FIR-digital-filter

泥沙粒度参数计算程序,应用作图法来计算粒度参数，计算公式为国家海洋调查规范所用的公式，一共输出五个参数，平均粒径，中值粒径，分选系数，偏态系数，峰态系数。(Sediment grain size calculation procedures, the application of mapping method to calculate the size parameters, calculated as the National Marine survey specifications used in the formula, total output of five parameters, the average particle size, median diameter, sorting coefficient, skewness factor, kurtosis coefficient.)

Direct sequence spread spectrum (DSSS) communication systems has been widely used in these years for its advantage of wide spectrum, low working Signal-to-Noise ratio (SNR), anti-interference, anti-multipath effect and capability of LPI and LPD. They are increasingly replacing conventional communication forms and obtaining extensively applications in modern military and commercial communication systems, for example, CDMA communication system, GPS , measuring and control system, satellite chain, identification of friend or foe and etc. Therefore, corresponding DSSS electronic counter technique becomes a big problem to solve in electronic warfare domain. DSSS electronic counter technique including blind detection, blind parameter estimation and spreading sequences estimation. For the issue of DSSS electronic counter technique of DSSS/QPSK signal damaged by strong additive white Gaussian noise (AWGN), the main research content in this dissertation as follow.

1、不同阶次模拟巴特沃兹滤波器的频率响应 2、根据模拟滤波器指标，设计低通巴特沃兹滤波器 要求通带截止频率 fp = 5kHz, 通带最大衰减 ɑp =2dB， 阻带截止频率 fs= 12kHz, 阻 带最小衰减ɑs =30dB,按照上述指标设计巴特沃兹低通滤波器。 3、给定模拟滤波器，按照不同采样频率设计数字 IIR，观察采样频率对设计结果的影响 已知模拟滤波器传输函数 H(s)为 2 0.5012 ( ) 0.6449 0.7079 H s s s = + + 按照不同采样频率 Fs1=1Hz, Fs2=10Hz 使用脉冲响应不变法将 H(s)转换为 H(z)数字 IIR 滤波器。观察不同采样频率设计得到的数字 IIR 的差异。 4、给定数字 IIR 指标，用脉冲响应不变法设计 IIR。 数字低通滤波器的指标为: 0.2 , 1 , 0.3 , 15 p p s s ω π α ω π α = = = = dB dB ,使用巴特沃 兹滤波器设计数字 IIR。比较采样频率 Fs=1， 2 时设计过程中的模拟滤波器，数字滤波 器的变化。 5、用双线性变换法设计 IIR，并同脉冲响应不变法比较设计的结果。数字滤波器指标要 求如下 0.2 , 1 , 0.3 , 15 p p s s ω π α ω π α = = = = dB dB(1.Grasp the impulse response method and bilinear transformation design IIR filter principle and specific design methods, familiar with double A computer program for designing lowpass, bandpass and highpass IIR digital filters by linear design; 2 . familiar with the design of analog Butterworth filter, master impulse response method and bilinear transformation method to design digital IIR Filter method)

使用吗matlab语言，实现很多模式识别上的经典算法，如Perceptron_Batch算法等(Matlab language to use it to achieve many of the classic pattern recognition algorithms, such as algorithm Perceptron_Batch)

说明：  席位分配的MATLAB程序，达到了理想的运行效果(The distribution of seats in the MATLAB procedures to achieve the ideal performance of)

对一个输入变化的的系统求逆，用SVM拟合逆系统(An input change system inverse fitting with SVM inverse system)

a power point tutorial demonstrate adaptive modulation

基于Simulink的FIR数字滤波器的设计与实现(Simulink-based FIR digital filter design and implementation)

在高斯信道下的16QAM的仿真及误码率分析(16qam modulator and demodulator in fading channels for wireless communications )

MATLAB实现基于趋近律的滑模控制 (MATLAB Reaching Law based Sliding Mode Control)