simple_alloc

09年大学生数学建模比赛D组题，该作品获得专科组国家二等奖(2009 Mathematical Modeling Group D title game, the work received the second prize specialist group of countries)

实现数字音频效果的源程序，包含多速率信号处理的内插和抽取源程序。(realize the audio effect.inlude the function of multirate signal processing knowledge)

通过得到一个悬浮系统的状态空间表达式，求解Hinf控制器(the solution of Hinf controller)

image preprocessing and feature extraction

说明：  简介卫星姿态控制系统的模型，并针对该模型分析故障发生的特点，故 障诊断的难点，以及可能发生故障的部位和故障的类型，给出故障检测的方法。(Introduction of satellite attitude control system model and the model for the analysis of the characteristics of faults, fault diagnosis of the difficulties, and possible failure location and fault type, fault detection methods are given.)

dct隐写技术matlab实现资料。算法原理：通过在一个图像块中调整两个DCT系数的相对大小，隐藏秘密信息。 将载体图像分为8×8的块，做二维DCT变换 用来表示选中的两个系数的坐标对于第i bit秘密信息 if（要隐藏信息‘1’） make else make 逆DCT变换，还原图像 (dct steganography matlab implementation information. Algorithm principle: an image block by adjusting the relative size of the two DCT coefficients, hidden secret information. The vector image is divided into 88 blocks, making two-dimensional DCT transform coefficients used to represent the coordinates of the selected two for the first i bit secret information if (to hide information ' 1 ' ) make else make the inverse DCT, restore image)

说明：  matlab code from in the problem in numerical caculation.

OFDM的代码和模型，关于QAM和QPSK调制，两个都有哦，适合初学者学习(OFDM code and model, on QAM and QPSK modulation, two have, oh, suitable for beginners to learn)

用互相关原理实现控制系统的频率特性测试仿真，供大家参考。谢谢！！(Using the principle of inter-related control systems achieve the frequency characteristics of the test simulation, for your reference. Thanks! !)

AWGN Channel simulation with hamming coding. Modulation scheme is BPSK. BER curve is provided. (AWGN Channel simulation with hamming coding. Modulation scheme is BPSK. BER curve is provided.)