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说明：  主要介绍QPSK的matlab编程，初步学习matlab语言在通信中的运用(the introduction of QPSK)

egion growing approach is the opposite of the split and merge approach: An initial set of small areas are iteratively merged according to similarity constraints. Start by choosing an arbitrary seed pixel and compare it with neighbouring pixels. Region is grown from the seed pixel by adding in neighbouring pixels that are similar, increasing the size of the region. When the growth of one region stops we simply choose another seed pixel which does not yet belong to any region and start again.

Test for LIU12 chaotic map image encode/decode algorithm. A-RGB-image-encryption-algorithm-based-on-DNA-encoding-and-chaos-map_2012_Computers-and-Electrical-Engineering paper

用matlab分析典型的洛伦茨动力系统的性质，讨论混沌分型等非线性系统的性质。(Matlab analysis with the typical nature of the Lorenz dynamical system discussed such chaos type properties of nonlinear systems.)

该文档给出了KALMAN滤波的MATLAB语言实现程序，希望对初学者有所帮助(The document gives the KALMAN filter MATLAB language program, want to help beginners)

ant colony algorithm for optimization of systems

用matlab实现最优化问题，内容包括计算基础、绘图基础及程序设计基础(Optimization problems, including the basis for calculation, drawing basic programming foundation using matlab)

一个原来绘制信号包络的函数，希望对大家有帮助(An original drawing signal envelope function, we want to help)

基于matlab的风电仿真 不是PSCAD的 好好利用吧(Matlab-based simulation of wind power is not a good use of it PSCAD)

主要用途是对抗多径衰落。由于多径衰落的存在，使得同一个帧由于路径不同，到达用户端的时延有先有后。在相关的频域上的会造成子载波之间的相互干扰，影响 性能。另外，由于有了循环前缀，使得IFFT FFT操作把原来的线性卷积变成循环卷积，大大简化了相应的信号处理复杂度(The main purpose is to fight against multipath fading. Due to the presence of multipath fading, the first after they have the same frame different paths to reach the client delay. Would cause mutual interference between sub-carriers in the frequency domain, affecting performance. In addition, thanks to the cyclic prefix, so IFFT FFT operation to the linear convolution of the original into a circular convolution, greatly simplifying the corresponding signal processing complexity)