commpccc_dqpsk

受光照影响的人脸预处理算法，使用小波变换和同态滤波(Affected by light Face preprocessing algorithm, using wavelet transform and homomorphic filtering)

3D-MIMO信道模型 仿真代码 可由此建立LTE现今采用的3DMIMO模型(3D-MIMO channel model simulation code can thus establish 3DMIMO model today adopted LTE)

双峰法，迭代法，最大熵阈值分割，初学者，大家共同交流学习！(rs image matlab iamge segmentation)

simulations of adaptive algoritams and dravinsgs of sine wave for those alkgorithms

BPSK和PM在matlab环境下进行的波形的仿真对比(BPSK simulation comparison and PM)

this is good reference code for design

农作物病虫害图像识别MATLAB程序，对四个等级的病虫害进行训练，完成训练模型后识别率较高。(Image recognition MATLAB program crop pests, diseases and pests of the four levels of training, after completion of the training model high recognition rate.)

永磁同步电动机直接转矩控制系统研究，内容新颖，浅显易懂(Permanent Magnet Synchronous Motor Direct Torque Control System, innovative, and easy to understand)

通信的数字化是它能与计算机技术和数字信号处理技术相结合的基础，而实现通信数字化的前提是信源能提供的各种用于传递的消息，例如语音、图像、数据、文字等都必须以数字化形式表示。而信源编码是数字通信系统中的重要组成部分，他是保证信号有效传输的一种重要方式。霍夫曼编码依据字符出现的概率来构造异字头的平均长度最短的码字，有时称之为最佳编码，其优越的性能被广泛使用在数字通信系统中。霍夫曼编码已经成为数据压缩的灵魂算法。本文介绍了无失真编码算法的构造，霍夫曼编码的规则和特点，同时分析了对信源进行优化的方法，最后通过MATLAB仿真来讨论比较二元霍夫曼编码、三元霍夫曼编码以及信源扩展编码的效率，来实现霍夫曼码的优化构造。(The digital communication is it can and computer technology and digital signal processing technology in combination of the base, and realize the digital communication is the premise of source can provide all kinds of used to deliver news, such as voice, video and data and text must take the digital form said. And the source coding digital communication system is the important component, he is to ensure the effective transmission signal is an important way. Huffman coding based on the probability of characters appear to construct different "the average length of the shortest code words, sometimes called the best coding, superior performance is widely used in digital communication system. Huffman coding has become the soul of data compression algorithm. This paper introduces the structure of the encoding algorithm without distortion, Huffman coding rules and characteristics, and analysis of the source of the optimization method, and finally by MATLAB simulation to discuss compares two yu)

一种改进的粒子群算法，有效进行最值寻优，实测可行。(a improved PSO algorithn)