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arxiv: 1406.0053 · v1 · pith:I4JPDRLJnew · submitted 2014-05-31 · 💻 cs.IT · cs.SC· math.IT

Fast K\"otter-Nielsen-H{o}holdt Interpolation in the Guruswami-Sudan Algorithm

classification 💻 cs.IT cs.SCmath.IT
keywords algorithmguruswami-sudanholdtinterpolationotter-nielsen-hspeed-upasymptoticbivariate
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The K\"otter-Nielsen-H{\o}holdt algorithm is a popular way to construct the bivariate interpolation polynomial in the Guruswami-Sudan decoding algorithm for Reed-Solomon codes. In this paper, we show how one can use Divide & Conquer techniques to provide an asymptotic speed-up of the algorithm, rendering its complexity quasi-linear in n. Several of our observations can also provide a practical speed-up to the classical version of the algorithm.

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