搜索结果: 1-15 共查到“光信息技术 Optical OFDM”相关记录26条 . 查询时间(0.076 秒)
Channel Estimation Using Superimposed Training for Coherent Optical OFDM Systems
Channel Estimation Superimposed Training Optical OFDM Systems
2016/12/2
We demonstrate by simulation that the superimposed training based channel estimation scheme can achieve similar performance as compared with conventional schemes, without any loss in bandwidth. An ite...
Characterization and Monitoring of Laser Linewidths in Coherent Optical OFDM Systems
Fiber optics communications Modulation
2015/5/26
We demonstrate monitoring of digitally-generated laser linewidths for 107-Gb/s coherent optical OFDM systems. Unique characteristics of time-domain phase-error variance are exploited to extract laser ...
Integrated-optic demultiplexers for optical OFDM signals
Integrated optics devices Optical communications
2015/5/26
We review recent progress on our integrated-optic OFDM demultiplexers fabricated with silica PLC technology. We detail the configuration, operating principle, and characteristics of the demultiplexers...
Constant Envelope Optical OFDM for Improved Nonlinear and Phase Noise Tolerance
Fiber optics communication Phase Modulation
2015/5/25
We introduce a new concept of OFDM transmission with constant envelope and coherent detection to reduce the sensitivity of OFDM signals to nonlinear effects and phase noise.
Real-time IQ Imbalance Compensation for Coherent Optical OFDM Transmission
Fiber optics links and subsystems Coherent communications
2015/5/25
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...
Real-Time Optical OFDM Transceivers for PON Applications
Fibre Optical Communications Modulation Fibres single mode
2015/5/25
Recent real-time optical OFDM (OOFDM) research progress is reviewed extensively in terms of adaptive transceiver design, intensity modulators, synchronisation techniques and network architectures. Res...
Experimental Study of Polarization-Switched-QPSK Subcarrier Modulation and Iterative Demapping on Optical OFDM Systems
multiplex achieved OCIS codes
2015/5/21
We demonstrate application of polarization-switched-QPSK subcarrier modulation together with soft-FEC LDPC coding and iterative demapping on OFDM lab system. 4.5dB OSNR-sensitivity improvement versus ...
Realization of a 23.9 Gb/s Real Time Optical-OFDM Transmitter with a 1024 Point IFFT
Realization Optical-OFDM Transmitter Point IFFT
2015/5/20
We report a FPGA-based real time 23.9-Gb/s CO-OFDM transmitter with IQ-mixing with a 1024 point FFT, the largest FFT-size reported to date. For a BER of 10 -3 a required OSNR of 10.8 dB is measured.
First Experimental Demonstration of Low-Cost VCSEL- Intensity Modulated End-to-End Real-Time Optical OFDM Signal Transmission at 11.25Gb/s over 25km SSMFs
VCSEL Intensity Modulated OFDM Signal Transmission
2015/5/20
Low-cost, narrow modulation bandwidth, un-cooled VCSELs can be utilized to directly modulate 64-QAM-encoded 11.25Gb/s signals for end-to-end real-time optical OFDM transmission over 25km SSMF IMDD sys...
Statistical Investigations of Optical OFDM Adaptive Loading Algorithm over 1000 Worst-Case MMFs
Optical OFDM Adaptive Loading Algorithm MMFs Statistical Investigations
2015/5/18
Bit-and-power-loading(BPL) [power-loading (PL)] offers the best (worst) performance.For MMFs of <300m PL is effective for escalating an optical OFDM MMF link performance to its maximum potential; for ...
This paper presents a study on the energy efficiency of adaptive optical OFDM in data center’s networks. The DSP architecture of the proposed scheme is targeted to an FPGA and achieves more than 70% l...
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
2015/5/15
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...
A new networking approach based on IP/optical OFDM technologies is proposed,providing an adaptive mechanism of bandwidth provisioning and pipe resizing for dynamic traffic flows. A comparison study is...
Link-aware Precoding for Nonlinear Optical OFDM Transmission
Fiber optics and optical communications Fiber optics communications Nonlinear optics fibers Modulation Coherent communications
2015/6/9
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
2015/6/8
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...