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CognitiveRadio
Cognitive Radio Primary User Detection
- 2010-05-19 13:19:24下载
- 积分:1
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Desktop
快速FFT的算法,在做数字信号处理时,需要做频谱分析时需要用到的快速傅里叶变换的算法。(Fast FFT algorithm)
- 2014-01-04 19:32:02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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pv_characteristic
this is simulink module of pv cell.
- 2011-02-08 23:39:17下载
- 积分:1
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crfChain
条件随机场模型(CRF)的MATLAB源码(MATLAB source of conditional random fields model (CRF))
- 2012-07-16 16:53:54下载
- 积分:1
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xiangxiangxishu
非常实用的关于相像系数的程序,与大家分享,希望能在相像系数仿真上面有所帮助(Very practical program resemblance coefficient, helpful to share with you and hope simulation resemblance coefficient above)
- 2012-10-28 17:16:52下载
- 积分:1
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smart
智能天线算法,阵列天线波束成形,增益对准有用信号方向,抑制干扰信号(Smart antenna matlab algorithm, linear array antenna beam forming, the alignment direction of the useful signal, interference suppression direction)
- 2021-03-11 19:49:25下载
- 积分:1
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qam
通信原理仿真的matlab实现振幅和相位联合调制(Matlab simulation communication principle to achieve amplitude and phase modulation)
- 2010-12-08 17:46:05下载
- 积分:1
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BPSK_OFDM_SimulationByMatlabCode
用matlab仿真的BPSK_OFDM_Simulation的代码(Simulation using matlab code BPSK_OFDM_Simulation)
- 2011-04-20 21:20:53下载
- 积分:1
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Final_Group12_EEE4554
a file on multimedia project which can be opened by any document openning softwares
- 2013-01-11 17:01:16下载
- 积分:1