Hermite Interpolation With Error Correction: Fields of Zero or Large Characteristic and Large Error Rate

Hermite Interpolation With Error Correction: Fields of Zero or Large Characteristic and Large Error Rate
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带纠错的 Hermite 插值:零或大特征和大错误率的字段

DOI:
10.1145/3452143.3465525
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发表时间:
2021
期刊:
ISSAC '21: Proceedings of the 2021 on International Symposium on Symbolic and Algebraic Computation
影响因子:
--
通讯作者:
Yang, Zhi-Hong
Yang, Zhi-Hong
中科院分区:
--
文献类型:
--
作者:
Kaltofen, Erich L.;Pernet, Clément;Yang, Zhi-Hong

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多重码解码器是基于带有误差校正的埃尔米特多项式插值。为了得到唯一的埃尔米特插值,我们假设标量域具有0或≥𝓁+1的特征,其中𝓁是被插值的多项式及其导数的值列表中导数的最大阶。对于特征为𝓁+1的标量场,当阶数≤D的多项式的值≤E错误时,插值的最小值为D+1+2E(𝓁+1)。假设标量场的特征值为0或≥D+1,我们给出了一种需要更少的值即可以容忍更多误差的纠错Hermite插值算法。我们的算法需要(𝓁+1)D +1 -(𝓁+1)𝓁/2 + 2E值。例如,我们考虑𝓁= 2。当错误率(错误数)/(评估数)≤0.16时,我们的新算法需要(4+7/17),D -(1+8 /17)个值,而多重解码需要25D+25个值。当错误率≤0.2时,我们的算法需要对特征为0或≥D+1的域进行5D-2次评估,而当D≥3时,对特征为3的域进行错误率为0.2的多重解码是不可能的。我们的算法基于Reed-Solomon插值,没有多重性,由于纠错所需的高冗余,这使得Hermite插值成为可能。
Multiplicity code decoders are based on Hermite polynomial interpolation with error correction. In order to have a unique Hermite interpolant one assumes that the field of scalars has characteristic 0 or ≥ 𝓁 +1, where 𝓁 is the maximum order of the derivatives in the list of values of the polynomial and its derivatives which are interpolated. For scalar fields of characteristic 𝓁+1, the minimum number of values for interpolating a polynomial of degree ≤ D is D+1+2E(𝓁+1) when ≤ E of the values are erroneous. Here we give an error-correcting Hermite interpolation algorithm that requires fewer values, that is, that can tolerate more errors, assuming that the characteristic of the scalar field is either 0 or ≥ D+1. Our algorithm requires (𝓁+1)D + 1 - (𝓁+1)𝓁/2 + 2E values.As an example, we consider 𝓁 = 2. If the error ratio (number of errors)/(number of evaluations) ≤ 0.16, our new algorithm requires (4+7/17),D - (1+8 /17) values, while multiplicity decoding requires 25D+25 values. If the error ratio is ≤ 0.2, our algorithm requires 5D-2 evaluations over fields of characteristic 0 or ≥ D+1, while multiplicity decoding for an error ratio 0.2 over fields of characteristic 3 is not possible for D ≥ 3.Our algorithm is based on Reed-Solomon interpolation without multiplicities, which becomes possible for Hermite interpolation because of the high redundancy necessary for error-correction.
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