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uncoded
基于高斯白噪声信道采用M-QAM调制技术的系统，分组错误概率与信噪比函数关系的matlab仿真程序(Gaussian white noise channel with M-QAM modulation system, packet error probability and SNR function of matlab simulation program)
- 2010-06-14 15:43:20下载
- 积分：1
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dvr
DVR-digital voltage rcorder
- 2015-04-22 16:30:58下载
- 积分：1
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DSPII_USTC_01
传统的宽带信号中抑制正弦干扰的方法是采用陷波器(notch filter),为此需要精确知道干扰正弦的频率.然而当干扰正弦频率是缓慢变化时,且选频率特性要求十分尖锐时,则最好采用自适应噪声抵消的方法.下图是用一个二阶FIR的LMS自适应滤波器消除正弦干扰的一个方案。该代码实现了以下功能：
1) 借助MATLAB画出了滤波器的误差性能曲面和误差性能曲面的等值曲线；
2） 给出了最陡下降法以及LMS算法的计算公式；
3） 用MATLAB产生了方差为0.05, 均值为0白噪音S(n)，并画出某次采样得到的波形；
4） 根据 2）中的公式，并利用 3）中产生的S(n)，在 1）中的误差性能曲面的等值曲线上叠加画出了采用最陡下降法以及LMS法时H(n)的在叠代过程中的轨迹曲线；
5）用MATLAB计算并画出了LMS法时误差随时间n的变化曲线（对应S(n)的某一次的一次实现）和e(n)波形；
6）在 1）中的误差性能曲面的等值曲线上，叠加画出采用LMS法得到的100次实验中的H(n)的平均值的轨迹曲线；
7）最终对结果进行了分析，具体见压缩包的word文档。
(Wideband signal in the conventional sinusoidal interference suppression method is the use notch filter (notch filter), this requires precise knowledge of the frequency of a sinusoidal interference . However, when the interference frequency sinusoidal changes slowly , and the selected frequency characteristic requirements are very sharp , then best use of adaptive noise cancellation method . following figure is a second-order FIR LMS adaptive filter to eliminate a program sinusoidal interference . The code implements the following functions:
A ) draw with MATLAB error performance of the filter surface and the surface contour error performance curve
2 ) gives the steepest descent method and the LMS algorithm formula
3 ) generated using MATLAB variance of 0.05 with a mean of 0 white noise S (n), and draw a particular sampling waveform
4 ) based on 2 ) of the formula , and use 3 ) generated in S (n), in a ) the error performance curves superimposed on the surface contour pl)
- 2013-11-06 13:12:36下载
- 积分：1
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flat_array_dbf
面阵的幅度相位全控制自适应数字波束形成算法——对角加载 QRD-SMI 算法的研究；两种面阵唯相位(Phase-Only)数字波束形成算法——小相
位扰动约束算法和期望方向增益最大约束算法的研究；面阵的数字多波束形成算法——二维 FFT 多波束的研究，以及 FFT 在可编程逻辑器件中的实现。
(Research of the adaptive digital beamforming algorithm, which
control both amplitude and phase of each array element: diagonal
loading QRD-SMI algorithm.
② Research of two Phase-Only DBF algorithms: small phase
perturbation restriction algorithm and maximum gain of the
expected direction restriction algorithm.
③ Research of multiple beams algorithm for planar array: 2D-FFT
multiple beams. And the realization of FFT with CPLD.
)
- 2016-05-12 22:08:10下载
- 积分：1
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chirp_echo_signal
线性调频信号的回波仿真，比较特别的是对近距目标的仿真(the stimulation of Linear fm signal wave , particularly to the close goals )
- 2010-11-23 11:12:04下载
- 积分：1
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bungee
用matlab中simulink仿真蹦极运动(Bungee jumping in with matlab simulink simulation exercise)
- 2011-07-13 11:51:24下载
- 积分：1
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induction-motor-speed-control
3 phase squirrel cage induciton motor control via space vector concept. The hardware include a constant DC source, a 3 phase inverter and a 2 kw induction motor. Speed reference was proved to be tracked rapidly.
- 2012-08-12 14:59:20下载
- 积分：1
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Machinery-Diagnosis
子波分析是一种日益获得广泛应用的信号处理新技
术, 具有良好的时-频局部化特性, 尤其适用于时变及非平
稳信号。本文简述了子波函数与子波展开的基本概念, 利用
展缩子波和调和子波将信号及信号均方值进行时-频两维
分布。最后采用了三种子波分析方法对轴承故障进行诊断,
即使对现有各种方法尚难以诊断的滚动体故障, 也能获得
满意的结果, 说明子波分析的确为机械故障诊断提供了强
有力的分析手段。(Wavelet a nalysis, as a new technique of signal processing , possesses ex cellent characteristic
of time-frequency localization and is suitable for analyzing
the time-var ying or transient signals. In this paper , the basic concepts of wavelet function and
wavelet expansion are briefly introduced. The time frequency
distribution of signal and its energy are obtained by decomposition via dilating wavelet and harmanic wavelet. )
- 2012-01-02 03:56:37下载
- 积分：1
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leidafangcheng1
雷达作用距离仿真，雷达标准形式方程仿真。搜索条件下雷达方程仿真；跟踪条件下雷达方程仿真；杂波条件下雷达方程仿真；大气衰减条件下雷达方程仿真；(Radar range simulation, radar simulation standard form equation. Radar equation simulation under search criteria tracking radar equation simulation under conditions radar equation simulation clutter conditions under conditions of atmospheric attenuation radar equation simulation )
- 2016-07-05 12:18:50下载
- 积分：1
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Nouveaudossier
Code MATLAB pour restaurer une image floue (flou gaussien)
- 2009-05-13 22:35:16下载
- 积分：1
