搜索结果: 1-15 共查到“光学工程 OFDM Transmission”相关记录17条 . 查询时间(0.312 秒)
Impact of Intra-Channel Fiber Nonlinearity on Reduced- Guard-Interval CO-OFDM Transmission
Coherent communications Fiber optics communications Modulation
2011/5/26
Channel estimation for a reduced-guard-interval (RGI) CO-OFDM system shows a unique dependence on the training symbol design in the presence of intra-channel nonlinearities.Because smaller FFT sizes c...
Real-time IQ Imbalance Compensation for Coherent Optical OFDM Transmission
Fiber optics links and subsystems Coherent communications
2011/5/25
A FPGA-based receiver side (Rx) IQ imbalance compensation scheme for 10.7-Gb/s 16-QAM CO-OFDM transmission is demonstrated in real time. The compensation scheme performs better with the increase of OS...
An Optimal Tone Reservation Method for IM/DD Optical OFDM Transmission in Multimode Fiber
Optimal Tone Reservation Method IM/DD Optical OFDM Transmission Multimode Fiber
2011/5/20
We propose an optimal, yet efficient tone reservation method which enables distortion-free IM/DD optical OFDM transmission with no additional bias. Compared to previous approaches, both spectral and p...
Performance Investigation of Polarization-Multiplexed 16-QAM using All-Optical OFDM Transmission and Digital Coherent Detection
Performance Investigation Polarization-Multiplexed All-Optical OFDM Transmission Digital Coherent Detection
2011/5/20
We generated a 500-Gb/s AO-OFDM signal with DP-16QAM modulating each subcarrier and detected the signal using coherent detection. We investigated the effects of DSP oversampling and receiver bandwidth...
Experimental Demonstration of Adaptive Bit and/or Power Loading for Maximising Real-Time End-to-End Optical OFDM Transmission Performance
Adaptive Bit Real-Time End-to-End Optical OFDM Transmission Performance
2011/5/15
For the first time adaptive bit and/or power loading of real-time, end-to-end optical OFDM transceivers are experimentally demonstrated and compared. Low-complexity power loading only results in a pen...
1-Tb/s Large Girth LDPC-Coded Coherent Optical OFDM Transmission over 1040-km Standard Single-Mode Fiber
Large Girth LDPC-Coded Coherent Optical OFDM Standard Single-Mode Fiber
2011/5/15
We experimentally demonstrate 1-Tb/s CO-OFDM transmission over 1040-km standard single-mode fiber using 50% overhead girth-12 LDPC-coded 16-QAM. More than 4-dB improvement in OSNR sensitivity is achie...
Link-aware Precoding for Nonlinear Optical OFDM Transmission
Fiber optics and optical communications Fiber optics communications Nonlinear optics fibers Modulation Coherent communications
2010/6/9
We show that signal shaping schemes for the reduction of nonlinearities in optical OFDM systemsneedtotakeintoaccountthesignalevolutionalongthedispersivelink.Ratherthanminimiz-ing the transmit PAPR, a ...
End-to-End Real-Time Demonstration of 128-QAM- Encoded Optical OFDM Transmission with a 5.25bit/s/Hz Spectral Efficiency over IMDD Systems
Fiber optic communications Modulation Fibres single mode
2010/6/8
Real-time optical OFDM transceivers with 128-QAM encoding are experimentally demonstrated, for the first time, which enable 5.25Gb/s end-to-end transmission with the highest spectral efficiency of 5.2...
High Symbol Rate OFDM Transmission Technologies
Optical Communications Fibre Optics Links Subsystems
2010/6/8
In this paper we discuss high symbol rate all-optical orthogonal frequency division multiplexing (OFDM), focusing on phase optimisation, optimum symbol rate for dispersion managed systems, and Etherne...
Towards Real-Time Implementation of Optical OFDM Transmission
Coherent communications Fiber optics communication
2010/6/8
We review the progresses made towards real-time implementation of optical OFDM, with emphasis on the needed digital signal processing (DSP). Various OFDM procedures and algorithms are discussed in the...
Spectrally Efficient Direct-Detected Optical OFDM Transmission Using Carrier-Data Timely Multiplexing Technique
Spectrally Efficient Direct-Detected Optical OFDM Transmission Timely Multiplexing Technique
2009/7/17
We timely multiplex the carrier and data symbols for DD-OFDM that improves the spectral efficiency,receiving sensitivity, and tolerances to PMD and optical filtering effects, when compared with the pr...
Experimental Demonstration of Joint SPM Compensation in 44-Gb/s PDM-OFDM Transmission with 16-QAM Subcarrier Modulation
Joint SPM Compensation PDM-OFDM Transmission Subcarrier Modulation
2009/7/14
We report the experimental demonstration of a recently proposed joint self-phase modulation compensation scheme in a single-channel 44-Gb/s polarization-division multiplexed OFDM transmission with 16-...
Coherent OFDM Transmission with High Spectral Efficiency
Coherent OFDM Transmission High Spectral Efficiency
2009/7/14
Coherent OFDM is promising for DWDM transmission with higher spectral efficiency and enables a demonstration of the highest spectral efficiency of 7.0 bit/s/Hz. Optical OFDM technologies to increase a...
Polarization Multiplexed 100 Gbps Direct-Detection OFDM Transmission without MIMO Processing
Polarization Multiplexed Direct-Detection OFDM Transmission MIMO Processing
2009/7/14
We propose a low-overhead method of polarization multiplexing in direct detection OFDM that requires no digital MIMO processing. Using 16QAM and only 31GHz bandwidth, 100 Gbps transmission over 80 km ...
8x66.8-Gbit/s Coherent PDM-OFDM Transmission over 640 km of SSMF at 5.6-bit/s/Hz Spectral Efficiency
PDM-OFDM Transmission SSMF Spectral Efficiency
2008/8/6
8x66.8-Gbit/s DWDM transmission is demonstrated over 640-km SSMF with 9-GHz channel spacing. Employing coherent detected polarization-division-multiplexing OFDM with 16-QAM subcarrier modulation, a re...