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farrow filter
- A design method was introd uced to efficiently implement an interpolator by Farrow structure，which can be used in an all—digital timing recovery scheme．An algorithm was presented to calculate the interpolator coefficients of Farrow structure and min
band-pass-filter 线性相位FIR带通滤波器
- 用MATLAB函数fir1设计一个具有如下指标的线性相位FIR带通滤波器：阻带截止频率为0.55pi 和0.85pi，通带截止频率为0.65pi和 0.75pi，最大通带衰减为0.2dB，最小阻带衰减为42dB。分别利用下面的窗函数来设计滤波器：汉宁窗、汉明窗、布莱克曼窗。对于每种情况，给出其冲激响应系数并画出设计的滤波器的幅频响应。-Designed with a MATLAB function with the following indicators fir1 linear phase F
new-median-filter
- 一种新德中值滤波，在邻域内如果中心像素为最大值或最小值则用中值代替，否则保持原值不变，适合于红外图像的椒盐去噪。-A new DE median filter, in the neighbourhood if center pixels for maximum or minimum value is used instead of value, or keep the same original value, suitable for infrared image denoising salt
16qam_channel_encode
- 一、 本程序采用16QAM调制方式，对一串2进制信源进行调制，采用（7，4）循环码对信源做信道编码，用升余弦滚降函数进行基带调制，再调到高频信道；在信道上加入高斯白噪声，运用匹配滤波器解调，画出解调星座图，运用最小欧氏距离译码判决，再对信号进行信道解码，画出采用信道编码技术和不采用信道编码技术的误比特率图。-First, this program uses 16QAM modulation mode, for a string of two binary source is modulated,
filter
- ％ y=filter(sig,fmin,fmax) ％ 对信号进行理想滤波，可完成低通，带通 ％ sig为被滤波信号 ％ fmin为下限频率，当fmin为0时为低通滤波器，当fmin>0时，为带通滤波器 ％ fmax为上限频率，fmax>fmin ％ fs为信号的采样频率 ％ y为经过滤波后的信号 -％ Y = filter (sig, fmin, fmax)％ of the ideal signal filtering, to be com
minimumphaseFIRfilter
- FIR滤波器设计中往往是线性相位，但不是最小相位，所以它的零点有部分在单位圆外。把单位圆外的零点映射到单位圆内，构成最小相位滤波器。-FIR filter design is often the linear phase, but it is not minimum phase, so it has some of the zeros outside the unit circle. To zero outside the unit circle is mapped to the unit ci
aliasingfilter
- 1）设计Butterworth型音频抗混叠滤波器； 2）参数： 下通带频率300Hz；上通带频率3400Hz； 下阻带频率280Hz；上阻带频率3600Hz； 通带最大衰减0.3dB； 阻带最小衰减40dB； 3）采用一低通滤波器和一高通滤波器级联； 4）分别确定LPF和HPF的性能指标； 5）求出两滤波器的系统函数和频率响应，并画出其幅频特性曲线； 6）求整个滤波器的系统函数和频率响应，并画出其幅频特性曲线。-1) the design of Butterw
dif_spfilt
- 应用多种滤波器进行处理：算术均值，几何 均值，谐波均值，逆谐波均值，中值滤波， 中点滤波，最大值、最小值滤波等-To deal with a variety of filter applications: arithmetic mean, geometric mean, harmonic mean, inverse harmonic mean, median filter, the mid-point filtering, maximum, minimum filtering
maxima
- this function will help to find local maximas of an one dimensional data,inputs are data array and minimum gap between two local maximas, it is better to use this function after filtering data using median filter
max_min_filter
- 在图像利用M*N的窗 运行2维最大滤波器 在图像利用M*N的窗 运行2维最小滤波器 -performs two-dimensional maximum filtering on the image X using an M-by-N window. performs the 1D max/min filtering of the row vector X using a N-length filter. performs two-dimensional minimum filtering
LMSAdptiveFilter
- 采用最小均方准则误差的自适应滤波器，根据输入信号的统计特性自动调整其结构参数，以满足某种最佳准则的要求。-Guidelines for use of minimum mean-square error of the adaptive filter, according to statistical characteristics of the input signal automatically adjusting its structural parameters, in order to m
calcAngularDerivative
- This function calculates the radial derivative of an input image. Input parameters: inputImage - the image to calculate the derivative from radialFilterLength - the length of the filter to use, total length will be 2*radialFilterLength+1
MinPhase
- Design a minimum phase lowpass fir filter
1124345436765564
- 粒子滤波(PF: Particle Filter)的思想基于蒙特卡洛方法(Monte Carlo methods)，它是利用粒子集来表示概率，可以用在任何形式的状态空间模型上。其核心思想是通过从后验概率中抽取的随机状态粒子来表达其分布，是一种顺序重要性采样法(Sequential Importance Sampling)。简单来说，粒子滤波法是指通过寻找一组在状态空间传播的随机样本对概率密度函数 进行近似，以样本均值代替积分运算，从而获得状态最小方差分布的过程。这里的样本即指粒子,当样本数量N→
zr
- 1. 用双线性变换法设计一个巴特沃斯低通IIR数字滤波器。设计指标参数为：在通带内频率低于0.2π时，最大衰减小于1dB；在阻带内[0.3π, π]频率区间上，最小衰减大于15dB. 2.0.02π为采样间隔，打印出数字滤波器在频率区间[0, π/2]上的频率响应特性曲线。 3. 用所设计的滤波器对实际心电图信号采样序列进行仿真滤波处理，观察总结滤波作用与效果 附：心电图采样序列x(n) 人体心电图信号在测量过程中往往受到工业高频干扰，所以必须经过低通滤波处理后，才能作为判断心脏
OrderStatisticFilter
- 四个IMAGE窗口，分别对图像进行读取，最大值滤波，最小值滤波及中值滤波。-Four IMAGE window, read the image, respectively, maximum filter, the minimum filter and median filter.
gm
- 经典的频谱共享的EI检索算法，运用动态频谱租用来提高频谱利用率。-Dynamic Spectrum Leasing (DSL) is a new paradigm for efficient spectrum sharing in cognitive radio networks that was recently proposed in [1]–[3]. Unlike in a hierarchical dynamic spectrum access (DSA) network,
Filter
- VC++自适应数字滤波器实验程序的源代码，可生成固定带通滤波器曲线图、可变带通滤波器曲线图、噪声删除、输入输出误差，可设置最低频率和最高频率，Y轴缩放等参数。 -VC++ adaptive digital filter test program' s source code, can generate a fixed band-pass filter curve, curve of the variable band-pass filter, noise removed, the inpu
Adaptive-MMSE-filter
- 数字信号处理 一阶自适应最小均方误差预测滤波器-Digital signal processing first-order adaptive minimum mean square error of prediction filter
minimum filter
- low pass minimum filter