基于FPGA分布式算法的FIR滤波器的实现

提出了一种在FPGA器件上实现流水线并行分布式算法的FIR滤波器结构。首先在理论上论证了此结构滤波器的实现方法以及可行性,然后给出了硬件具体实现模块。最后通过FPGA仿真验证,证明了用FPGA实现数字信号处理所具有的优势。     

基于FPGA的数字滤波器设计与仿真

信息技术的快速发展带动了信号处理技术水平的大幅提升。利用可编程逻辑器件和EDA技术实现数字滤波器是现代嵌入式系统普遍使用的技术。探讨一种基于FPGA的FIR数字滤波器设计,首先掌握有限冲击响应FIR数字滤波器的基本原理,同时结合FIR数字滤波器的特点和目标滤波特性进行设计和计算。利用Matlab软件以及窗函数法设计滤波器并设置滤波参数,从而对各部分信号处理模块进行详细设计,使用Actel公司的综合性开发软件Libero v9.0完成FIR数字滤波器的设计、编译和仿真。     

基于MATLAB的FIR数字滤波器的窗函数法设计与仿真

数字滤波器是数字信号处理的核心内容之一,其设计在数字信号处理课程应用中有着重要的地位.MATLAB是学习和应用数字信号处理的一个极好的工具,该文根据FIR数字滤波器设计的基本原理,详细说明了基于MATLAB的FIR数字滤波器的窗函数设计法.最后,对所设计的滤波器进行滤波仿真验证,仿真结果表明设计的各项性能指标均能够达到设计目标要求.     

高阶调制信号发生器可变参数基带模块设计

基于FPGA可编程逻辑及NiosⅡ软核实现了高阶调制信号发生器设计,研究了奈奎斯特脉冲成型原理,分析了脉冲成型插值倍数、双边码元截断数、余弦滚降系数的选值,重点设计了基带处理模块部分的数字FIR脉冲成型滤波器,滤波器使用多相时变参数插值滤波结构,并针对AD9957串行IQ两路传输进一步优化了成型滤波FPGA逻辑结构,该方案大大节约了算法资源和逻辑单元.基带信号通过集成DDS+DAC的AD9957上变频模块实现载波调制,最后给出了Modelsim及Signal TapⅡ仿真图,并在示波器上显示了基带及调制信号的实验结果。     

线性相位FIR滤波器设计与DSP实现

数字滤器器设计与实现是数字信号处理领域的关键技术之一.在给出FIR滤波器基本原理与结构的基础上,阐述了利用Matlab获取滤波器系数,TMS320VC5402芯片实现滤波算法的基本方法,详细讨论了系数对称FIR滤波器汇编编程时的关键指令和步骤.实验结果表明,利用该设计流程能够满足所要求的滤波器性能,并具有存储量小、运算速度快的特点,验证了算法的有效性和实用性.     

基于FPGA的FIR滤波器设计方案优化

在介绍有限冲激响应(FIR)数字滤波器的理论基础上,提出了一种基于FPGA的16阶FIR低通数字滤波器的实现方案。该滤波器设计采用运算效率高的分布式算法结构,较好地解决了传统乘法累加结构运算速度低的不足。为节省硬件资源,设计中采取了分割查找表和偏移二进制数字编码技术,将所占ROM的大小由2LN减小到L/2(2N/2。最后给出了ModelSim下的仿真结果并对误差进行了分析,验证了该设计的正确性。     

基于MATLAB的FIR数字滤波器设计

数字信号处理技术广泛应用于各种工程技术领域,数字滤波是重要的信号处理方法。该文首先探讨FIR数字滤波器的结构和设计方法,进而使用MATLAB作为工具,采用两种方法设计FIR滤波器,运行结果显示完全符合技术指标要求。     

基于Matlab软件的FIR数字滤波辅助教学研究

以求解FIR数字滤波器的单位脉冲响应h(n)为线索,论述FIR数字滤波器设计和滤波过程.借助Matlab函数求解单位脉冲响应h(n),通过h(n)和系统函数H(z),设计FIR数字滤波器直接型和级联型滤波网络结构.设计输入序列,借助Matlab函数,通过FIR数字滤波器直接型和级联型滤波网络结构,完成对输入序列的滤波.形象地展现FIR数字滤波器的设计和滤波过程,加深学生对FIR数字滤波器的设计方法和数字滤波网络结构知识的理解.     

基于VHDL的单精度浮点FIR滤波器的实现

FIR滤波器以其良好的线性性能被广泛应用,它属于数字信号处理的基本模块之一。基于FPGA的FIR滤波器兼顾了实时性、灵活性和可靠性,是嵌入式系统中常用的FIR滤波器实现方法。本文的数据结构采用国际通用的IEEE754单精度浮点数,其计算精度能够满足一般系统的设计要求;而且本文的FIR滤波器实现方法在运算速度和硬件资源上做了较好地权衡,降低了算法对硬件的依赖性,使得本方法可以作为一个通用模块直接嵌入在系统中。     

基于窗函数法的FIR滤波器的仿真与实现

针对传统FIR数字滤波器设计繁琐和显示效果不直观等问题,提出一种结合窗函数理论和MATLAB仿真工具的设计方法,对比滤波前后的效果,设计的滤波器的各项性能指标均满足设计要求.同时,提出的设计方法设计过程简单,设计的滤波器精度高,可广泛应用于数字信号处理的课堂教学和工程设计中.     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

胡主席在印度,我却在中国

Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer.