منابع مشابه
Discrete Fourier Transform on Multicores
This paper gives an overview on the techniques needed to implement the discrete Fourier transform (DFT) efficiently on current multicore systems. The focus is on Intel compatible multicores but we also discuss the IBM Cell, and briefly, graphics processing units (GPUs). The performance optimization is broken down into three key challenges: parallelization, vectorization, and memory hierarchy op...
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A. Table of contents by sections: 1. Abstract (you’re reading this now) 2. Summary of the DFT (How do I do the homework?) 3. Review of continuous-time Fourier series 4. Bandlimited signals and finite Fourier series 5. Sampling theorem for periodic signals 6. Review of quirks of discrete-time frequency 7. Orthogonality and its significance 8. Discrete Fourier Transform (DFT) 9. Use of DFT to com...
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1 Motivation We want to numerically approximate coefficients in a Fourier series. The first step is to see how the trapezoidal rule applies when numerically computing the integral (2π) −1 2π 0 F (t)dt, where F (t) is a continuous, 2π-periodic function. Applying the trapezoidal rule with the stepsize taken to be h = 2π/n for some integer n ≥ 1 results in (2π) −1 2π 0 F (t)dt ≈ 1 n n−1 j=0 Y j , ...
متن کاملThe Discrete Fourier Transform
Disclaimer: These notes are intended to be an accessible introduction to the subject, with no pretense at completeness. In general, you can find more thorough discussions in Oppenheim's book. Please let me know if you find any typos. In this lecture, we discuss the Discrete Fourier Transform (DFT), which is a fourier representation for finite length signals. The main practical importance of thi...
متن کاملDiscrete Fourier Transform
This note provides a brief review of the Fourier transform for the analysis of discretetime signals and systems and a description of practical assignments, which will be performed on a Texas Instrument DSP board. Some tasks are to be performed with the help of MATLAB. It is assumed that the student has enough theoretical background to perform the practical part of the work. The review of some a...
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ژورنال
عنوان ژورنال: IEEE Signal Processing Magazine
سال: 2009
ISSN: 1053-5888
DOI: 10.1109/msp.2009.934155