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Optical orthogonal frequency division multiplexing for high-speed, long-haul optical transmission systems is reviewed. Some important aspects of the systems are discussed and demonstrations of high-speed transmission up to 122 Gbit/s are presented.
We show numerical simulation results of three different timing synchronization methods in Optical Orthogonal Frequency Division Multiplexing (OOFDM) system using Intensity-Modulation and Direct-Detection (IM/DD) in Multi-Mode Fiber (MMF) channel and do comparative study of the three algorithms. Based on Park's algorithm, we present a modification to it that can obtain higher time estimation accuracy...
We propose a cost-efficient method of multiple receiver optical OFDM system that reduces the ADC requirement and FFT size of receiving. Aided by signal predistortion, aliasing free signal can be retrieved independently and directly at the low bandwidth receivers. Simulation and experiment results are given.
Multiple channels of ADCs for high bit rate CO-OFDM system is proposed by jointly processing outputs of all channels with a simple algorithm. The required sampling rate of ADCs is reduced lower than Nyquist rate.
Even though OFDM is a well established modulation format in the wireless community, it is relatively new in fibe-roptics. In this paper we give an overview of the past, present and future of optical OFDM for long-haul fiber-optic transmission systems and discuss several application spaces for the commercialization of optical OFDM.
Wavelet transform based OFDM is proposed to increase the dispersion tolerance of optical OFDM. For moderate accumulated dispersion the performance is shown to be comparable with Fourier transform based optical OFDM with 10% cyclic prefix.
During the last two years, numerous researchers have dedicated their work in optical OFDM and, consequently, the number of papers has grown exponentially. In this paper we evaluate the suitability of OFDM for long-haul 100GbE applications.
In the last two years the number of optical OFDM papers has grown exponentially, but is this modulation format really a viable candidate for next generation fiber-optic transmission systems? In this paper we review the most significant technologies and aim to evaluate the potential of OFDM for 100 GbE applications.
The use of optical OFDM in fibre links also carrying NRZ channels is investigated. Simulations show little penalty on the OFDM channels if the NRZ power is less than 2 dB greater than the OFDM power.
In this paper, KDDIpsilas vision and strategy for realizing so-called next generation network is presented. We announced ldquoultra 3Grdquo concept as a fixed-mobile converged network, which is built through a natural migration/extension process rather than building brand new NGN system. Our ldquoultra 3Grdquo network will enable customers to enjoy the real FMBC services, such as the high speed data...
We review coherent-optical orthogonal frequency division multiplexing (OFDM) for long-haul optical transmission systems. Two important aspects of such systems are reviewed: RF-aided phase noise compensation and polarization division multiplexing enabled by MIMO processing.
Network enabling technologies and architectures design for delivering super-broadband wireless services at >1 Gb/s over optical access networks are reviewed. Cost-efficient optical mm-wave generation and transmission technology, optical OFDM, and hierarchical architecture for high-mobility access are discussed.
Clipping-aided precoding is suggested for effective PAPR reduction to improve performance of OFDM. Up to 3.7 dB PAPR reduction is shown. Performance improvements in required OSNR and dispersion tolerance are demonstrated on compatible SSB.
110 Gbit/s optical orthogonal frequency division multiplexing (OFDM) transmission is demonstrated over 80 km ITU-T G.652 singlemode fibre (SMF) without dispersion compensation. The optical OFDM signal is generated by a novel electro-optic subcarrier multiplexing technique that combines a two-carrier modulation scheme with an optical multi-carrier light source.
A number of different forms of Orthogonal Frequency Division Multiplexing (OFDM) have recently been developed for application in a range of optical systems. In this presentation the key differences between these are explained. Analytical techniques developed for conventional optical modulation formats cannot always be applied successfully to optical OFDM. For example, in calculating the effect of...
This paper reviews the key requirements for the high-capacity optical transmission that supports the exponential growth of global IP traffic. The requirements include total data rate, transmission distance, flexibility, reliability, and cost.
We identify experimentally the effects of laser linewidth and intensity noise on optical OFDM systems, and show that commercial DFB lasers are suitable transmitters even when operated at low powers.
Optical orthogonal frequency division multiplexing (OFDM) is a type of electronic dispersion and nonlinearity compensation that is scalable to extremely-high data rates, offering plug-and-play convenience in free-space, multimode and long-haul communication systems.
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