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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.)

光栅图形矢量化方法分析与评价,一篇不错的书籍(Raster graphics vector analysis and evaluation methods, a good book)

说明：  自相关法求取时间序列延时的函数，包括Simulink产生时间序列的文件，两个主函数，以及运行程序(Since the correlation function to obtain time series of delay, including time series generated Simulink file, the two main functions, and operational procedures)

good code.to activate your accountto activate your account

the Matlab project used for biorthogonal wavelet transformation. A biorthogonal wavelet is a wavelet where the associated wavelet transform is invertible but not necessarily orthogonal.

雷达系统分析matlab程序，西电的，大家懂得(Radar Systems Analysis Matlab program, Western Electric, we understand)

ULPI UTMI conversion

wiener fitter emulation

通过matlab代码，大学数值分析算法，多姿态，多角度，有不同光照。( By matlab code, University of numerical analysis algorithms, Much posture, multi-angle, have different light.)

说明：  matlab实现遗传算法，代码超多，共参考。(realize matlab genetic algorithm, super-multi-code, a total of reference.)