基于FPGA的ARINC429通讯系统的设计与实现

ARINC429通讯总线在现代飞行器中得到广泛应用,需要研制与ARINC429通讯相应的测试系统。为了实现飞行器多路ARINC429总线与测试系统外围部件互连（PCI）总线之间的数据通讯,在分析ARINC429通讯协议的基础上,利用现场可编程门阵列（FPGA）芯片实现了独立的四路接收两路发送的ARINC429数据通讯以及系统与上位机的PCI通讯。该系统收发数据灵活、可靠,与传统的DSP加PLX9054加FPGA方案相比,电路简单,板卡体积小,功耗低,解决了飞行器多路ARINC429与测试系统的双向通讯。     

基于FPGA的多接口转换研究与实现

主要研究多路串行数据同时接收/发送,然后汇合成一路串行数据发送/接收的多串口转换技术。使用Verilog语言在FPGA上实现了该方案,分别设计了数据的接收模块、发送模块、缓存模块以及系统的分频模块、延迟模块,实现了多路串行数据在通信速率互不影响的情况下合成一路高速串行数据收发的功能。通过Quartus II仿真和实验测试验证了该设计的可行性。在PC测试中,16路波特率为4 800 bit/s的串行数据,可以以波特率为115 200 bit/s进行聚合,各路数据速率无互相影响,且误码率为0。该设计的优点在于节约硬件开支,达到串口多用的效果,适用于多路数据同时采集的实时监控系统。     

基于FPGA的RMII通讯模块的设计与实现

某鱼雷声自导的硬件系统使用了百兆网络交换机实现DSP之间的互联.交换机在MAC和PHY之间的接口是RMII,但DSP没有相应的外围设备与它匹配.因此必须在FPGA中设计RMH的通讯模块,完成DSP数据格式向RMII数据格式的转化.在设计中将该通讯模块分为发送状态机和接收状态机两部分.每个状态机均包含2个2 kbyte的双口RAM作为乒乓缓冲.双口RAM的一端位宽2 bit作为RMII的数据端口,另一端位宽32 bit作为DSP数据端口.向该端口的指定地址写命令字能够启动数据发送,向指定地址读状态字能够判断是否有数据接收.该通讯模块工作在全双工模式,文中给出了它的一个应用实例.经测试它能够达到收发11 M byte/s以上的速度,并且占用的FPGA硬件资源较少,满足了系统网络通讯的要求.     

基于FPGA的4路HD-SDI光纤传输系统

介绍了一种基于FPGA和高速串行复/分接芯片实现多路高清视频信号无损传输的设计方案.详细描述了4路高清视频信号通过一根光纤实现远距离、无损传输的设计原理——发送端、接收端和硬件设计,以及FPGA模块的调试方法.     

数字化电容层析成像系统没计

基于Xilinx Spartan-3型FPGA芯片,设计了一套数字化电容层析成像数据采集系统.该系统南FPGA构建片内DDS模块,与外部D/A配合,产生激励型号,嵌入于FPGA内部的MCU模块控制多路选通、调节PGA增益并与PC及通讯,FPGA硬线逻辑控制A/D采集并实现数字相敏解调.该系统具有结构灵活、测量精度高以及测量速度快等特点.     

多天线系统中小数倍时延补偿及其FPGA实现

研究多天线系统中2路来自同一信号源、不同时延的信号进行延时补偿的方案和FPGA实现方法.时延补偿由小数倍和整数倍的时延补偿两部分组成,主要采用对超前的数据进行延迟来实现,其中,小数倍时延采用sinc函数延迟滤波器实现,整数倍时延采用D触发器实现.在消除这些延时之后,再控制数据选择器,选择合适的数据输出,实现2路数据的延迟补偿.设计通过MATLAB与FPGA的联合仿真进行了验证.     

基于APU+FPGA的机载视频和通讯总线处理系统设计

针对目前航空电子系统中几种广泛应用的机载通讯总线,设计了一种基于APU+FPGA的机载视频和通讯总线处理系统.以APU主处理器和可编程逻辑器件FPGA为核心,实现了对输入的1路ARINC818视频与内部生成的字符进行叠加后,输出1路ARINC818视频至显示器显示的功能.同时,支持7路RS-422和4路ARINC429总线通讯.另外,系统还对22路输入离散量和7路输入模拟量进行了处理.该系统方案采用低功耗、高性能和高集成度的APU和FPGA器件作为核心处理器,极大地简化了硬件架构,降低了系统功耗,提高了可靠性.该设计已成功运用于某飞机显示控制管理系统.     

基于FPGA的视频与通讯数据融合设计

为实现将时间值、方位值等串口通讯信息叠加进数字视频图像信号的某一固定行中,设计了基于FPGA的通讯数据与数字视频数据的融合系统。采用FPGA程序设计实现串行数据接收与内置FIFO处理,并提取视频数据的某一固定行,进行数据融合,使得通讯数据和视频数据在场信号有效下组合输出。基于FPGA的通讯数据与数字视频数据的融合系统实现了通讯数据与视频数据的融合,试验中通讯数据波特率为230.4kbit/s,视频信号帧频50 Hz,视频数据与通讯数据帧频相同,图像像素为1 024×1 024,通讯数据正确的融合入一场图像的最后一行中,系统工作稳定,工作状态良好。基于FPGA的通讯数据与数字视频数据的融合系统以最简硬件系统实现了通讯数据与数字视频数据的组合输出,满足图像处理及显示系统的要求,具有广泛的工程意义。     

极紫外相机电控单元的设计与实现

为了实现对极紫外相机控制及管理功能,设计并实现了一种基于FPGA的电控单元。该系统以FPGA为核心,经过RS-422接口与信号处理子系统进行通讯,通过LVDS接口接收信号处理子系统发送的科学数据,与CPU之间通过数据总线进行通讯。为了提高电控单元的可靠性,在设计过程中采用了抗辐照设计和交叉备份的冗余设计。通过极紫外相机电控单元的测试和试验验证表明:极紫外相机电控单元的功能和性能满足指标要求,为极紫外相机在轨取得圆满成功的结果起到了重要作用。     

基于有限状态机的QPSK调制系统发送模块FPGA实现

分析了所设计的通信系统发射波形的帧格式,结合有限状态机（Finite State Machine,FS M）的设计思想,在FPGA上实现了通信系统的发送模块,将同步头数据、标志位数据 、相位校正数据、正文数据各部分数据按先后顺序有序发送,实现了模块间的无缝链接,使 系统的数据发送稳定可靠。     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first     

JOURNAL OF ELECTRONICS(CHINA)

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NEXT GENERATION WIRELESS NETWORKS–ESPECIALLY THE USE OF MILLI-MICROWAVE BANDS

The global bandwidth shortage of wireless communications has motivated the exploration of the naillimeter wave （ram-wave） frequency spectrum for the next generation wireless communications. Recent advances in RF CMOS technology and high speed baseband signal processing technologies have enabled tile extensive research and development of turn-wave wireless communications. The multi gigabit per second data rate of ram-wave system will lead to applications in many important scenarios, such as WPAN, WLAN,back-haul for cellular system. And the frequency bands include 28 GHz, 38 GHz, 45GHz, 60GHz, E-BAND and even beyond 100 GHz. The propagation and the imitation of the RF circuits design in these frequency bands make the directional antennas be inevitable for mm-wave communications.