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An efficient algorithm for a large Toeplitz set of linear equations

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An algorithm is presented which requires2n^{2} + 8n log_{2} n - ncomputations for solving a set ofnlinear Toeplitz equations for n = 2k, where k is a positive integer. The previously known algorithms require a minimum of 3n2computations. The major advantage of the algorithm is realized for those applications where the set of n Toeplitz equations Tx = c is to be solved for a different c and the same T for the unknown x. Each additional solution requires storing only (4n + 1) elements from the first solution and6n log_{2} n + 3ncomputations.

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Acoustics, Speech and Signal Processing, IEEE Transactions on  (Volume:27 ,  Issue: 6 )