Description: 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。-Extraction based on instantaneous information signal of seven characteristics: zero center normalized instantaneous amplitude of the maximum power spectral density, zero-center normalized standard deviation of the instantaneous rate of absolute zero center section of non-weak signal instantaneous phase nonlinear component absolute value of standard deviation, non-zero center section of the weak signal non-linear component of the standard deviation of the instantaneous phase, zero-center non-normalized absolute value of the weak signal section of the standard deviation of the instantaneous frequency of a signal segment of the normalized power spectral density of instantaneous frequency maximum, according to the signal QPSK and 16QAM in the XI-axis projection of the different performance of the proposed characteristic parameters. Platform: |
Size: 8192 |
Author:潘涛 |
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Description: 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。-Extraction based on instantaneous information signal of seven characteristics: zero center normalized instantaneous amplitude of the maximum power spectral density, zero-center normalized standard deviation of the instantaneous rate of absolute zero center section of non-weak signal instantaneous phase nonlinear component absolute value of standard deviation, non-zero center section of the weak signal non-linear component of the standard deviation of the instantaneous phase, zero-center non-normalized absolute value of the weak signal section of the standard deviation of the instantaneous frequency of a signal segment of the normalized power spectral density of instantaneous frequency maximum, according to the signal QPSK and 16QAM in the XI-axis projection of the different performance of the proposed characteristic parameters. Platform: |
Size: 7168 |
Author:夏英杰 |
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Description: 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 changes, the spectrum of different signals also show different characteristics, by extracting the instantaneous amplitude, phase, frequency and statistical characteristics of the parameters of the spectrum, you can identify different communication signals. Usually by the use of instantaneous amplitude, instantaneous phase, instantaneous frequency and signal power spectrum a transformation which can be clearly distinguished by the characteristic parameters of various signals. Platform: |
Size: 4096 |
Author:JIA |
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Description: 通过希尔伯特变换获得地震记录的三瞬参数（瞬时相位，瞬时振幅，瞬时频率）。压缩包中的文件record-128-2048.dat为原始地震记录，128道，2048个采样点，2毫秒采样间隔。amp.dat pha.dat fre.dat分别为计算获得的瞬时振幅剖面，瞬时相位剖面，瞬时频率剖面，也都是128道 2048个点。其中的函数都可以很方面地移植到其他地方使用。-Obtained through the Hilbert transform instantaneous seismic records of the three parameters (instantaneous phase, instantaneous amplitude, instantaneous frequency). Compressed files in the package record-128-2048.dat original seismic records, 128, 2048 sampling points, 2 ms sampling interval. amp.dat pha.dat fre.dat were calculated profile of the instantaneous amplitude, instantaneous phase profile, instantaneous frequency profile, 2048 are also 128 points. One aspect of the functions can be ported to other places. Platform: |
Size: 1036288 |
Author:王老五 |
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Description: 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 density of the maximum zero center owned by one of the instantaneous amplitude is definitely worth the nonlinear component of the instantaneous phase of the absolute value of standard deviation of zero-center non-weak signal segment, standard deviation of zero center weak signal segment of the standard deviation of the nonlinear component of the instantaneous phase zero center owned by the instantaneous frequency of a non-weak signal segment is definitely worth the standard deviation Platform: |
Size: 2048 |
Author:王萦 |
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Description: This function computes Hilbert-Huang spectrum using Hilbert transform, the instantaneous frequency and the instantaneous amplitude for each IMF.
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Size: 3073024 |
Author:hafida |
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Description: 该文提出一种基于广义分数阶傅里叶变换和分数低阶Wigner-Ville 分布的数字调制识别新方法，该方法提取广义分数阶傅里叶变换的零
中心归一化瞬时幅度谱密度的最大值和分数低阶Wigner-Ville 分布幅度的最大值作为识别特征参数，并采用判决树分类器，实现了非高斯噪声下数字调制信号识别。-This paper presents a generalized fractional Fourier transform and fractional lower order Wigner-Ville distribution of new digital modulation recognition method, the method to extract generalized fractional Fourier transform, the center is one of the instantaneous amplitude spectral density The maximum amplitude values and fractional lower order Wigner-Ville distribution as an identifying characteristic parameters, and decision tree classifier, to achieve a non-Gaussian noise under digital modulation signal recognition. Platform: |
Size: 217088 |
Author:forevr |
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Description: 地震勘探复数道分析，利用这种方法，能方便地从地震记录中分离表示地震波动力学特征的若干参数，如瞬时振幅，瞬时相位，瞬时频率和视极性等。-The seismic exploration plural channel analysis, using this method, can be easily separated from the seismic records certain kinetic characteristics of seismic wave parameters, such as the instantaneous amplitude, instantaneous phase, instantaneous frequency and apparent polarity. Platform: |
Size: 14336 |
Author:yudanping |
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Description: HHT算法实现emd分解，及希尔伯特黄变换，实现瞬时频率瞬时幅值，边际谱的提取。-The HHT algorithm emd decomposition and Hilbert-Huang transform to achieve the instantaneous amplitude of the instantaneous frequency marginal spectrum extraction. Platform: |
Size: 6144 |
Author:罗忠运 |
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Description: 这是关于小波特征变换，其中这里的提取特征分为几个一是零中心归一化瞬时幅度的频谱最大值，二是包络平方值的两倍包络均值平方之差。三是瞬时频率的方差。四是大小波系数的方差，五是信号的四阶累积量之比。-This is the wavelet transform features, which extract features here is divided into several one is zero center normalized spectral maximum of instantaneous amplitude, the second is twice the value of the envelope squared envelope of the mean squared difference. Third, the variance of the instantaneous frequency. Fourth, the coefficient of variance of the size of the wave, five are fourth-order cumulant ratio of the signal. Platform: |
Size: 2048 |
Author:严璐 |
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Description: 包含有希尔伯特黄变换的主程序、边际谱的计算方法、并绘制了仿真信号的FFT频谱和功率谱，并调用emd分析方法，绘制了emd分解结果，以及瞬时包络和瞬时频率图，还有Hilbert-Huang谱和Hilbert边际谱-
Including the main program of the Hilbert Huang transform, marginal spectrum calculation method, and draw the simulation signal FFT spectrum and power spectrum, and call EMD analysis method, drawn EMD decomposition, and instantaneous amplitude and instantaneous frequency map and Hilbert spectrum and Hilbert marginal spectrum Platform: |
Size: 844800 |
Author:李松 |
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Description: analog modulation techniques are:
Amplitude modulation (AM) (here the amplitude of the carrier signal is varied in accordance to the instan eous amplitude of the modulating signal)
Double-sideband modulation (DSB)
Double-sideband modulation with carrier (DSB-WC) (used on the AM radio broadcasting band)
Double-sideband suppressed-carrier transmission (DSB-SC)
Double-sideband reduced carrier transmission (DSB-RC)
Single-sideband modulation (SSB, or SSB-AM)
Single-sideband modulation with carrier (SSB-WC)
Single-sideband modulation suppressed carrier modulation (SSB-SC)
Vestigial sideband modulation (VSB, or VSB-AM)
Quadrature amplitude modulation (QAM)
-analog modulation techniques are:
Amplitude modulation (AM) (here the amplitude of the carrier signal is varied in accordance to the instantaneous amplitude of the modulating signal)
Double-sideband modulation (DSB)
Double-sideband modulation with carrier (DSB-WC) (used on the AM radio broadcasting band)
Double-sideband suppressed-carrier transmission (DSB-SC)
Double-sideband reduced carrier transmission (DSB-RC)
Single-sideband modulation (SSB, or SSB-AM)
Single-sideband modulation with carrier (SSB-WC)
Single-sideband modulation suppressed carrier modulation (SSB-SC)
Vestigial sideband modulation (VSB, or VSB-AM)
Quadrature amplitude modulation (QAM)
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Size: 96256 |
Author:mojtaba |
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Description: 软件无线电产生调制信号，并估计瞬时幅度、相位的二阶统计，使用神经网络对调制信号进行识别。-Software generates radio modulation signal, and estimates the instantaneous amplitude and phase of the second-order statistics, using a neural network to identify the modulation signal. Platform: |
Size: 3072 |
Author:苗馨远 |
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Description: 求地震数据的瞬时频率，瞬时振幅，瞬时相位的程序，对研究地球物理三瞬的同学很有帮助-The instantaneous frequency, instantaneous amplitude, and instantaneous phase of the seismic data are helpful for the study of geophysics. Platform: |
Size: 1024 |
Author:徐先生 |
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Search - instantaneous amplitude