نتایج جستجو برای: recursive fourier
تعداد نتایج: 89218 فیلتر نتایج به سال:
Since the invention of the mobile phone, a new generation of mobile communication standard has emerged every 10 years. Upgrading the technology of mobile networks in all areas takes few years. Hence, mobile phones should support the previous communication standards as well as the latest standards. Realizing a multi-standard mobile phone by multiple transceivers in parallel is neither a size-eff...
In a practical training for the Faculty of Electrical Engineering at Eindhoven University of Technology, a literature search to the past developments concerning the Phase Correlation algorithm was carried out and the algorithm was implemented. The Phase Correlation algorithm is a method for measuring the motion in a video sequence, based on the Fourier shift theorem. It was found that an enhanc...
In a practical training for the Faculty of Electrical Engineering at Eindhoven University of Technology, a literature search to the past developments concerning the Phase Correlation algorithm was carried out and the algorithm was implemented. The Phase Correlation algorithm is a method for measuring the motion in a video sequence, based on the Fourier shift theorem. It was found that an enhanc...
Doppler ultrasound is widely used in medical applications to extract the blood Doppler flow velocity in the arteries via spectral analysis. The spectral analysis of non-stationary signals and particularly Doppler signals requires adequate tools that should present both good time and frequency resolutions. It is well-known that the most commonly used time-windowed Fourier transform, which provid...
The Split-Radix Fast Fourier Transform has the same low arithmetic complexity as related Conjugate Pair Transform. Both transforms have an irregular datapath structure which is straightforwardly expressed only in recursive forms. Furthermore, conjugate pair variant a complicated input indexing pattern requires existing iterative implementations to rely on precomputed tables. It however allows o...
In this paper, we use the tensor product notation as the framework of a programming methodology for designing block recursive algorithms. We first express a computational problem in its matrix form. Next, we formulate a matrix equation for the matrix of the computational problem. Then, we try to find a solution of the matrix equation such that the solution is composed of simple matrices. Finall...
Data structures PowerList, ParList and PList are efficient tools for functional descriptions of parallel programs, that are divide and conquer in nature. PowerList data structures were introduced by J. Misra, and then, J. Kornerup extend these structures to ParList and PList structures. In the introduction of this article these theories are briefly explained. The goal of this work is to develop...
In this paper, frequency selective surfaces (FSSs) are analyzed and designed. The analytical procedure is based on method of moments (MoM). The generalized minimal residual recursive method combined with fast Fourier transform (GMRESR-FFT) is utilized to accelerate the solution of the matrix equation. Our numerical results show that the GMRESR-FFT method can converge at least 3 times faster tha...
Because of the growing interest in real-time stability monitoring, there is a need for online methods that can detect off-nominal behavior in control systems. Therefore, we present a realtime frequency domain method for detecting oscillations in control systems. The method uses recursive Fourier transform for representing the measured time domain signal in frequency domain. Oscillations are the...
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