mppt_zishiyingsuanfa

相位累加器，即DDS频率合成器的MATALB实现，采用M文件编写的S函数(Phase accumulator, that is, the DDS frequency synthesizer MATALB realized, the use of M' s S function documentation)

matlab code from friend shortest path (dijkstra)

hough变换检测椭圆的MATLAB程序(hough detection codes to detect shapes in images)

这是按照DTMB电视标准用matlab写的生成LDPC矩阵的源代码，可以运行。(This is a code that is in accordance with the standard DTMB TV source code, written in matlab to generate LDPC matrix and it can be run.)

说明：  C-C法重构相空间文件夹说明1.CC_Method_main.m - 程序主文件 2、LorenzData.dll - 产生Lorenz离散数据 3、normalize_1.m - 信号归一化 4、ccFunction.dll - 计算S(m,N,r,t)(C-C method reconstruction phase space folders note 1.CC_Method_main.m-procedure two main documents, LorenzData.dll- Lorenz have three discrete data, normalize_1.m-In a signal of 4, ccFunction.dll-calculated S (m, N, r, t))

说明：  matlab与信号系统电子书和相关书中代码(matlab and signal systems and related electronic code book)

OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术，实际上OFDM是MCM Multi-CarrierModulation，多载波调制的一种。其主要思想是：将信道分成若干正交子信道，将高速数据信号转换成并行的低速子数据流，调制到在每个子信道上进行传输。正交信号可以通过在接收端采用相关技术来分开，这样可以减少子信道之间的相互干扰 ICI 。每个子信道上的信号带宽小于信道的相关带宽，因此每个子信道上的可以看成平坦性衰落，从而可以消除符号间干扰。而且由于每个子信道的带宽仅仅是原信道带宽的一小部分，信道均衡变得相对容易。本程序实现OFDM与QPSK技术的比较(This program realization technology and the OFDM QPSK technology)

说明：  高通滤波器，带通滤波器，数字FIR滤波器(The Shannon entropy is a measure of the average information content one is missing when one does not know the value of the random variable. The concept was introduced by Claude E. Shannon in his 1948 paper "A Mathematical Theory of Communication". Shannon s entropy represents an absolute limit on the best possible lossless compression of any communication, under certain constraints: treating messages to be encoded as a sequence of independent and identically-distributed random variables, Shannon s source coding theorem shows that, in the limit, the average length of the shortest possible representation to encode the messages in a given alphabet is their entropy divided by the logarithm of the number of symbols in the target alphabet. )

说明：  matlab环境下的90个历程，从简单到复杂，覆盖了matlab所有功能(matlab course of the 90 conditions, from simple to complex, covering all functions matlab)

3G物理层调制和解调的演示仿真模型。 A simulation of physical layer of 3G communication system.(3G physical layer modulation and demodulation of the display simulation model. A simulation of physical layer of 3G communicat ion system.)