pcm_chianelxie

说明：  这是一篇关于GPS信号的捕获文章，采用的是DF差分相关捕获的算法，具有在较低信噪比的情况下捕获信号(This is an article about the capture of GPS signal, using the DF algorithm to capture differential associated with low signal to noise ratio in the case of capture signal)

This set of matlab codes implement local histogram equalization of an image

ANT COLONY OPTIMIZATION

WAVELET CODING FOR IMAGE

几篇关于希尔伯特变换的论文，介绍希尔伯特变换(hilbert pdf)

L algorithme de Regularised orthogona matching poursuit qui permet la reconstruction des signaux

内附收集的几种ldpc代码（编码解码皆有），另有论文及书籍（pdf格式）(Containing a collection of several ldpc code (codec Jieyou), while papers and books (pdf format))

研究了重频参差相参脉冲串的频率估计算法。通过脉内相关积累，提高了新序列的信噪比。对新序列的相位差按参差重数抽样平均，减小了等效的相位噪声方差，利用重频参差比解相位模糊，扩大了频偏允许范围，降低了算法的信噪比门限。分析了本算法实现相参频率估计的条件，推导了相应信噪比门限的解析表达式，指出了信噪比门限与信号样本总数、参差重数、参差比之阎的关系。仿真结果表明：上述结论是正确的，在满足信噪比门限条件下，频率估计的精度接近相参脉冲串频率估计的克拉美一罗限(CRLB)。(Frequency Estimation for Staggered Coherent Pulse Train)

微分方程绘制三维图，六个相互耦合的微分方程，绘制其中两个量变化对第三个量影响关系的三围图(three-dimensional figure of differential equation )

matlab符号运算的电子书籍。对想学习matlab的同学比较有用(the matlab symbolic computation electronic books. Useful to the students want to learn matlab)