检索结果-南通市图书馆

4.096 Tbit/s multidimensional multiplexing signals transmission over 1000 km few mode fiber

Chinese Optics Letters 2024年第1期22卷 8-13页

作者：张宇王晨王凯辉丁俊杰朱博文沈磊张磊王瑞春闫长鹍刘博余建军 School of Information Science and Technology Fudan UniversityShanghai 200433China Changfei Optical Fiber and Cable Joint Stock Limited Company Wuhan 430073China Nanjing University of Information Science&Technology Nanjing 210000China

We experimentally transmit eight wavelength-division-multiplexing(WDM)channels,16 quadratic-amplitude-modulation(QAM)signals at 32-GBaud,over 1000 km few mode fiber(FMF).In this experiment,we use WDM,mode division multiplexing,and polarization multiplexing for signal *** the multiple-input-multiple-output(MIMO)equalization algorithms,we achieve the total line transmission rate of 4.096 Tbit/*** results prove that the bit error rates(BERs)for the16QAM signals after 1000 km FMF transmission are below the soft-decision forward-error-correction(SD-FEC)threshold of2.4×10^(-2),and the net rate reaches 3.413 Tbit/*** proposed system provides a reference for the future development of high-capacity communication.

关键词： optical fiber communication mode division multiplexing few-mode fiber multiple-input-multiple-output high-capacity transmission long-distance transmission

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A compact MIMO automotive radar using phase-aligned daisy-chain cascading topology and elevation compensation for 2D angle estimation

引用

Science China(Information Sciences) 2023年第6期66卷 222-241页

作者： Rui ZHOU Jixin CHEN Yan HUANG Gang XU Debin HOU Bangjie ZHANG Zekun LI Yu XIANG Wei HONG State Key Laboratory of Millimeter Waves Southeast University Purple Mountain Laboratories 3. MiSic Microelectronics Co. Ltd.

To design a high-performance multiple-input multiple-output(MIMO)automotive radar system with simple hardware architecture, this study presents a daisy-chain cascading design scheme, implementing the two-dimensional(2D)nonuniform antenna array with high-gain antennas for 2D angle estimation. The improvements in the designed radar system are primarily divided into three parts. First, a daisy-chain cascading topology will cause severe phase deviations; hence, we rigorously analyzed the influence of the phase deviations and proposed a low-cost phase-alignment procedure to address this concern. Second, to obtain 2D angular resolution and a longer working range with limited channels, a novel 2D antenna array design principle facilitating the arrangement of high-gain antennas was presented. Third, a new phase compensation procedure was developed to mitigate the deterioration of angular accuracy in the elevation plane. Based on the proposed design scheme, a frequency-modulated continuous-wave(FMCW)radar prototype with two transceiver chips, i.e., six transmitters and eight receivers, was successfully built. The prototype radar system’s performance was tested through an anechoic chamber and outdoor experiments. Consequently,an angular resolution of 3.5° in azimuth and 12.5° in elevation was featured in the anechoic ***, using the 2D conventional beam-forming, the outdoor experiment captured high-resolution 2D angular estimation results, thus demonstrating the superior performance of the designed prototype system.

关键词： frequency-modulated continuous-wave radar prototype FMCW multiple-input-multiple-output MIMO phase-alignment daisy-chained cascading topology 2D antenna design elevation compensation

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Particle filter based stochastic interference cancellation for frequency-selective MIMO channel equalization

引用

Journal of Systems Engineering and Electronics 2007年第3期18卷 476-483页

作者： Yang Tao Hu Bo Guo Xinyue Dept. of Electronics Engineering Fudan Univ. Shanghai 200433 P. R. China

To mitigate the effects of the previous symbol decision errors of a decision-feedback （DF） equalizer on the current decision, a particle filter （PF） based DF equalizer for frequency selective multiple-input-multiple-output （MIMO） channel is proposed. On the basis of the analyses of DF equalization for the MIMO wireless system, it is found that a stochastic interference cancellation （IC） scheme can be employed to prevent the error propagation in a severe space-time interference scenario. This is because the random rather than the deterministic scheme can reduce the probability of an error decision even if an error decision occurs. Besides, the signal-to-interference-plus-noise ratio （SINR） based IC order, which is obtained via pilot, can guarantee the optimality of the cancellation. The bit error rate （BER） performance of the proposed scheme is verified through simulation experiments under different multipath interference environment.

关键词： multiple-input-multiple-output particle filter pilot decision-feedback interference cancellation.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Multi-User Cooperative Diversity for Wireless Local Area Networks

引用

International Journal of Communications, Network and System Sciences 2008年第3期1卷 266-273页

作者： J. CHEN K. DJOUANI Member IEEE LISSI Lab. University Paris 12 France Member IEEE LISSI Lab. University Paris 12 France Member IEEE CEDRIC-CNAM Paris France

In this paper, an idea of using space-time block coding (STBC) in multi-user cooperative diversity has been exploited to improve the performance of the transmission in wireless local area networks. The theoretical and simulation results show that, using STBC approaches can always achieve the better performance than existing techniques without introducing the space-time coding. By analyzing the throughput and frame error ratio (FER) of the two different STBC cooperative schemes, we find the trade-off between throughput and reliability. The location of the relay is crucial to the performance, which supposes a rule for future cross-layer design.

关键词： multiple-input-multiple-output (MIMO) Cooperation Space-time Block Coding (STBC).

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：