulation schemes.
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.