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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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sanciyangtiao
用matlab编写的实现三次样条插值法的代码，生成图像可显示第一节点，第二节点，误差点。(Written by matlab cubic spline interpolation to achieve the code to generate the image to show the first node, second node, the error point.)
- 2010-12-27 18:18:15下载
- 积分：1
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3
说明： 里面有经典的周期图法程序，还有改进的周期图法的程序，形成对比(There are classical periodogram program, as well as improved program cycle diagram method, in contrast to)
- 2014-12-22 14:38:59下载
- 积分：1
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coo_crs_cds
coo crs cds way to decomposition and their multiplication
- 2015-01-27 05:28:41下载
- 积分：1
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siziyoudujianxifengcha
车辆四自由度模型的MATLAB分叉图程序，简单明了。用来做分叉图分析(MATLAB bifurcation diagram program four degrees of freedom vehicle model, plain and simple. Used for bifurcation diagram analy)
- 2016-01-06 16:40:05下载
- 积分：1
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551843HCL
classification algorithms
- 2009-05-09 17:43:42下载
- 积分：1
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OFDM_MATLAB
OFDM —— OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术仿真。(OFDM- OFDM (Orthogonal Frequency Division Multiplexing) that is orthogonal frequency division multiplexing simulation.)
- 2009-12-14 20:45:59下载
- 积分：1
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Digital-signal-processing
Digital signal processing(Digital signal processing program contains a variety of signal processing algorithms)
- 2013-05-20 10:39:15下载
- 积分：1
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Data-type-conversion
这是Simulink关于数据转换仿真模型。希望对初学者有用(This is the Simulink simulation model about the data transformation. Hope useful for beginners
)
- 2014-02-16 19:23:41下载
- 积分：1
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新建文件夹
基于平均驻留时间分析方法的网络切换控制系统稳定性控制方法研究(Stability control method of network switching control system based on average dwell time analysis method)
- 2020-12-31 16:28:58下载
- 积分：1
