基于FPGA的改进型FIR滤波器的实现

利用分布式算法对FIR滤波器的硬件实现进行了探讨,在数乘累加的理论上,对分布式算法的串行、并行和拆分查找表法的FPGA硬件实现方法进行了研究。结合FPGA查找表结构,兼顾资源及运行速度的要求,用拆分查找表的方法设计了16阶8位常系数FIR滤波器,并在Quartus Ⅱ 5.0下进行仿真,仿真结果验证了该算法的有效性和实时性。     

基于MA型分布式算法的高阶FIR滤波器设计及其FPGA实现

针对利用现有分布式算法在FPGA上实现高阶FIR滤波器时,存在资源消耗量过大和运行速度慢等问题,提出一种新型高阶FIR滤波器的FPGA实现方法。首先综合采用多相分解结构、流水线等技术对高阶FIR滤波器进行降阶处理,然后采用提出的基于二输入开关和加法器对的分布式算法结构(MA型DA结构)实现降阶后的FIR滤波器。利用ISE10.1在Xilinx Xc2vp30 7ff896 FPGA开发板上实现了一系列8阶到256阶的串行和并行结构FIR滤波器。实验结果表明,该方法有效地减少了系统的资源消耗,提高了系统的时序性能。     

一种200MHz处理速度的FIR滤波器设计

本文通过对串行分布式算法和并行分布式算法作对比研究,分析了基于并行分布式算法的FIR滤波器速度上的优势,设计出一种新颖的高速并行分布式算法结构,并根据该算法结构实现了一种满足处理速度200MHz,12位31阶FIR数字低通滤波器。     

基于FPGA分布式算法的滤波器设计

研究基于分布式算法的数字滤波器设计方法,介绍了能高效实现固定常数乘法的分布式算法原理,并将分布式算法应用于FIR低通滤波器设计,实现了16阶滤波器的设计和调试.采用了EP3C25F324C8来完成滤波器的设计,其中采用串行加法器将数据进行预相加,将16阶降为8阶,降低了资源占用率并提升了处理速度.使用Matlab编程8阶固定常数系数对应256个值的查找表直接导入到FPGA的ROM中,设计方法具有兼容性,可设计更高阶次的滤波器.通过功能仿真证明,方法可行高效.     

利用改进DA算法FIR滤波器的仿真与实现

针对传统乘法运算在FPGA中占用大量硬件资源的弊端,根据FIR滤波器的线性特性,对串行、并行和改进的分布式算法进行研究,利用改进分布式算法在FPGA上对FIR滤波器进行设计,通过查表法完成FIR滤波器的设计,用改进分布式算法设计了16阶FIR滤波器,并在Quartus II 7.0下进行仿真,仿真结果表明,与传统方法相比,该方法能够有效减少硬件资源的使用。     

基于FPGA流水线分布式算法的FIR滤波器的实现

提出了一种采用现场可编程门阵列器件(FPGA)并利用窗函数法实现线性FIR数字滤波器的设计方案,并以一个十六阶低通FIR数字滤波器电路的实现为例说明了利用Xilinx公司的Virtex-E系列芯片的设计过程。对于在FPGA中实现FIR滤波器的关键———乘加运算,给出了将乘加运算转化为查找表的分布式算法。设计的电路通过软件进行了验证并进行了硬件仿真,结果表明:电路工作正确可靠,能满足设计要求。     

罗兰C前端数字带通滤波器设计与实现

分析了罗兰C信号的特征,并根据信号特征决定选用FIR滤波器,利用MATLAB工具设计了满足滤波要求的高阶数字带通滤波器。详细研究了分布式算法的原理和分布式算法在FPGA上实现FIR数字滤波器的方法。最终采用改进的分布式算法在FPGA上实现了127阶FIR数字带通滤波器。利用实际采集的信号进行仿真和现场测试,结果均显示由该方法设计的滤波器性能良好,方法简单易行,相对于传统的乘累加结构不仅能节省硬件资源,而且可以改善数据处理速度,具有一定的推广价值。     

基于分布式算法的高阶FIR滤波器及其FPGA实现

提出一种新的高阶FIR滤波器的FPGA实现方法。该方法运用多相分解结构对高阶FIR滤波器进行降阶处理,采用改进的分布式算法来实现降阶后的FIR滤波器。设计了一系列阶数从8到1 024的FIR滤波器,通过Quartus II 7.1的综合与仿真,以及在EP2S60F1020C4 FPGA目标器件上的实现结果表明,该方法能够有效地减少硬件资源的使用且满足高速实时性的要求。     

FIR滤波器的FPGA实现及其仿真研究

本文提出了一种采用现场可编程门阵列器件FPGA实现FIR字滤波器硬件电路的方案,该方案基于只读存储器ROM查找表的分布式算法。并以一个十六阶低通FIR数字滤波电路在ALTERA公司的CYCLONE系列FPGA芯片上的实现为例说明了设计过程。所设计电路通过软件验证和硬件仿真,结果表明电路工作正确可靠,满足设计要求,性能优于用DSP和传统方法实现的FIR滤波器。     

基于AHDL的FIR数字滤波器的设计

本文使用查找表作为滤波器的硬件实现算法,采用AHDL和模块化的设计方法,对整个数字滤波器进行多层次功能模块的划分,完成了各个层次模块的设计,并将所有模块进行组合,设计了全局并行有限长脉冲响应（FIR）数字滤波器。     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.