由于数字信号处理(digital signal processing)的领域中,我们处理的信号都是经过采样(sampling)的,而这些信号的采样点数是有限的。因此离散Fourier变换是一个有限维内积空间里的基变换。我们设信号采样的数量为N,则我们的信号向量 x\in\mathbb{C}^N 。在离散场景下我们定义信号(时域下的)自然基: \mathbf{\hat{e}...
Z 系列 Infiniium 示波器在 4 个通道上具有高达 63 GHz 的带宽,在 4 个通道上具有 160 Gsa/ 秒的采样速率,每个通道具有 2 Gsa 的存储深度。 使用示波器搭配89600 VSA 软件进行宽带脉冲射频时域和频域测量 使用89600 矢量信号分析(VSA)软件可以进一步增强采用 Infiniium 示波器进行的射频和 FFT 测量。使用 ...
DFT(离散傅里叶变换)作为将信号从时域转换到频域的基本运算,在各种数字信号处理中起着核心作用,其快速算法FFT(快速傅里叶变换)在无线通信、语音识别、图像处理和频谱分析等领域有着广泛的应用。用大规模集成电路FPGA(现场可编程门阵列)来实现FFT算法时,需要重点考虑的不再是算法运算量,而是算法的复杂性、规整性和模块...
基本算法见 Wang, Y., K. Shi, and E. Serpedi. "Non-Data-Aided Feedforward Carrier Frequency Offset Estimators for QAM Constellations: A Nonlinear Least-Squares Approach." EURASIP Journal on Applied Signal Processing. 2004:13, pp. 1993–2001 基于F F T FFTFFT的频偏估计算法如下: Δ f ^ =...
What's the correct way to filter in the frequency domain? what I'm missing? Also, is it really needed to attenuate negative frequencies as well? I've seen an FFT implementation where neg. frequency values are zeroed before synthesis. Thanks in advance. filtering signal-processing fft dft Sha...
(1)在Vivado软件主界面,打开IP Catalog,在搜索框内输入FFT,然后找到Digital Signal Processing->Transforms->FFTs目录下的Fast Fourier Transform,双击进入配置界面。 (2)进入到配置界面,左边是IP核的接口图、实现的一些细节信息和FFT的延迟,右边是Configuration、Implementation和Detailed Implementation三个标签卡。 Vivado...
C. (1979). Mixed Radix Fast Fourier Transforms, in Programs for Digital Signal Processing, IEEE Digital Signal Processing Committee eds. IEEE Press. Cooley, James W., and Tukey, John W. (1965). An algorithm for the machine calculation of complex Fourier series, Mathematics of Computation, ...
CORDIC Based FFT for Signal Processing System A pure CORDIC based architecture is used to calculate the FFT in signal processing. Though many hardware efficientalgorithms exist, but these are not gener... S Karthick,P Priya,S Valarmathy - 《International Journal of Advanced Research in Electrical...
计算DFT还有其他的算法（文末附奥本海姆(Discrete-Time Signal Processing-by Alan V. Oppenheim-2015年...
SimulationBased on the high-speed, real-time and high precision of radar signal processing, FFT arithmetic is utilized in the radar signal processing and FFT processor is designed and implemented. The proposed processor adopts radix-2 FFT algorithm. FFT computing based on FPGA has the advantages ...