The combination of the time-discrete property of digital signals together with the commonly employed definition of the discrete Fourier transform (DFT) can cause ambiguity when interpreting magnitude spectra with respect to the physical unit of the signal under consideration. Standardized scaling of ...
Time Scaling of Discrete-Time Sequence Consider a discrete time sequence x(n) as shown in Figure-4. The time scaling for the discrete sequence can be defined as, 𝑥(𝑛) → 𝑦(𝑛) = 𝑥(𝑘𝑛) Case I– If k = 2, then 𝑥(𝑛) → 𝑦(𝑛) = 𝑥(2𝑛) Here, k...
Fig. 6. Detailed description of the proposed method for watermark embedding. DCT, discrete cosine transform; DWT, discrete wavelet transform; QIEA, quantum-inspired evolutionary algorithm; IDCT, inverse discrete cosine transform; IDWT, inverse discrete wavelet transform; SVD, singular value decomposition...
The field driven reversal of magnetic materials is known to occur via a series of discrete and sudden jumps in the magnetization, which are the Barkhausen avalanches69. Studies have revealed a power-law scaling behavior of the Barkhausen avalanches70,71, which connects them to a wide variety of...
This discrete list of Hurst/scaling exponents includes 0.025,0.05,0.075,0.1,…,0.9750.025,0.05,0.075,0.1,…,0.975. Moreover, we selected three different values for the Lévy index of the included fractional Lévy motion, i.e., 𝛼∈0.5,1.0,1.5α∈0.5,1.0,1.5. Next, for each of these ...
in MSHybrid and nVidia Optimus (integrated GPU + discrete GPU) laptops where the integrated GPU is managing display properties. One of such laptops is reportedly MSI GS65 Stealth 9SG where the Intel UHD Graphics 630 GPU integrated into the Intel i7-9750H CPU is combined with the mobile discr...
A signal time-scaling arrangement utilises a known configuration comprising the use of a laser which has its wavelength varied over time, a modulator coupled to the laser and to a modulating analogue electrical source and a dispersion means coupled to the output of the modulator and providing at...
The discretization of continuous media involves dividing the medium into discrete units or elements that can be represented using discrete variables. In the context of electrical circuits, this can involve dividing continuous electrical fields or currents into discrete components such as resistors, ...
展开 关键词: Discrete Fourier transforms Doppler effect Frequency-domain analysis OFDM Receivers Transmitters Underwater acoustics 会议名称: IEEE International Conference on Communications 会议时间: 10 September 2015 主办单位: IEEE 被引量: 5 收藏...
This article is concerned with robust stability analysis of discrete-time systems and introduces a novel and powerful technique that we call noncausal linear periodically time-varying (LPTV) scaling. Based on the discrete-time lifting together with the conventional but general scaling approach, we are...