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ldpc_decode
说明: 很不错的LDPC译码的matlab程序,觉得有用大家分享一下(LDPC decoder)
- 2009-07-28 08:56:50下载
- 积分:1
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seismodel
说明: 这是一个地震波正演的程序,采用雷克子波,可以画出地震的变面积图(use ricker wavelet to do the forward of the seismic)
- 2010-04-18 20:04:56下载
- 积分:1
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jiance
基于视频的背景差分法检测跟踪运动车辆,内有程序和视频(Video-based background subtraction method detecting and tracking moving vehicles, there are procedures and video)
- 2013-05-13 22:22:46下载
- 积分:1
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chap5
matlab图像处理实例详解chap5——图像增强技术(matlab image processing example explanation chap5- image enhancement technology)
- 2013-11-06 14:23:34下载
- 积分:1
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65f33c80aa2c
adaboost training for weak classifier.Simple example for classifier and training is done
- 2012-11-21 12:40:04下载
- 积分:1
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FIR
1、验证窗函数 N 变化时,验证其频谱主瓣副瓣比、主瓣宽度的变化。
a)矩形窗函数的 N 变化时,验证其其频谱主瓣副瓣幅度比基本不会发生变化,
而主瓣宽度将会变窄。这说明,当用矩形窗函数设计滤波器时,增大 N 不能使
得阻带衰减减小,但能够减小过渡带。
b)再选取其他的窗如 hamming/hanning 窗,验证当 N 变化时,其频谱主瓣宽
度变化、主瓣副瓣比值变化情况。
2、用窗函数法设计线性相位 FIR 低通,通带截止频率 wp=0.5PI, 阻带截止频率 ws=0.6PI,
阻带衰减不小于 40dB,通带衰减不大于 3dB.
a)选取 Hanning,Hamming 窗查看设计出来的 FIR 的过渡带宽和阻带衰减是否
满足要求,二者有什么不同。
b)使用 hamming 窗,将窗长增大 1 倍,设计 FIR。验证同样的窗函数类型
(hamming),不同窗长度时,设计出来的 FIR 的过渡带宽和阻带衰减都有什么变
化。
3、不使用 Matlab 系统函数得到上一项指标的低通,并与上一项结果比较。
4 用窗函数法设计线性相位 FIR 高通,通带截止频率 wp=0.8PI, 阻带截止频率
ws=0.7PI, 阻带衰减不小于 30dB,通带衰减不大于 3dB.(An actual filter is implemented using the truncated unit impulse response sequence of the ideal filter.
For the ideal low pass filter, the unit impulse response h, N, D () is intercepted by a length of N, and the length is
The N sequence H (n), when intercepted, guarantees causality and linear phase requirements for the filter.
In order to reduce the Gibbs effect, the H (n) window is added, and the appropriate window function is selected to ensure the stopband attenuation and
Transition zone requirement. Note that the sidelobe of the window function affects the stopband attenuation of the filter, and the main lobe width affects the filter
Transition bandwidth.)
- 2017-07-06 11:55:24下载
- 积分:1
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MTKLjcxhyanz
NTKL法可以同时检测光谱异常点、参考数据异常点及其他们共同的异常点,该方法的基本思路是基于蒙特卡洛采样,随机将样本集划分为校正集与预测集,用校正集建模,并对没参与建模的样本进行预测误差计算,进行几千次这样随机采样,每个样本点都可得到其预测误差分布。如果奇异样本在校正集中,整个模型的质量将受到影响;相反,如果奇异样本在预测集中,仅此样本的预测结果受到影响。(NTKL method can simultaneously detect abnormal spectrum and abnormal reference data points and their common abnormal point, the basic idea of this method is based on the monte carlo sampling, sample set random be divided into calibration set and prediction set, using correction modeling, modeling and participated in the samples of the prediction error calculation, a thousands of times that of random sampling, each sample point can be obtained the prediction error distribution.If singular samples in correction, the model of quality will be affected.Singular samples in predicting concentration, on the contrary, if only for the sample prediction results are affected.)
- 2016-07-15 10:36:52下载
- 积分:1
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d2gauss
function to calculate gaussian filter
- 2010-08-22 02:48:21下载
- 积分:1
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matlabARMA
在matlab下时间序列分析ARMA模型的建立和预测程序ARMA(Under the matlab time series analysis and forecasting ARMA model procedures for ARMA)
- 2010-02-04 16:16:00下载
- 积分:1
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Simulink
压缩文件中是simulink的教程文件,简单介绍了matlab的simulink仿真用法(Compressed file is simulink tutorial files, a brief introduction of the use of matlab simulation in simulink)
- 2010-02-27 11:27:24下载
- 积分:1