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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.)

声卡采集的程序,可设置采样频率,位长,采样时间等参数.可采样8k-44.1kHz的信号,进行频谱分析.(sound card collection procedures, sampling frequency can be set up, elderly, Sampling time parameters. 8 k can be sampled- 44.1kHz signal spectrum analysis.)

最近在关注gui，这是在网上找到的基于matlab gui的扫雷游戏源码，适合入门级试验学习。(Recent concern about the gui, this is the Internet to find matlab gui-based source of mine game, suitable for entry-level pilot study.)

MATHEMATICAL CODE FOR SPEECH USING MATLAB

时隙ALOHA协议程序：实际产生的业务量，吞吐量，平均延迟 (Slotted ALOHA protocol procedures: the actual traffic throughput, average delay)

在机器学习中经常会用到支持向量机，该代码是再使用支持向量机前对数据进行主成分分析的代码(We often meet support vector machine in machine learning , the code is about the principal component analysis befor using support vector machine (SVM).)

fft与边际谱的对比，并画出hilbert图和三维时频谱图(compare fft with marginal spectrum and plot the hilbert figure and 3d time-frequency picture)

stator-flux oriented control of an induction motor under simulink

一个变步长仿射投影算法，包括论文及仿真代码，已调试通过(A variable step-size affine projection algorithm, including the papers and the simulation code, has been debugged)

Simulation for neural networks in matlab