SM_STBC_4x4_HQT

说明：  通过一个循环方阵A来构造准循环LDPC码的校验矩阵H(make H in QC-ldpc)

This is an matlab code about Amplitude Modulator Noise Very easy to understand Used in Fiber Optical Communication system

kmeans is image segmentation algorithm.

H无穷在汽车减震系统应用的仿真,有系统的具体数值及仿真图像 (H∞simulation used in the automobile suspension system，Concreting numerical and simulation system images )

说明：  LADRC，自抗扰控制算法的simulink例程，三阶。(LADRC, active disturbance rejection control algorithm - simulink routine, third order.)

说明：  5位0-7数字的rs编码，解码和纠错，两位纠错码(Rs numbers 0-7 5 encoding, decoding, and error correction, the two error correction code)

经典的香农采样定理认为,为了不失真地恢复模拟信号,采样频率应该不小于奈奎斯特频率(即模拟信号 频谱中的最高频率)的两倍.但是其中除了利用到信号是有限带宽的假设外,没利用任何的其它先验信息.采集到 的数据存在很大程度的冗余.Donoho等人提出的压缩感知方法(Compressed Sensing或Compressive Sampling, CS)充分运用了大部分信号在预知的一组基上可以稀疏表示这一先验信息,利用随机投影实现了在远低于奈奎斯 特频率的采样频率下对压缩数据的直接采集.该方法不仅为降低采样频率提供了一种新思路,也为其它科学领域 的研究提供了新的契机.该文综述性地阐述了压缩感知方法的基本原理,给出了其中的一些约束问题和估计方法, 并介绍压缩感知理论的相关问题———矩阵填充,最后讨论了其未来可能的应用前景. (According to the conventional Shannon s sampling theorem,in order to represent the analog signal,the sampling rate should not be less than twice the Nyquist sampling rate.Howev- er,this theorem only makes use of the bandwidth information.As a result,the collected data contain many redundant information.The recently proposed sampling method,compressed sens- ing or compressive sampling(CS),can collect compressed data at the sampling rate much lower than that needed in Shannon s sampling theorem by exploring the compressibility of the signal. This paper presents a review on the basic theory of CS.Some of the restrictions and recovery methods in CS are also discussed.Finally,some potential applications based on CS are presented. )

说明：  逆变电路，matlab simulink 仿真，适合新手入门电力电子器件仿真(Inverter circuit, matlab Simulink simulation, suitable for novice power electronic device simulation)

利用abaqus分析不同铺层的复合材料层合板的圆孔应力集中问题。(Using ABAQUS to analyze the stress concentration problem of circular hole in composite laminates with different ply.)

不同信噪比情况下的能量检测方法的检测概率(energy detection)