get_roots

设计音频降噪算法，并用MATLAB仿真实现。 1）读入一段音频后添加噪声，必须包括两种不同的噪声，信噪比：0dB~10dB； 2）分别采用滑动平均滤波器，直接频域滤波，以及谱分析后设计滤波器滤波三种方法实现，并对比效果。 3）给出各种方案的设计依据、代码、频响曲线，以及输入输出对比图。(Audio noise reduction algorithm design, and use MATLAB Simulation. 1) Read after adding noise into an audio, it must include two different kinds of noise, SNR: 0dB ~ 10dB 2) respectively moving average filter directly in the frequency domain filtering, and the filter is designed to achieve three methods filter after spectral analysis and contrast. 3) Give the design basis, code, frequency response curve, and input and output comparison chart of the various programs.)

主要介绍了遗传算法在matlab中实现方式并利用了英国一所大学所用遗传工具箱。(ntroduces genetic algorithm implementation in matlab using a British university used genetic toolbox.)

对TD-SCDMA做了一个简化的仿真，主要包括QPSK调制，扩频。结果有误比特率的值和眼图，绝对可用！(A simplified simulation of TD-SCDMA, including QPSK modulation, spreading. Result of the value of the bit error rate and eye diagram, absolutely free!)

说明：  BCH码的仿真，系统自带库函数BCHencode和BCH的code，支持任何非本原BCH和本原BCH码仿真，包含交织模块，支持matlab2017b以上(BCH code simulation, the system comes with library functions BCHencode and BCH code, supports any non-primary BCH and primitive BCH code simulation, including interleaving module, supports matlab2017b and above)

GUI_tips MATLAB GUI Tips Collated advice on construction of user interfaces by R. S. Schestowitz Imaging Science and Biomedical Engineering

计算区域分布指数，Moran指数，主要用于一国区域分布描述与分析(Regional distribution of index calculation)

mk突变点分析； 输入：x是数据序列；sy是起始年份或序号（做图的时候会用到）(mk point mutation analysis Input: x is a data sequence sy is the initial year or serial number (do figure it will be used))

以Logistic曲线为例,利用Matlab编程计算非线性回归模型(To Logistic curves were calculated using Matlab programming linear regression model)

本源码用于LDPC的编码算法。运用LDPC编码的基本原理，基于Matlab仿真实现。(The source code for LDPC coding algorithm. The use of LDPC coding the basic principles, based on the Matlab simulation.)

说明：  HFSS学习示例，十分有用，简单易懂，值得拥有(Learning example, simple and easy to understand, very useful, it is worth having )