网络时频谱 网络释义 1. 时频谱 3.时频谱(Time-frequency spectrum),可藉由EMD分析结果做希伯转换(Hilbert Transform)将资料展现於时间-频率座标上,表现 … www.ancad.com.tw|基于3个网页 例句
网络时频域;为时频域 网络释义 1. 时频域 ...出,是一个以小波为基底的线性转换,得以将讯号变换至时频域(Time-Frequency Domain)上。 zh.wikipedia.org|基于3个网页 2. 为时频域 ...叶转换 短时富力叶转换之使用有别於一般富力叶转换,为时频域(Time-Frequency Domain)讯号处理技术之一,其转换所选择 … ...
oscillation events in single trials that may be hidden in the averaged time-frequency spectrum by other methods. Fig. 1: Sketch of time-frequency uncertainty in Fourier (STFT), wavelet (CWT), and superlet (SL) analysis. $$\begin{array}{*{20}{c}} {\psi _{f,\,c}\left( t \right)...
In cognitive radio systems, Dynamic Spectrum Leasing (DSL) can improve the efficiency of spectrum utilization. In DSL, the primary user who has the license for a part of the bandwidth, decides to lease it to a secondary user or not. In this paper, we assume an OFDM-based system and perf...
Qt after deeply studying the principle of GST,and it reflects the high time-frequency focusing properties of GST through comparing the stationary signal and non-stationary signal.Finally,the method is used to analyze the timefrequency spectrum of the actual logging signals,and obtain a good result...
In this paper, we propose a novel RF fingerprint based on singular values and singular vectors of time-frequency spectrum with extremely little demand of priori information and introduce a better suited classifier known as Gaussian Mixture Model compared to support vector machine. A communication ...
1) time-frequency spectrum 时频能量谱 1. Thetime-frequency spectrumcalculated by wavelet transform is calledtime-frequency spectrumof wavelet transform(TFSWT). 小波时频能量谱是在小波变换时频分析基础上 ,计算小波频谱能量。 2) time-frequency
1) time-frequency characteristic spectrum 时频特征谱1. The time-frequency characteristic spectrum of ground motions is presented first. 采用在频域内具有极好紧支性和盒形特性的谐小波作为母小波,推导出基于离散谐小波变换的地震波时变谱连续解析表达式,并提出了能反映地震波的时频特征以及与结构地震反应非常...
A non coorperation communication environment such as in the HF(High Frequency)spectrum is when the signals present are unknown in nature.This is essentially true spectrum monitoring that is an activity in spectrum management and intelligence gathering.An instrument that is used for this purpose is a...
Hilbert time-frequency spectrum entropy together with Hilbert spectrum gravity center to construct classification vector is demonstrated in detail. 论述了采用Hilbert时频谱熵与Hilbert时频谱重心构建识别向量,应用支持向量机进行设备状态识别的方法,并以滚动轴承的故障诊断为例证明方法的有效性分析。2...