1_speed_control_pid

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)

内部连个文件，一个是多天线阵列的方向图，一个是多天线v-blast仿真程序，对学习波束成形的朋友有用。(Even within the files, a multi-antenna array pattern, a multi-antenna v-blast simulation program, to learn useful for beamforming friends.)

This is a comprehensive book about MATLAB coding for econometric applications. all engineers and economist who concern about econometric, should read it

给大家上传的一个基于matlab的仿真程序，希望大家看看(For everyone to upload a matlab-based simulation program, let us look at)

自己编写的基于放射投影变换APA的回波消除算法(APA radiation projection transform based echo cancellation algorithm to write your own)

地震资料处理中一些简单的操作，绘图程序等。(seismic data processing)

Dialog for opening fingerprint files Honors Project bwuzhili comp sci HKBU last update 19/April/2002

粒子群算法优化函数，取得很好的精度，满足了学习的要求！(Particle swarm optimization function, to achieve good accuracy)

在用遗传算法解决航天器轨道调度优化任务中，求每天初始生成路径的速度增量与燃料消耗量(solve lambet problem)

基于IMM多模型结构的带自适应渐消因子及衰减因子的无忌卡尔曼滤波器。 适用于非线性、模型不准确、噪声不确定情况下滤波(IMM multi-band adaptive model structure based on fading factor and the attenuation factor of the wild and the Kalman filter. Applies to non-linear model is not accurate, noise filtering uncertainty)