Results 91 to 100 of about 17,540,816 (185)

A Signal Driven Adaptive Resolution Short-Time Fourier Transform

, 2009
International audienceThe frequency contents of the non-stationary signals vary with time. For proper characterization of such signals, a smart time-frequency representation is necessary.
Laurent Fesquet, Fesquet, Laurent, Saeed Mian Qaisar, Marc Renaudin, Renaudin, Marc, Qaisar, S.-M.   +5 more
core   +1 more source

SHORT TIME FOURIER TRANSFORM PROBABILITY DISTRIBUTION FOR TIME-FREQUENCY SEGMENTATION

, 2006
Taking as signal model the sum of a non-stationnary deterministic part embedded in a white Gaussian noise, this paper presents the distribution of the coefficients of the Short Time Fourier Transform (STFT), which is used to determine the maximum ...
Millioz, Fabien, Martin, Nadine, Huillery, Julien   +2 more
core   +1 more source

Time-frequency analysis and autoencoder approach for network traffic anomaly detection

MethodsX
Detection of anomalies in network traffic is critical to mitigating cyber threats. This study integrates continuous wavelet transform (CWT), discrete-time Fourier transform (DTFT), short-time Fourier transform (STFT), and autoencoders to identify ...
Ruchira Purohit, Satish Kumar, Sameer Sayyad, Ketan Kotecha   +3 more
doaj   +1 more source

Analisis dan Implementasi Short Time Fourier Transform (STFT) dan Approximate String Matching pada Query-by-Humming [PDF]

, 2010
ABSTRAKSI: Music Information Retrieval (MIR) merupakan sebuah bidang ilmu untuk mengambil dan mengolah informasi dari file musik, dapat berupa metadata, ataupun konten, seperti nada, melodi dan tempo.
Pandapotan Christian
core  

A Mechanical Fault Identification Method for On-Load Tap Changers Based on Hybrid Time—Frequency Graphs of Vibration Signals and DSCNN-SVM with Small Sample Sizes

Vibration
In engineering applications, the accuracy of on-load tap changer (OLTC) mechanical fault identification methods based on vibration signals is constrained by the quantity and quality of the samples.
Yanhui Shi, Yanjun Ruan, Liangchuang Li, Bo Zhang, Yichao Huang, Mao Xia, Kaiwen Yuan, Zhao Luo, Sizhao Lu   +8 more
doaj   +1 more source

Perbandingan berbagai waktu-frekuensi musik Gong Timor menggunakan short time fourier transform dan continous wavelet transform [PDF]

, 2015
Analisis waktu – frekuensi pada musik Gong Timor memainkan peran penting dalam aplikasi pengolahan sinyal musik seperti pitch tracking dan transkripsi musik atau proses menotasikan sinyal musik.
Siki, Yovinia Carmeneja Hoar
core  

GNSS Code Multipath Short Time Fourier Transform Analysis

, 2018
GNSS pseudorange multipath errors cannot be analyzed with the Fourier transform as they are non-stationary, thus other tools must be used. The objective of this paper is to investigate short-time Fourier transform (STFT) performance in detecting GPS ...
umberto robustelli, giovanni pugliano
core   +1 more source

Robust Fractional Low-Order Multiple Window STFT for Infinite Variance Process Environment

IET Signal Processing
Mechanical fault vibration signal is a typical non-Gaussian process, they can be characterized by the infinite variance process, and the noise within these signals may also be the process in complex environments.
Haibin Wang, Changshou Deng, Junbo Long, Youxue Zhou   +3 more
doaj   +1 more source

Intrapulse Modulation Radar Signal Recognition Using CNN with Second-Order STFT-Based Synchrosqueezing Transform

Remote Sensing
Intrapulse modulation classification of radar signals plays an important role in modern electronic reconnaissance, countermeasures, etc. In this paper, to improve the recognition rate at low signal-to-noise ratio (SNR), we propose a recognition method ...
Ning Dong, Hong Jiang, Yipeng Liu, Jingtao Zhang   +3 more
doaj   +1 more source

Shift-invariance of short-time Fourier transform in fractional Fourier domains

, 2009
Fractional Fourier domains form a continuum of domains making arbitrary angles with the time or frequency domains on the time-frequency plane. Signal representations in these domains are related to the fractional Fourier transform (FrFT).
Durak, Lütfiye
core   +1 more source