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awgn
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.)
- 2008-12-24 20:12:16下载
- 积分:1
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pujianfa_1
语音增强谱减法程序,已经运行成功,效果明显(Spectral subtraction speech enhancement program has been run successfully, obvious effect)
- 2010-07-29 20:39:28下载
- 积分:1
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forecast
利用matlab软件建立模型,利用ARMA模型对数据进行预测(Using matlab software to model the data using the ARMA model prediction)
- 2013-08-09 17:36:49下载
- 积分:1
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matlab
这个压缩包主要介绍了matlaB的基础和应用,里面是一些基础内容(matlaB )
- 2012-05-15 23:00:27下载
- 积分:1
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newton_raphson_polynom
newton raphson polynomial with matlab in short code
- 2012-05-28 13:12:13下载
- 积分:1
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九电平模块化多电平变换器(MMC)Ninelevel_mmc
说明: 九电平模块化多电平变换器(MMC)的matlab仿真simulink(Matlab simulation of nine level modular multilevel converter (MMC))
- 2021-04-20 15:28:50下载
- 积分:1
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PID_Controller_Design
《PID Controller Design》PID控制器设计的经典教程,内涵大量实例(《PID Controller Design》)
- 2010-01-05 10:43:17下载
- 积分:1
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Cooperative_Spectrum_Sensing
认知无线电频谱感知方面的文章,希望对你有用(Cognitive radio spectrum sensing for articles, I hope useful to you)
- 2010-05-12 14:15:03下载
- 积分:1
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weinakaerman
维纳和kaerman滤波其设计,源程序 ,用MATLAB编的,很不错(Wiener filter is designed)
- 2011-06-16 21:39:45下载
- 积分:1
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clk
用MATLAB编写的时钟,希望对感兴趣的人有用(a clock code with matlab , hope useful to the one interested~)
- 2012-05-30 23:41:55下载
- 积分:1