搜索结果: 1-10 共查到“光信息技术 Spectral Efficiency”相关记录10条 . 查询时间(0.11 秒)
100G Transoceanic Length Transmission with High Spectral Efficiency Using Bandwidth Constrained PDM-QPSK
100G Transoceanic Length Transmission High Spectral Efficiency Bandwidth Constrained PDM-QPSK
2011/5/20
We review our recent 100G, high spectral efficiency, transmission experiments over transoceanic and regional distances. Transmitter pre-filtering together with a MAP detection algorithm can significan...
40G Field Trial with 0.8 bits/s/Hz Spectral Efficiency over 6,550 km of Installed Undersea Cable
Undersea Cable Field Trial Spectral Efficiency
2011/5/18
We successfully demonstrated 64x40Gb/s transmission over 6,550km installed undersea cable using SubCom’s 40G transceivers. More than 3.3dB FEC margin for all measured channels was achieved matching ou...
Ultra-High-Spectral-Efficiency Transmission
Fiber optics links subsystems Modulation Optical communications
2010/6/10
We discuss the generation, transmission, and coherent detection of 14-Gbaud polarization-division multiplexed, 16-ary quadrature-amplitude-modulation (16-QAM) signals (112-Gb/s line rate). We attain 6...
A Digital Subcarrier Multiplexing Technique for Increased Spectral Efficiency in Optical Systems Using Direct Detection
Fiber optics optical communications Modulation Multiplexing
2010/6/8
We propose a novel technique that allows direct detection of multicarrier signals without using DSP at the receiver. Performance at 55.5 Gb/s, back-to-back and after 1040 km of dispersion uncompensate...
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...
Transmission of 5x62 Gbit/s DWDM Coherent OFDM with a Spectral Efficiency of 7.2 Bit/s/Hz using Joint 64-QAM and 16-QAM Modulation
Modulation Coherent communications
2010/6/8
Transmission of 5x62 Gbit/s polarization multiplexed coherent OFDM is demonstrated over 80 km SSMF. Using 64-QAM and 16-QAM simultaneously allows reducing the channel spacing and makes a net spectral ...
Interleaving OFDM Signals for Multiple Access with Optical Routing Capability and High Spectral Efficiency
Interleaving OFDM Signals Multiple Acces Optical Routing Capability High Spectral Efficiency
2009/7/16
We propose interleaving of OFDM signals as a scheme for multiple access. By filtering of subbands a routing function is realised. The concept is demonstrated by transmission over 400km SSMF with spect...
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...
Challenges to FDM-QAM coherent transmission with ultrahigh spectral efficiency
FDM-QAM coherent transmission ultrahigh spectral efficiency
2008/7/30
Quadrature amplitude modulation (QAM) is an excellent modulation format for realizing optical communication systems with a high spectral efficiency of much greater that 1 bit/s/Hz. I describe recent p...
Frequency Division Multiplexed 1 Gsymbol/s, 64 QAM Coherent Optical Transmission with a Spectral Efficiency of 8.6 bit/s/Hz
Frequency Division Multiplexed QAM Coherent Optical Transmission Spectral Efficiency
2008/7/30
We have successfully transmitted a three-channel frequency division multiplexed 1-Gsymbol/s, 64 QAM coherent optical signal over 160-km with a 1.4-GHz spacing. The spectral efficiency reaches as high ...