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ARTnn
- 输入信号五个基于瞬时信息的特征：零中心归一化瞬时幅度功率谱密度的最大值,零中心归一化瞬时幅度绝对值的标准偏差，零中心非弱信号段瞬时相位非线性分量绝对值标准偏差，零中心非弱信号段瞬时相位非线性分量标准偏差，零中心归一化的非弱信号段瞬时频率绝对值的标准偏差，得到识别出的信号类别，本例为2PSK, 4PSK, GMSK, OQPSK, pi/4DQSK中的一个，还可以看Art网络的扩展性。-input signal instantaneous information on five character
featrue7
- 提取信号七个基于瞬时信息的特征：零中心归一化瞬时幅度功率谱密度的最大值,零中心归一化瞬时幅度绝对值的标准偏差，零中心非弱信号段瞬时相位非线性分量绝对值标准偏差，零中心非弱信号段瞬时相位非线性分量标准偏差，零中心归一化的非弱信号段瞬时频率绝对值的标准偏差，一个信号段的归一化瞬时频率功率谱密度的最大值，根据信号 QPSK 和16QAM在 XI 轴投影的不同表现，提出特征参数。-extract information based on the instan eous features : In the
GHT1
- 该程序主要是比较对信号分别进行希尔伯特变换HT和广义希尔伯特变换GHT所得到瞬时相位的比较，结果证明GHT较HT对信号有较好抗噪特性，同时瞬时相位也可以用来重构信号，但主要起了指示的作用。-We can get instantaneous phase of the signal by HT or GHT，and the results prove that GHT has better noiseproof feature,namely robustness than HT.In the mea
shunshipinlvtiqu
- 瞬时相位法线性调频信号瞬时频率提取技术研究matlab程序并附有一篇找到的论文-a matlab program Instantaneous Phase Linear FM signal instantaneous frequency extraction technique together with a paper
identify
- 通信信号的调制信息包含在信号的瞬时幅度、相位、频率的变化之中，不同的信号其频谱也呈现不同的特征，通过提取瞬时幅度、相位、频率以及频谱的参数统计特征，可以识别不同的通信信号。通常是利用对瞬时幅度、瞬时相位，瞬时频率和信号功率谱进行某种变换而得到可以明显区分各种信号的特征参数。-Communication signal modulation information is contained in the signal instantaneous amplitude, phase, frequency
2ASK
- 提取调制信号2ASK的瞬时幅度、瞬时相位、瞬时频率-2ASK modulation signal extracted instantaneous amplitude, instantaneous phase, instantaneous frequency
tiaozhi_shibie
- 调制识别的传统算法， 零中心归一化瞬时幅度的谱密度的最大值 零中心归一化瞬时幅度绝对值得标准偏差 零中心非弱信号段瞬时相位非线性分量绝对值的标准偏差 零中心非弱信号段瞬时相位非线性分量的标准偏差 零中心归一化非弱信号段瞬时频率绝对值得标准偏差-Traditional modulation recognition algorithm, the zero center owned by an instantaneous amplitude of the spectral dens
HHT2
- Hilbert变换只是单纯地求信号的瞬时振幅，频率和相位，有可能出现没有意义的负频率；HHT变换先将信号进行EMD分解，得到的是各个不同尺度的分量，对每一个分量进行Hilbert变换后得到的是有实际意义的瞬时频率。 -imagesc(t,fliplr((1:size(im,1))/(2*size(im,1))),im,[inf,0]) set(gca, YDir , normal ) xlabel([ time ]) ylabel([ normalized f
phrase
- MATLAB中关于信号瞬时相位和瞬时频率的提取的代码，值得学习，很实用-MATLAB code on the extracted signal instantaneous phase and instantaneous frequency, it is worth learning, it is practical
Frank_signal_QPSK
- 产生脉内Frank相位编码调制信号，并对其进行平方、四次方变换，利用四次方FFT结果为单频信号的特点完成调制识别，最后绘图观察其瞬时相位曲线。-Generating pulse code modulation signal within Frank polyphase, and its square, four square transformed by FFT results for the fourth power single-frequency signal modulation cha
instantprocess
- 希尔伯特变换可以对信号进行取包络，提取相位曲线，瞬时频率曲线-Hilbert transform can take the signal envelope curve extraction phase, instantaneous frequency curve and so on
S_AM
- 产生AM调制信号，并且计算该信号频谱，瞬时相位，瞬时频率-Generates an AM modulated signal, and calculates the signal spectrum, the instantaneous phase, and the instantaneous frequency
S_FM
- 产生FM调制信号，并且计算该信号频谱，瞬时相位，瞬时频率-Generates the FM modulation signal, and calculates the signal spectrum, the instantaneous phase, and the instantaneous frequency
S_DSB
- 产生DSB调制信号，并且计算该信号频谱，瞬时相位，瞬时频率-Generates the DSB modulation signal, and calculates the signal spectrum, the instantaneous phase, and the instantaneous frequency
S_ASK
- 产生ASK调制信号，并且计算该信号频谱，瞬时相位，瞬时频率-Generates the ASK modulation signal, and calculates the signal spectrum, the instantaneous phase, and the instantaneous frequency
hilbert
- 信号的希尔伯特变换，提取信号包络 瞬时频率以及瞬时相位(Hilbert transform of signal)
hilberttransform
- 信号的希尔伯特变换 可以提取信号的顺时针夫 瞬时相位 瞬时频率(Hilbert transform of signal can extract the instantaneous frequency of clockwise instantaneous phase of signal)