基于SX1212的刚体转动惯量无线数传系统

采用TI公司的低功耗单片机MSP430F149作为MCU,通过SPI接口对SX1212进行参量配置和收发控制,利用串行通讯方式接收转动惯量实验仪的实验数据.     

Phase pre-emphasis technique in real-time AOS-OFDM system

A phase pre-emphasis technique used in an all-optical sampling orthogonal frequency division multiplexing （AOS-OFDM） system is proposed and demonstrated. With the application of this technique, 50-Gb/s AOS-OFDM data are successfully transmitted over 20-km uncompensated single-mode fiber （SMF） with real-time direct-detection. The constructive interference effect between symbols is decreased with this technique.     

基于FPGA的AMC信号处理卡的设计与实现

国内外早期,探测器装置的数据传输系统普遍采用并行总线架构,如VME、PXI总线等。随着核物理实验的发展,数据的传输速度不断提高,并行总线难以提速的弊端逐渐显现,总线速度不够导致数据无法通过背板传输。本工作采用基于MicroTCA(Micro Telecom Computing Architecture)架构设计一种新型先进的数据传输AMC(Advanced Mezzanine Card)信号处理卡。该AMC信号处理卡的背板总线使用在速度提升方面有着巨大优势的高速PCIe串行总线。通过测试验证,整个传输链路传输功能正确,链路传输的光纤误码率低于7.62×10^-15,传输速度也接近理论的极值,达到了430 MB/s。最后,该AMC信号处理卡与前端电子学进行了联测,验证了系统的正确性。     

加权复杂网络的交通动力学研究

运用局域边权信息的路由搜索策略对以BBV模型生成的通讯网络的数据传输进行了研究。通过大量的数值仿真表明,当β=1.2时,网络具有最大的通讯能力、最小的信息平均传输时间和最小的网络负载。此研究对于实际通讯网络中路由搜索协议的设计具有一定的意义。     

Orthogonal M-ary code shift keying spread spectrum underwater acoustic communication

M-ary and code shift keying（CSK）spread spectrum is generally applied to overcoming the spreading gain versus data rate limitation in underwater acoustic（UWA）communications.In addition,the concept of orthogonal M-ary CSK is introduced to UWA communication to gain higher rates.We propose a scheme employing dual-orthogonal-channel M-ary and CSK spread spectrum UWA communication based on Gold sequences owing large code set and good self and cross correlation.The modulation and demodulation scheme of the orthogonal M-ary CSK is derived algebraically and the factors critical to its performance are discussed.Furthermore,its bit error rate（BER）curve is evaluated via simulations and compared with the dual-channel M-ary CSK.Finally,the validity of the simulations is verified in tank experiments.1096.8 bps data rate of the proposed communication scheme is realized for 10 kbits data volume with no error.Overall through deduction,numerical simulation,and experiment,it is shown that the proposed method offers significantly improved performance.     

A penetrable interactive 3D display based on motion recognition (Invited Paper)

Based on light field reconstruction and motion recognition technique,a penetrable interactive floating 3D display system is proposed.The system consists of a high-frame-rate projector,a flat directional diffusing screen,a high-speed data transmission module,and a Kinect somatosensory device.The floating occlusioncorrect 3D image could rotate around some axis at different speeds according to user’s hand motion.Eight motion directions and speed are detected accurately,and the prototype system operates efficiently with a recognition accuracy of 90%on average.     

Applied Techniques for High Bandwidth Data Transfers across Wide Area Networks

Large distributed systems such as Computational/Data Grids require large amounts of data to be co-located with the computing facilities for processing.From our work develogpin a scalable distributed network cache.we have gained experience with techniques necessary to achieve high data throughput over high bandwidth Wide Area Networks(WAN).In this paper,we discuss several hardware and software dsign techniques,and then describe their application to an implementation of an enhanced FTP protocol called GridFTP,We describe results from the Supercomputing 2000 conference.     

基于Java APplet的Internet地图服务平台设计

;主要论述了网络环境下建立地图服务平台的设计思路与结构设计.在此基础上对矢量地图数据基本流程做了详细的论述,其中主要包括数据获取、数据压缩、数据传输、数据表达与空间查询等.基于Java语言.论文从底层实现了基于socket协议连接的服务器端与客户端地图数据的组织、传输与数据可视化表达,实现了网络地图发布平台.论文主要讨论了Java环境下具体地图服务平台设计.     

分布式计算机实时数据传输板的设计与实现

从军用光电系统实时数据传输的需求出发,提出了基于VxWorks实时操作系统PCI总线双机数据传输板的设计方案.经测试,数据传输速率达到94 MB/s,能够满足军用光电系统实时数据传输要求.