pde3

说明：  By using this we can implement a code division multiple access modem system

svpwm of open loop three level inverter

QPSK及16QAM调制下的stbc，仅供初学者学习交流使用(QPSK and 16QAM modulation of the stbc, only for beginners to learn to share their)

DTMF(双音多频)是用两个特定的单音频组合信号来代表数字信号的一种编码技术。两个单音的频率不同，代表的数字或实现的功能也不同。可采用8种频率代表电话机上的16个按键，10个数字键0~9和6个功能键*、#、A、B、C、D。具体的频率组合见参考书。要求： (1) 根据键盘输入的符号，利用MATLAB产生对应的DTMF信号；(2) 分别利用FFT算法和Goertzel算法计算该DTMF信号的频谱并画出频谱图；(3) 根据频谱图确定DTMF信号所代表的符号是否和输入的符号一致。 (DTMF (Dual Tone Multi-Frequency) is a single with two specific combination of audio signals to represent a kind of digital signal coding techniques. Two monosyllabic different frequency, on behalf of the numbers, or the realization of the functions are also different. Eight kinds of frequency of use on behalf of telephone on the 16 keys, 10 numeric keys 0 ~ 9 and 6 function keys*,#, A, B, C, D. The frequency of specific composition of reference books. Requirements: (1) According to the keyboard input of symbols, the use of MATLAB have a corresponding DTMF signal (2), respectively, using FFT algorithm and the Goertzel algorithm DTMF signal spectrum and frequency spectrum draw (3) According to DTMF signal frequency spectrum to determine represented by symbols and input symbols unanimously.)

add kml file to matlan

此文件夹包含了无线传感器网络中的几个经典模型leach,HEED, 分簇算法(This folder contains several classic models of wireless sensor network leach, HEED, clustering algorithm)

循环普，用于检测信号，有一定的效果，希望对大家有用(ofdm detection)

说明：  大地电磁一维正反演MATLAB程序.doc 讲解挺细致的不错(One-dimensional magnetotelluric inversion program MATLAB. Doc explain the very good and detailed)

image processing in implementation in matlab

1.地球同步轨道卫星，倾角分别为0，30，90度。 (1 satellites in geosynchronous orbit, respectively 0,30,90 degrees inclination.)