随着数字电子技术的发展,数字信号处理广泛应用于声纳、雷达、通讯语音处理和图像处理等领域。快速傅立叶变换(Fast fourier Transform,FFT)在数字信号处理系统中起着很重要的作用,FFT 有效地提高了离散傅立叶变换(Discret fourier Transform,DFT)的运算效率。 处理器一般要求具有高速度、高精度、大容量和实时处理的性能,而现场可编程门阵列(Field Programmable Gate Array,FPGA)是近年来迅速发展起来的新型可编程器件,在处理大规模数据方面,有极大的优势。论文采用了在FPGA中实现FFT算法的方案。 数字信号处理板的硬件电路设计是本论文的重要部分之一。在介绍了FFT以及波束形成的基本原理和基本方法的基础上,根据实时处理的要求,给出了数字信号处理板的硬件设计方案并对硬件电路的实现进行了分析和说明。 依据数字系统的设计方法,分别采用基二按时间抽取FFT算法、基四按时间抽取FFT算法以及FFT兆核函数三种方法利用硬件描述语言(VHSICHardware Description Language,VHDL)实现了1024点的FFT,接着对三种方法进行了评估,得出了FPGA完全能满足处理器的实时处理的要求的结论。然后根据通用串行总线(Universial Serial Bus,USB)协议,利用VHDL语言编写了USB接口芯片ISP1581的固件程序,实现了设备的枚举过程。
上传时间: 2013-08-01
上传用户:Aidane
·详细说明:Goertzel算法是DTMF信号检测的核心,它利用二极点的IIR滤波器计算离散傅立叶变换值,快速有效的提取输入信号的频谱信息。-Goertzel algorithm is the DTMF signal examination core, it uses two extremes the IIR filter computations to be separated fourier t
上传时间: 2013-04-24
上传用户:moshushi0009
量测/测试所面临之问题 此测试验证上,要使用NI公司之LAB VIEW及DAQ CARD来取代AUDIO PRECISION及其所附软体ATS。首先需克服硬体解析度上的差异,再来是FFT(FAST fourier TRANSFORM,快速传立业转换)演算未予的撰写,这将会影响MULTI-TONE讯号上PEAK值的侦测。另外,以RS-232为I/O介面,并呼叫客户所提供之DLL档来与DUT内的IC沟通,但因LAB VIEW无法直接呼叫其STRUCTURE,故需用VC++再编译一层新的DLL来供LAB VIEW使用。
上传时间: 2013-12-13
上传用户:longlong12345678
CT图像重建的变换类算法,该方法采用fourier变换算法
上传时间: 2014-01-11
上传用户:yd19890720
Math.NET开源数学库 C#实现 具体功能: - A linear algebra package, see MathNet.Numerics.LinearAlgebra. - A sparse linear algebra package, see MathNet.Numerics.LinearAlgebra.Sparse. - Non-uniform random generators, see MathNet.Numerics.Generators. - Distribution fonctions, see MathNet.Numerics.Distributions. - Statistical accumulator, see MathNet.Numerics.Statistics. - fourier transformations, see MathNet.Numerics.Transformations. - Miscellaneous utilies (polynomials, rationals, collections).
标签: LinearAlgebra Numerics MathNet algebra
上传时间: 2015-07-24
上传用户:思琦琦
抽样定理的实验体会,快速fourier变换(FFT)及其应用等等的作业源码,很不错的,希望大家喜欢
上传时间: 2015-08-15
上传用户:lanhuaying
c语言科学与工程程序库,主要包括一般统计,多重回归,fourier分析
上传时间: 2013-12-05
上传用户:lanhuaying
A Numerical Photonics library written in C++. The library includes beam propagation method, coupled mode method, Bragg Gating Analysis, transfer matrix method, and vectorial fourier Decomposition method. Very useful in simulating integrated Photonic devices
标签: library propagation Numerical Photonics
上传时间: 2013-12-22
上传用户:wendy15
图像匹配论文,介绍fourier-mellin算法及用途,改进措施等
上传时间: 2014-02-08
上传用户:yepeng139
GloptiPoly 3: moments, optimization and semidefinite programming. Gloptipoly 3 is intended to solve, or at least approximate, the Generalized Problem of Moments (GPM), an infinite-dimensional optimization problem which can be viewed as an extension of the classical problem of moments [8]. From a theoretical viewpoint, the GPM has developments and impact in various areas of mathematics such as algebra, fourier analysis, functional analysis, operator theory, probability and statistics, to cite a few. In addition, and despite a rather simple and short formulation, the GPM has a large number of important applications in various fields such as optimization, probability, finance, control, signal processing, chemistry, cristallography, tomography, etc. For an account of various methodologies as well as some of potential applications, the interested reader is referred to [1, 2] and the nice collection of papers [5].
标签: optimization semidefinite programming GloptiPoly
上传时间: 2016-06-05
上传用户:lgnf