Chapter2_3_Pacejka89_Tyremodel

这是中国科学技术大学的dsp实验内容，包括FFT，卷积，滤波器设计等内容，可供学习MATLAB以及深入理解dsp原理之用(This is dsp experiment of USTC, including FFT, convolution, filter design, etc., for learning MATLAB and in-depth understanding of the principle of dsp.)

matlab code for cryptography

scalar quantization of image and communication over erassure channel and error removal

English COMPRESSED sENSING

对文本格式的信号先滤波再求频域，便于在神经网络中应用，这是用matlab做的，很有用。(The text format, the signal first and then seek the frequency domain filtering)

求线性方程组的迭代法(高斯赛德尔)，基于MATLAB开发(Linear Iterative Method (high Sisaideer))

此程序用提升法实现第二代小波变换 ％％ 我用的是非整数阶小波变换 ％％ 采用时域实现,步骤先列后行 ％％ 正变换：分裂，预测，更新； ％％ 反变换：更新，预测，合并 ％％ 只做一层（可以多层，而且每层的预测和更新方程不同）(the procedure used to upgrade method is the second generation wavelet transform%% I use a non-integer-order wavelet transform%% using time domain achieved, steps out first go backward%% transformation : split and forecast updates; %% inverse transformation : Update, forecasting, %% off with a layer (which can be multi-storey, but the typical forecast and updating different equation))

可以实现FFT变化的时域图分析，可以清楚的知晓信号随时间的规律变化(Changes can achieve FFT time domain analysis, the signal can be clearly aware of the law change with time)

免疫粒子群算法，这种免疫粒子群优化算法结合了粒子群优化算法具有的全局寻优能力和免疫系统的免疫信息处理机制，并且实现简单，改善了粒子群优化算法摆脱局部极值点的能力。(Immune particle swarm algorithm, this immune particle swarm optimization PSO combines the global optimization ability of the immune system and immune mechanisms of information processing algorithm, and the simple, to improve the PSO' s ability to get rid of the local extreme points .)

first, this project simulates cdma network using 63 gold code over Rayleigh fading channel.then ,compares rake receiver performance with ordinary receiver and theory awgn and theory Rayleigh channel . finally , we observe decreasing ber when number of users is increasable.