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国家高技术研究发展计划(2012AA011302)

作品数:10 被引量:23H指数:2
相关作者:黄善国顾畹仪张杰赵永利鞠卫国更多>>
相关机构:北京邮电大学北京大学国家电网公司信息通信分公司更多>>
发文基金:国家高技术研究发展计划国家自然科学基金国家重点基础研究发展计划更多>>
相关领域:电子电信自动化与计算机技术理学机械工程更多>>

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10 条 记 录,以下是 1-10
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Simultaneous format conversion of parallel multichannel based on FWM in symmetric highly nonlinear fiber loop
2014年
A parallel multichannel format conversion scheme for elastic optical networking based on four wave mixing (FWM) in symmetric highly nonlinear fiber loop (S-HNLF-L) is proposed and the performance is evaluated and discussed. Parallel four channels format conversion from quadrature phase shift keying (QPSK) to binary phase shift keying (BPSK) signals at 40 Gb/s is theoretically analyzed and simulated. The results are helpful for the format-adaptive elastic optical networks.
展月英张民刘卓陈雪
灵活栅格光网络中一种新型TV-RSA算法
2015年
针对灵活栅格光网络中时变业务的路由和频谱分配问题,提出了面向流量均衡的最优最短路的路由和频谱分配算法。通过灵活的频谱扩展收缩策略指导频谱的分配,同时借助流量均衡的路由分配策略,使得网络中相邻的光通路在不同时刻共享部分频谱资源,以提高频谱的利用效率。
鞠卫国张云帆朱晨鸣黄善国顾畹仪
Improving performance of 750-Mb/s visible light communication system using adaptive Nyquist windowing被引量:1
2013年
We propose a configuration of a wavelength division multiplexing (WDM)-visible light communication (VLC) system using orthogonal frequency division multiplexing (OFDM) modulation and an adaptive Nyquist windowing of the OFDM signal in the receiver. Based on this configuration, we demonstrate a 750-Mb/s WDM-VLC transmission based on RGB light-emitting diode (LED) with a distance of 70 cm. The measured bit error rate (BER) for all channels are under the pre-forwaxd error correction limit of 3,8 × 10-3. The BER performances of all the channels of the proposed WDM-VLC system show considerable improvement compared with those of the system without Nvauist windowing.
李荣玲王源泉汤婵娟王一光商慧亮迟楠
Flattened optical frequency-locked multi-carrier generation by cascading one directly modulated laser and one phase modulator
2013年
We propose a novel scheme for optical frequency-locked multi-carrier generation based on a directly modu- lated laser (DML) and a phase modulator (PM) in cascade through synchronous sinusoidal radio frequency (RF) signal. The optimal operating zone for the cascaded DML and PM scheme is determined via theoreti- cal analysis and numerical simulation. We demonstrate 16 optical subcarriers can be successfully generated based on the cascaded DML and PM scheme in the optimal zone. The generated 16 optical subcarries have frequency spacing of 12.5 GHz and power difference of less than 3 dB. These results agree well with those of the numerical simulation. We also demonstrate intensity modulation and direct detection (IM-DD) based on one of the 16 generated optical subcarriers. After 20-km single-mode fiber-28 (SMF-28) transmission, the bit-error ratio (BER) of 1×10^-9 can be attained for both 3.125- and 12.5-Gb/s bit rates.
余建国李欣颖余建军迟楠
Modular Multiplier by Folding Barrett Modular Reduction
Modular multipliers of medium or small sizes can be implemented by Barrett modular reduction algorithm.In this...
Tao WuShu-Guo LiLi-Lian Liu
Experimental demonstration of multigranularity switching between optical DFT-spread-OFDM and Nyquist superchannel被引量:1
2014年
We experimentally investigate multigranularity optical subband switching functionality between two superchannels with slight error vector magnitude penalty. One is 4×39 Gb/s polarization-division-multiplexed(PDM) quadrature phase shift keying discrete Fourier transform spread orthogonal frequency division multiplexing(DFT-spread-OFDM) superchannel with 12.5 GHz band spacing. The other is 8×29 Gb/s PDM-16-quadrature amplitude modulation Nyquist pulse shaping superchannel with 6.25 GHz band spacing. To the best of our knowledge, this is the first time that optical switching functionality for individual band between different superchannels with multigranularity is realized.
丁瑞张婷婷张帆
基于路径计算单元的光网络故障恢复中的并行流量迁移被引量:2
2013年
基于路径计算单元的光网络,根据无充足空闲资源用于无需流量迁移状态的恢复光路建立的背景,围绕故障恢复时尽量减少被中断连接的流量迁移过程,对并行的流量迁移过程进行了研究,建立了相应的数学模型,提出了并行流量迁移的实现方法,给出了可以得到并行流量迁移过程中连接新旧光路拆建顺序的启发式算法.文中提出的最小化最大中断连接资源需求数并行流量迁移算法包含依赖关系图分割算法和最小化最大中断连接资源需求数拆建顺序确定算法两大部分.仿真证明了最小化最大中断连接资源需求数并行流量迁移算法相对于普通串行流量迁移算法可以利用较少的额外中断得到迁移时间的大幅缩短.
张引卢建国黄善国李新张民赵永利张杰顾畹仪
关键词:光网络故障恢复
Joint nonlinear electrical equalization in coherent optical PDM DFT-spread-OFDM systems被引量:1
2013年
We propose a joint nonlinear electrical equalization approach in coherent optical discrete-Fourier-transform spread orthogonal-frequency-division-multiplexing (DFT-sprea^-OFDM) systems with polarization divi- sion multiplexing (PDM). This method is based on an adaptive Volterra series expansion for nonlinear distortions of two orthogonal polarizations. The nonlinear electrical equalization is validated through numerical simulation of 100-Gb/s quadrature phase shift keying and 200-Gb/s 16 quadrature amplitude modulation PDM DFT-spread-OFDM systems.
黄志远张帆陈章渊
关键词:MULTIPLEXING
一种基于有序二元决策图和布尔函数性质计算网络可靠性的算法被引量:5
2014年
有序二元决策图(OBDD)被广泛用到网络可靠度的计算中,在基于OBDD计算网络可靠度时,其计算时间主要取决于参与操作的OBDD的大小,而OBDD的大小严重依赖于OBDD的变量序。该文根据布尔函数的性质和OBDD原理提出一种优化计算网络可靠性的算法(BF-OBDD),提高计算网络可靠性的效率。实验结果表明改进的算法有较少的OBDD节点数量,在计算网络可靠性时,花费的时间较少。
熊飞乔迪王宏祥赵子岩杨洪沈亮
关键词:计算机网络可靠性网络拓扑图布尔函数
63-Tb/s(368×183.3-Gb/s) C- and L-band all-Raman transmission over 160-km SSMF using PDM-OFDM-16QAM modulation被引量:2
2014年
By using PDM-OFDM-16QAM modulation, all-Raman amplification, coherent detection, and 7% forward error correction (FEC) threshold, we successfully demonstrate 63-Tb/s (368× 183.3-Gb/s) signal over 160- km standard single mode fiber (SSMF) transmission in the C- and L-bands with 25-GHz channel spacing. 368 optical channels with bandwidth spacing of 25 GHz are generated from 16 external cavity laser sources. After 160-km SSMF transmission, all tested bit error rate (BER) are under 3.8×10^-3, which can be recovered by 7% FEC threshold. Within each channel, we achieve the spectral efficiency of 6.85 bit/s/Hz in C/L band.
李超罗鸣肖潇李婕贺志学杨奇杨铸余少华
关键词:TB/SPDMOVER
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