frequency domain filtering method
Polarization Filtering Method for Suppressing Surface Wave in Time Frequency Domain
... this method is that it depends on the selection of window length, and the polarization parame- ters are not time-varying ...time domain and frequency domain ...affecting filtering ...
10
High Resolution Image Encryption and Reconstruction Using Scalable Codes
... The frequency domain and adaptive filtering can be engaged in the encrypted area based on the homomorphic properties of a cryptography and a complex signal representation method can be used to ...
5
A Comparative Study on Medical Image Denoising in Hybrid domain
... denoising method”. The two main image denoising methods are spatial domain denoising and transform domain ...Spatial domain filters relies on low pass filtering on a group of pixels ...
5
A Cooperative Sensing Method Using Katz Fractal Dimension in Frequency Domain
... matched filtering detection, Cyclic feature ...used method, but this method has some limitations in the case of low ...this method requires a large amount of calculation, the calculation ...
7
Damage Visualization of Scattered Ultrasonic Wavefield via Integrated High-speed Camera System.
... visualization method employing Riesz transform (RT) as an image processing technique is developed on a stiffened curved composite ...space domain, is to obtain instantaneous orientation, phase and amplitude ...
215
Filtering in Time Frequency Domain using STFrFT
... the signal for a particular time instant, calculate its Fourier Transform and repeat it for the entire length of the signal. STFT is a simple and formidable method which uses the spectrum of a signal segment ...
5
On Choosing Fourier Transforms for Practical Geoscience Applications
... the frequency domain, and then tak- ing the inverse Fourier transform to obtain the output in the time domain (Figure ...time domain The frequency domain me is often used because ...
8
A comparison between modal damping ratios identified by NExT-ERA and frequency domain impact test
... Time domain methods maintain many advantages over their frequency domain counterparts and this fact is the main motivation for this ...time domain methods; therefore much less computer memory ...
10
REDUCTION OF PAPR IN OFDM SYSTEM USING REPEATED CLIPPING AND FILTERING TECHNIQUE WITH DIFFERENT MODULATION SCHEMES
... to Frequency Division Multiple Access (FDMA) in that the multiple user access is achieved by sub-dividing the available bandwidth into multiple channels, which are then allocated to ...center frequency of ...
6
Analysis on Sensitivity of Power System Stability to Generator Parameters
... system frequency curve shown in Figure 3, which is recorded by the simulation process supervisor and presents the status of power system ...system frequency curve oscillates severely and has already been ...
18
A Hybrid Feature Selection Method to Improve Performance of a Group of Classification Algorithms
... wrapper method, the weights of features are determined by how well the specific feature settings perform in classification ...Wrapper method could be Naïve Bayes classifier ...search method is ...
8
On the orthogonalised reverse path method for nonlinear system identification
... detecting frequency variation in coefficients; this is anticipated to prove interesting in situations like viscoelastic material dynamics and is being investigated ...
36
Frequency domain Elastic wave Simulation Based on the Nonoverlapping Domain Decomposition Method
... A for saving space. Solving (11) by a direct method is impractical when the system is huge. For this reason, various itera- tive methods, e.g. the Krylov subspace methods, are the interesting alternative. However, ...
6
RECOVERY OF EMG SIGNALS FROM THE MIXTURE OF ECG-EMG SIGNALS USING NON-STATIONARY HARMONIC MODELING
... and frequency changes in the ECG signal component by means of a time-variant harmonic structure whose mean fundamental frequency is kept constant in the analysis ...
9
Frequency-Domain Nonlinear Behavioral Modeling Using The Arithmetic Operator Method
... independent frequency domain ...new frequency domain construct rooted in a vector space has been developed which has some desirable statistical properties that will be discussed in Section ...
586
CT Image Denoising Based on Thresholding in Shearlet Domain
... Computed tomography (CT) is a powerful tool for medical diagnosis. Due to acquisition and transmission in CT imaging, the noise appears that leads to poor image quality. Noise reduction technique is applied in CT images ...
7
A Novel Temporal-Frequency Domain Error Concealment Method for Motion Jpeg
... and frequency-domain error concealment methods are investigated, in the section ...proposed method that is based on a novel mixture of temporal-domain and frequency- domain ...
12
Visible Image Watermarking Based On Texture and Luminance Blocks In DCT Domain – A Review
... general frequency sensitivity but also rely on adapting the watermark to local image properties in order to provide maximum performance in terms of robustness while maintaining the transparency ...
6
PAPR Reduction Based On Hadamard Technique in OFDM System
... OFDM is one of the multi-carrier modulation (MCM) techniques that transmit signals through multiple number of carrier signals .OFDM systems suffer a high peak- to-average power ratio of the transmitted signals, which ...
8
Speckle Reduction of SAR Images using Adaptive Sigmoid Thresholding and Analysis of various Filtering Techniques
... effective method for speckle reduction and image enhancement for SAR images is ...proposed method is the adaptive calculation of parameters with ease in adaptive sigmoid thresholding approach for removing ...
8