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Experimental demonstration for 40-km fiber and 2-m wireless transmission of 4-Gb/s OOK signals at 100-GHz carrier

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Chinese Optics Letters 2013年第2期11卷 24-26页

作者：汤禅娟李荣玲邵宇丰迟楠余建军董泽 G. K. Chang State Key Lab of ASIC and System Department of Communication Science and EngineeringFudan University The School of ECE Georgia Insititute of TechnologyAtlantaGA 30332USA

We experimentally demonstrate a 4-Gb/s radio-over-fiber （RoF） system with 40-kin fiber and 2-m wireless distance downstream at 100-GHz carrier. To the best of our knowledge, this is for the first time in China to realize optical wireless link at 100 GHz. In this letter, simple intensity modulator with direct detector （IM-DD） modulation is employed and optical power penalty afZer 40-kin single mode fiber （SMF）-28 and 2-m air link is 3.2 dB with bit-error-rate （BER） at 1 × 10- 9.

关键词： OOK RoF Experimental demonstration for 40-km fiber and 2-m wireless transmission of 4-Gb/s OOK signals at 100-GHz carrier

A novel OFDM-CPM modulation scheme and its application in WDM-PON

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Chinese Optics Letters 2010年第9期8卷 894-898页

作者：邵宇丰张俊文方武良邹书敏李欣颖黄博迟楠余思远 Department of Communication Science and Engineering and State Key Lab of ASIC & System Fudan University

A novel scheme to generate, transmit, and receive an optical orthogonal frequency division multiplexing （OFDM） continuous phase modulation （CPM） signal, which is combining minimum shift keying （MSK） coding with OFDM optical modulation, for downlink application in a 4×2.5-Gb/s wavelength division multiplexing （WDM） passive optical access network, is proposed and experimentally validated. We also realize wavelength remodulation for carrying upstream on-off keying （OOK） data to reduce the cost budget at the optical network unit. The experimental results show that the power penalties for the downlink and the uplink data after transmission over 25-km SMF-28 fiber are 0.1 dB and smaller than 0.4 dB, respectively.

关键词： Electrostatic discharge Fiber optic networks Frequency allocation Multiplexing equipment Optical communication Orthogonal frequency division multiplexing Orthogonal functions Phase modulation Wavelength division multiplexing

Analysis of different sub-carrier allocation of M-ary QAM-OFDM downlink in RoF system

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Optoelectronics Letters 2018年第1期14卷 40-43页

作者：邵宇丰陈烙王安蓉赵云杰龙颖季幸平 College of Electronic and Information Engineering Chongqing Three Gorges University Faculty of Engineering Shanghai Polytechnic University

In this paper, the performance of a 60 GHz radio over fiber(Ro F) system with 4/16/64 quadrature amplitude modulation(QAM) orthogonal frequency division multiplexing(OFDM) downstream signals is studied. Delivery of 10 Gbit/s M-ary QAM(MQAM) OFDM signals through the 20-km-long single-mode fiber(SMF) is complicated in terms of intensity modulation and direct detection(IM/DD). Using self-homodyne method, the beating of two independent light waves generating the millimeter-wave at the photodetector can be down-converted to baseband in the electrical domain. Meanwhile, three kinds of sub-carrier arrangement schemes are compared and discussed, and the simulation results show that lower peak-to-average power ratio(PAPR) can be obtained adopting the adjacent scheme. At bit error rate(BER) of 10^(-3), the receiver sensitivity using 4QAM-OFDM sub-carrier signal is almost enhanced by 4 dB and 9 dB compared with those of 16 QAM-OFDM signal and 64 QAM-OFDM signal.

关键词： QAM Analysis of different sub-carrier allocation of M-ary QAM-OFDM downlink in RoF system

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多波长可见光双二进制信号传输性能的研究

上海第二工业大学学报 2017年第2期34卷 123-127页

作者：周越邵宇丰汪志锋李长祥上海第二工业大学计算机与信息工程学院上海201209

搭建了多波长LED可见光通信(Visible Light Communication,VLC)系统,采用了低通滤波器-光双二进制(Low Pass Filter-Optical Duobinary,LDF-ODB)的调制方案,实现了波长为450 nm、550 nm和650 nm的可见光信号10 m的传输距离,并分析了3种可见光信号的传输性能。仿真结果证明了光双二进制调制与解调技术应用于可见光通信系统的可行性。通过比较不同波长VLC系统的Q值、眼图、接收灵敏度等,结果证明:采用450 nm波长收发信号的系统,其接收灵敏度高于应用其余波长的系统;采用550 nm波长收发信号的系统具有最小的接收功率代价值。因此,在实际应用中,当系统接收灵敏度要求较高时,采用450 nm波长收发信号的方案具有优势;若同时兼顾接收功率代价值的影响,建议选择采用550 nm波长收发信号的方案。上述研究结果为VLC系统的调制、解调和多波长的实际应用提供了可参考方案。

关键词：可见光通信光双二进制多波长接收灵敏度接收功率代价

A full-duplex optical access system with hybrid 64/16/4QAM-OFDM downlink

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Optoelectronics Letters 2016年第5期12卷 361-365页

作者：贺超谭泽富邵宇丰蔡黎蒲鹤升朱云乐黄思斯刘毓 Key Laboratory of Signal and Information Processing College of Electronic & Information EngineeringChongqing Three Gorges University

A full-duplex optical passive access scheme is proposed and verified by simulation, in which hybrid 64/16/4-quadrature amplitude modulation(64/16/4QAM) orthogonal frequency division multiplexing(OFDM) optical signal is for downstream transmission and non-return-to-zero(NRZ) optical signal is for upstream transmission. In view of the transmitting and receiving process for downlink optical signal, in-phase/quadrature-phase(I/Q) modulation based on Mach-Zehnder modulator(MZM) and homodyne coherent detection technology are employed, respectively. The simulation results show that the bit error ratio(BER) less than hardware decision forward error correction(HD-FEC) threshold is successfully obtained over transmission path with 20-km-long standard single mode fiber(SSMF) for hybrid downlink modulation OFDM optical signal. In addition, by dividing the system bandwidth into several subchannels consisting of some continuous subcarriers, it is convenient for users to select different channels depending on requirements of communication.

关键词： downlink duplex multiplexing quadrature transmitting modulator bandwidth correction transmitter hardware

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相位噪声补偿新技术

光通信研究 2011年第1期 12-13页

作者：张自然黄博张俊文朱江波邵宇丰黄德修迟楠复旦大学通信科学与工程系专用集成电路与系统国家重点实验室上海200433

文章介绍了两种补偿相位噪声的新技术,分别是补偿激光器相位噪声的数字前馈载波恢复算法和补偿非线性相位噪声的数字反向传播算法。其中数字前馈载波恢复算法能有效地提高能够容忍的激光器线宽;数字反向传播算法减少了非线性噪声,并能... 详细信息

文章介绍了两种补偿相位噪声的新技术,分别是补偿激光器相位噪声的数字前馈载波恢复算法和补偿非线性相位噪声的数字反向传播算法。其中数字前馈载波恢复算法能有效地提高能够容忍的激光器线宽;数字反向传播算法减少了非线性噪声,并能够大幅提高发射功率,以提高信噪比。

关键词：相干检测相位噪声载波同步前馈反向传播

Optical homodyne receiver utilizing image rejection in FSK/ASK re-modulation WDM-PON

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Chinese Optics Letters 2010年第9期8卷 906-908页

作者：方圆刘霄郑曦侯春宁方武良黄博李欣颖邹书敏张俊文邵宇丰迟楠 Department of Communication Science & Engineering State Key Laboratory of ASIC & System Fudan University

Optical frequency shift keying （FSK） homodyne detection utilizing image rejection in FSK/amplitude shift keying （ASK） re-modulation wavelength-division-multiplexed passive optical network （WDM-PON） is proposed and demonstrated. Image rejection is adopted to achieve better performance. We show the result in back-to-back and 40-km distance respectively and apparent improvement is obtained in the latter situation by using image rejection. Several factors which affect the image rejection receiver are analyzed in order to find out the optimum parameters. Result shows that the presented scheme is suitable for super long reach access network, especially for future metro access network.

关键词： Fiber optic networks Frequency shift keying Wavelength division multiplexing

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基于生存性的光纤传送网研究

通信技术 2006年第S1期39卷 160-162页

作者：邵应平邵宇丰长沙市电信规划设计院长沙410001 湖南大学计算机与通信学院长沙410082

重点论述了光纤传送网的优化组建方案,包括业务分布形式设计、网络规划、如何构建生存性的网络等,所涉因素包括市场需求、网络资源配置运行维护管理、技术升级。

关键词：光纤传送网多业务传送平台生存性网络网络规划

上行八进制相移键控信号的零差相干探测光接入新方案

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上海第二工业大学学报 2015年第2期32卷 120-125页

作者：邵宇丰方安乐龚玉梅胡金艳上海第二工业大学计算机与信息工程学院上海201209

不同用户接入终端的出现使得光接入系统中上行链路的通信带宽需求急剧增加,低传输成本、高频带利用率的上行多进制光信号接入成为必然选择。设计了一种上行八进制相移键控信号并进行零差相干探测的新方案。该方案中,在光网络单元中级联... 详细信息

不同用户接入终端的出现使得光接入系统中上行链路的通信带宽需求急剧增加,低传输成本、高频带利用率的上行多进制光信号接入成为必然选择。设计了一种上行八进制相移键控信号并进行零差相干探测的新方案。该方案中,在光网络单元中级联3个相位电光调制器实现了高频带利用率八进制相移键控光信号的产生,在光线路终端中采用下行光信号载波作为混频源结合数字信号处理模块,实现了上行光信号的零差相干探测,相比较只采用相干探测技术的方案其接收机灵敏度值的提高超过了2 d B。

关键词：光接入系统光网络单元光线路终端八进制相移键控零差相干探测