SOPC片上系统仿真验证方法研究

从物理板级验证与RTL代码仿真2个方面介绍了现阶段SOPC的验证方法,重点分析了基于SOPC的RTL仿真处理流程与运行机制,通过搭建SOPC软件仿真平台,完成SOPC片上系统硬件逻辑的功能验证与处理性能评估,最后提供了仿真覆盖率指标,可确保测试验证的充分性。     

基于FPGA的SOPC嵌入式系统设计

简单介绍了SOC发展状况,并针对altera公司FPGA的解决方案SOPC进行重点分析,重点介绍和分析了基于NiosⅡ处理器的关键技术和设计流程以及相关软件。     

雷达信号环境模拟中波形产生单元的设计

针对复杂雷达信号环境模拟系统中对多输出、多调制形式的波形产生单元的迫切需求,综合了以小波变换为基础的脉内调制特征提取技术和以DDS技术为基础的直接数字调制波形合成法,借助于SOPC技术,设计完成了一种新的波形产生单元.     

基于FPGA的多节点无线振动传感器网络的研究

为了实现在军工业、农业、医疗和交通中的远程监控功能,本文设计了基于FPGA的多节点无线振动传感器网络。本系统是在FPGA基础上对SOPC进行软硬件设计,通过FPGA对多个Zig Bee网络节点进行数据采集与控制,能够使振动传感器的数据传输到上位机。经试验验证,本系统的测量精度高、灵敏度线性度好,具有广阔的应用前景。     

基于SOPC技术的高速盘阵记录器设计

硬盘冗余阵列RAID盘阵通常是由商用RAID卡或操作系统管理的软RAID实现的,这种模式的RAID存储带宽受系统共享总线和操作系统的非实时性限制,且依赖于商用主板,整机的性能和可靠性都有一定的缺陷。介绍基于可编程片上系统SOPC技术实现硬盘控制器、RAID 5管理、嵌入式文件系统和通用串行总线USB接口等技术的高速记录器方案。记录器脱离了通用总线架构,最大限度地提升了硬盘阵列的整体性能和可靠性。整个数据流的传输和处理都不需要主机CPU参与,因此对操作系统的实时性没有任何要求。研制完成的样机可以实现高达400MB/s数据率的持续记录或重放,能够满足各种应用中高带宽实时数据录放的要求。     

便携式EDA/SOPC实验箱的开发与应用

本文介绍了我们所开发的一款便携式EDA/SOPC实验箱,该实验箱具有性价比高、体积小、便于携带、可靠性高、使用方便等特点。并给出了实验箱在电子学课程设计中的应用实例,通过试点应用收到很好效果。可推广到与EDA技术相关课程中,使学生更好地掌握这项新技术。     

基于插件技术构建电子对抗辅助计算系统

基于插件技术构建的应用系统具有良好的可扩充性、可定制性和可维护性.阐述了插件技术原理,并在此基础上构建了基于插件技术的电子对抗辅助计算系统.实例证明该系统能够满足各层各类指挥所的个性化要求.     

基于双星系统的单向授时技术研究

授时技术在许领域都有重要应用。基于对授时技术和双星系统的分析 ,在文中给出了基于双星系统的卫星单向授时方案 ,并进行了误差分析。根据双星系统的误差预算 ,本方案的授时精度可达 30 ns。此外 ,还进一步归纳了通用授时技术对双星系统的要求。     

基于并行测试技术的地面测控系统自检方法

为了提高地面测控系统自检的测试效率,提出并实现了一种基于并行测试技术的系统信号回环自检测试方法.将地面测控系统的所有对外接口信号通过回环测试电缆接入到系统内部的故障诊断计算机上,在对所有接口信号进行分析、归类的基础上,利用故障诊断计算机现有硬件资源,有针对性地提出了信号自检测试方法,并设计了基于并行测试技术的系统自检测...     

无线远程数据采集系统设计

本文设计并实现了基于三层网络结构的远程无线数据采集系统。该系统集数据采集技术、嵌入式系统、无线网络、数据库技术及互联网于一体,采用自定义网络协议,以单片机作为前端数据采集核心,通过2.4 G无线传输,应用数据库及互联网技术,实现了基于互联网络中任一终端经确认许可可以访问数据采集节点任一传感器信息。     

TH230无线数传电台工作原理及应用

ＴＨ２３０是集成无线和数传专业技术，用于数据传输、无线遥控的多功能电台。介绍ＴＨ２３０专业无线电台的工作原理及其在供配电系统中的应用。     

Frequency management and SETI: threats to SETI observations in the 1–3 GHz band

The nature of a SETI search makes observations uniquely vulnerable to radio frequency interference because the frequency of a possible ETI signal is unknown. Sensitive radio telescopes, sophisticated software and enhanced signal detection equipment are employed to detect faint signals in the 1–3 GHz frequency range. Frequency management at SETI occurs within a policy environment of the ITU spectrum allocation process. Increased demand by commercial satellite services for access to spectrum adjacent to bandwidth allocated to radio astronomy creates severe international and domestic pressures on SETI observations. Strategies for addressing the RFI problem at the international level will be discussed that include a contingency ITU allocation plan for exclusive use of a particular frequency range by SETI in the event a signal is detected. The lunar farside is, by international agreement, a radio quiet zone for use by radio astronomers. Protected from most human-generated emissions, a SETI radio telescope array on the lunar farside would provide reliable data with minimum interference.     

Functional restrictions on the orientation of onboard and ground methods in the RadioAstron project

In this paper, functional restrictions on the orientation of the onboard systems of the space radio telescope, stations of scientific data receiving and ground radio telescopes in the RadioAstron project are considered. Restrictions important for practical problems of scheduling observations with ground-space radio interferometer are discussed in detail. An algorithm for calculating the angles of the narrow-beam antenna drive, which takes into account technological restrictions on the capability of its spatial orientation, is presented.     

无线电引信的电磁脉冲效应

强电磁脉冲对武器装备电子系统具有很强的干扰和破坏作用。通过超宽带电磁脉冲对无线电引信的辐照实验,研究了无线电引信在超宽带电磁脉冲作用下的效应。实验表明：无线电引信在超宽带电磁脉冲照射下,会产生早炸现象。在介绍无线电引信工作原理的基础上,分析了无线电引信产生早炸的原因,得出超宽带电磁脉冲直接作用无线电引信点火电路从而引起旱炸的结论。     

GPS接收机基带信号处理模块的FPGA实现

论述在GPS接收机三个功能模块中基带信号处理模块的具体作用。利用FPGA技术的先进性和软件无线电技术的灵活性开发出具有自主知识产权的功能模块。介绍其设计实现,着重于伪码生成器和NCO的实现,同时给出相关的仿真结果。     

System of maintaining the thermal regime of a space radio telescope

We present the results of developing a system of thermal regime maintenance for the onboard complex of scientific instruments of the space radio telescope installed on the Spektr-R spacecraft. The structure of the system of thermal regime maintenance is presented that includes a set of autonomous systems of constructive elements of the radio telescope. Basic schemes and composition of aggregates are presented, and main principles of operation of the autonomous systems supporting the thermal regime of the radio telescope are considered.     

Investigation of Long-Wave Radio Bursts from Interball-1 Satellite Observations

Long-wave radio bursts recorded on the Interball-1 satellite in the frequency band 100–1500 kHz are analyzed. The events distinguished by large amplitude radio emission fluxes were selected. These bursts were identified with powerful solar flares, during which time fluxes of hard X-ray radiation, meter-wave radio bursts (types II and IV), and coronal transients were observed. Temporal profiles of the bursts are characterized by a quick drift in frequency and are typical for bursts of III and SA types. The instant of long-wave radio burst generation seems to correspond to the expansion phase of a flare.     

Space missions for SETI.

Radio Telescopes for SETI searches are less demanding than general purpose astronomical radio telescopes. This provides an opportunity to exploit economical approaches in designing SETI systems. Radio Telescopes in low Earth orbit offer no discernible advantages to SETI; indeed, they probably would perform more poorly than a telescope in any other location. Telescopes in geosynchronous orbits would be sufficiently far from Earth to mitigate greatly the deleterious effect of human radio transmissions. Telescopes on the far side of the moon would be superb both from a radio interference standpoint, and from a civil engineering standpoint. Single-reflector telescopes as large as 50 kilometers in diameter could be constructed with conventional materials. However, their costs appear prohibitive. The asteroid belt and the outer solar system are unpromising places to place a large radio telescope. Perhaps the ultimate radio telescope would utilize the sun as a gravitational lens, focusing radiation on free-flying 10-meter class or possibly larger radio telescopes located at distances of the order of 1000 A.U. from the sun. Such a combination has an energy collecting area at 10 centimeters wavelength equivalent to that of a radio telescope about 11 kilometers in diameter, or of the order of 3000 Arecibo radio telescopes. Such a system could detect transmitters with EIRP of the order of a gigawatt at a distance of the order of the distance to the galactic center.     

可重构自适应无线电引信干扰技术研究

根据无线电引信的工作特点,提出了可重构自适应无线电引信干扰技术。设计了自适应无线电引信干扰技术方案,分析了无线电引信信号调制识别技术。对该技术的应用前景进行了展望。     

战术导弹发动机无线电干扰滤波器可靠性验证试验

战术导弹发动机无线电子干扰滤波器是确保导弹发动机战勤安全的一个重要电子产品。为了评价它的可靠性，需对其进行可靠性验证试验。据此，结合一种导弹发动机无线电干扰滤波器的可靠性验证试验，讨论了其可靠性验证试验的数学模型，试验方案设计和试验方面的有关问题。