基于FPGA和Matlab的FIR数字滤波器

为了满足信号处理快速和灵活的要求,基于FPGA实现的FIR滤波器有这两方面的优势,使用Matlab中的FDATool计算出滤波器系数并分析其幅频特性,利用FPGA分别设计实现串行结构、全并行结构以及基于IP核的FIR数字滤波器。利用Matlab软件进行FIR滤波器仿真,并与基于FPGA实现滤波器的Modelsim仿真输出数据进行比较,结果表明,设计的FIR滤波器功能正确、滤波性能良好。通过对不同结构滤波器的资源占用情况和数据处理速度进行分析,得出不同应用场合可选择不同的滤波器结构的结论。     

基于FPGA的FIR数字滤波器设计与实现

简要介绍了FIR数字滤波器的结构特点和基本原理,提出基于FPGA和DSP Builder的FIR数字滤波器的基本设计流程和实现方案。在Matlab/Simulink环境下,采用DSP Builder模块搭建FIR模型,根据FDATool工具对FIR滤波器进行了设计,然后进行系统级仿真和ModelSim功能仿真,其仿真结果表明其数字滤波器的滤波效果良好。通过SignalCompiler把模型转换成VHDL语言加入到FPGA的硬件设计中,从QuartusⅡ软件中的虚拟逻辑分析工具SignalTapⅡ中得到数字滤波器实时的结果波形图,结果符合预期。     

基于FPGA的嵌入式程控数字滤波器的实现研究

提出了一种程控数字滤波器的FPGA实现方法.以FIR数字滤波器为例,通过在单片FPGA芯片中构建嵌入式微处理器,加入系数可配置FIR滤波器等功能模块实现了频谱可控的程控数字滤波器.通过Modelsim后仿真和在Xilinx公司XUPV5-LX110T开发板上进行的实际测试,结果表明本文提出的方法是可行的.     

一种基于FPGA并行流水线的FIR滤波器设计方案

提出一种在FPGA器件上实现流水线并行FIR滤波器结构。首先从理论上分析有限冲激响应（FIR）数字滤波器的特点,并推出利用FPGA器件实现的可行性及其基本结构。接着利用VHDL实现每个模块,并对其进行仿真。     

基于FPGA的高速FIR数字滤波器的设计

采用了分布式算法、Booth算法、Wallace树和超前进位加法器、进位选择加法器结构,以及流水线技术,基于FPGA进行了高速FIR数字滤波器的设计。以低通FIR数字滤波器为例,利用Matlab辅助滤波器设计并做了频谱特性的验证,在ISE软件上进行了功能仿真、时序仿真和综合,并给出了综合的电路框图、资源使用情况以及最高工作频率。通过运用多种优秀的快速算法及流水线技术,可以打破FPGA中缺乏实现乘累加运算有效结构的缺点,实现高速FIR数字滤波器的设计,使FPGA在数字信号处理方面有长足发展。     

基于FPGA的FIR数字滤波系统设计与实现

文章提出一种基于FPGA的FIR数字滤波系统的设计方案,以FPGA为核心控制单元,通过Matlab设计FIR滤波器系数,调用Quartus II自带的IP核实现FIR滤波功能,结合ModelSim仿真,对输出信号进行时域、频域分析,构建出一套全数字的FIR滤波器设计与仿真体系。进而实现了一种集信号发生器、数据采集器和FIR滤波器为一体的FIR数字滤波系统。经实验,该系统可以显著提高信号的信噪比,降低均方误差。文章提出的FIR数字滤波系统及其实现方法,具备一定的推广和应用价值。     

基于FPGA的FIR滤波器设计与仿真

FIR数字滤波器以其良好的线性相位特性被广泛使用,属于数字信号处理的基本模块之一.FPGA具有的灵活的可编程逻辑可以方便地实现高速数字信号处理.为了提高实时数字信号处理的速度,利用FPGA芯片内部的ROM实现一种查找表结构的FIR数字滤波器.并用MATLAB对实验结果进行仿真和分析,证明了设计的可行性.     

基于Matlab和FPGA的FIR数字滤波器设计及实现

基于FIR数字滤波器的原理和层次化、模块化设计思想,结合Altera公司的Cyclone II系列FPGA芯片,提出了FIR数字滤波器的实现硬件方案,给出了采用Matlab、QuartusⅡ设计及实现32阶低通FIR滤波器的方法步骤,仿真及实际测试结果验证了设计方案的正确性,与传统的数字滤波器相比,本文设计的FIR数字滤波器具有更好的实时性、灵活性和实用性。     

FPGA实现FIR抽取滤波器的设计

采用基于分布式算法思想的方法来设计FIR滤波器,利用FDAtool设计系统参数,计算滤波器系数,同时为了要满足系统要求考虑系数的位数。根据FIR数字滤波器结构,对FIR数字滤波器的FPGA实现方法进行分析。     

FPGA在数字滤波器设计中的应用

介绍了FIR数字滤波器的硬件实现技术,结合Altera公司的FLEX10K系列芯片提出了实现FIR数字滤波器的硬件电路的方案,设计出一种8阶FIR数字滤波器,并且推广到16阶及32阶,以及实现滤波器的AHDL语言。基于FPGA的电路系统设计及其仿真结果表明此系统合理、可靠且满足设计要求。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

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.     

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.     

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.     

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.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

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