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hechengdizhenjilu
说明: 合成地震记录的小程序 请大家互相学习 (Small synthetic seismogram program please learn from each other)
- 2010-04-28 10:17:13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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clone_mut_select
说明: 人工免疫算法 非常非常有参考价值的,谢谢~(Artificial immune algorithm is very valuable, thank you ~)
- 2011-02-19 09:20:11下载
- 积分:1
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FSSSinmatlab
matlab中扩频通信系统的仿真以及误码率的计算包含DSSS以及FSSS(matlab in spread spectrum communications system simulation and bit error rate calculation includes DSSS and FSSS)
- 2013-06-28 08:59:21下载
- 积分:1
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Plsgui
PLS-GUI。非常经典的PLS软件。完全图形化。(PLS-GUI, written for MATLAB)
- 2015-01-08 16:31:32下载
- 积分:1
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ff_4
Rastrigin function with firefly algorithm
- 2015-02-01 05:31:26下载
- 积分:1
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STATCOM_chip_controller
Implement chip controller for a composite microgrid.
- 2012-11-11 18:01:17下载
- 积分:1
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SpeedControl
Pulse Modulated Signal Mfile
- 2010-09-21 18:07:00下载
- 积分:1
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DDS_Report
Study of Digital Modulation Schemes using DDS(Study of using Digital Modulation Schemes DDS)
- 2006-12-27 17:41:11下载
- 积分:1
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proposed_method
在阵列天线自适应信号处理中,经常会出现因为阵元位置信号角度估计等误差引起的,天线性能急剧下降的问题,在此运用稳健性的方法提出一种稳健的自适应阵列天线波束合成方法,来解决此问题(In the adaptive array antenna signal processing, often occur because the sensor position signal angle estimation error caused a sharp decline in the performance of the antenna problem, a robust adaptive array antenna beam synthesis method in this application of the robustness of the method to solve this problem)
- 2014-09-25 10:53:31下载
- 积分:1