Algorithms for Discrete Fourier Transform and Convolution by Richard Tolimieri PDF

By Richard Tolimieri

ISBN-10: 0387982612

ISBN-13: 9780387982618

This graduate-level textual content offers a language for figuring out, unifying, and imposing a wide selection of algorithms for electronic sign processing - particularly, to supply ideas and approaches that could simplify or maybe automate the duty of writing code for the latest parallel and vector machines. It therefore bridges the distance among electronic sign processing algorithms and their implementation on a number of computing structures. The mathematical proposal of tensor product is a routine topic in the course of the ebook, on account that those formulations spotlight the knowledge stream, that is specifically very important on supercomputers. as a result of their significance in lots of functions, a lot of the dialogue centres on algorithms regarding the finite Fourier rework and to multiplicative FFT algorithms.

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Extra resources for Algorithms for Discrete Fourier Transform and Convolution (Signal Processing and Digital Filtering)

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7) More generally, if x is a vector of size N, then y = P(N, M)x satisfies Mat2x m (Y) = (Matm x 2 (x))t. The matrix P(N, M) is usually called the perfect shuffle. It strides through x with stride of length M. 3 Take N = 4. Then 1000 0010 P(4, 2) = [ 0 1 0 0 0001 xe x2 P(4' 2)x = xi • 13 34 2. 4 Take N = 8. 5 P(6, 3) Take N = -1 0 0 0 P(8, 4)x = x5 X2 X6 X3 _X7 = 6. Then 0 0 1 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 o 0000 _0 xo x4 0 0 x3 P(6, 3)x = 0 1_ x1 • X4 X2 _X5 _ Suppose now that N = ML. 8) where a and b are arbitrary vectors of sizes M and L.

9. Continuing the notation and using the result of problem 8, define integers ei, e2, , er satisfying 0 < ek < N,1 < k < r, ek 1 mod Nk,1 < k < r, ek 0 mod Ni,1 < k,1 < r, k 01. These integers are uniquely determined by the above conditions and form the system of idempotents corresponding to the factorization given in problem 8. 10. 6: e2k ek mod N,1 < k < r, ek 0 mod N,1 < k, 1 < r, k 1, E ek 1 mod N. k=1 11. Define the CRT ring-isomorphism of the direct product Z/Ni x Z/N2 x • • • x Z/Nr onto Z/N 'and describe its inverse 0-1.

We call d(x) the greatest common divisor of f(x) and g(x) over F and write d(x) = (f (x), g(x)). By the divisibility condition above, (f (x), g(x)) =- a(x) f (x) b(s)g(x), where a(x) and b(x) are polynomials over F . 22) for some polynomials ao(x) and bo(x) over F. Arguing as in section 2, we have the following corresponding results. 9 If f (x) I g(x)h(x), (f (x), g(x)) = 1, then f (x) I h(x). 7 (Unique Factorization) If f (x) is a polynomial over F, then f(x) can be written uniquely, up to an ordering of factors, as f (x) = apV (x) • • • gr (x), where a E F, pi(x), , pr(x) are nicrnir irreducible polynomials over F and al > 0, , > 0 are integers.

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Algorithms for Discrete Fourier Transform and Convolution (Signal Processing and Digital Filtering) by Richard Tolimieri


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