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arXiv 1701.03397cs.ITmath.ITquant-ph
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适用于任意经典量子信道和任意cq-MAC的极化码

Polar Codes for Arbitrary Classical-Quantum Channels and Arbitrary cq-MACs

Rajai Nasser, Joseph M. Renes

摘要:

我们证明了任意经典量子(cq)信道的极化定理。输入字母表被赋予一个任意的阿贝尔群运算,并使用该运算应用一个Arıkan风格的变换。它示出,作为极化步骤的数量变得很大,合成CQ-信道的确定性同态信道的项目,其输入到一个商组的输入字母表。这个结果被用来构造极性码的任意cq信道和任意经典量子多址接入信道(cq-MAC)。编码器可以在$O(N\log N)$操作中实现,其中$N$是代码的块长度。提出了一种构造码的量子连续相消译码器。结果表明,该解码器的错误概率衰减速度比$2^{-N^β}$任何$β<\frac{1}{2}$。

英文摘要:

We prove polarization theorems for arbitrary classical-quantum (cq) channels. The input alphabet is endowed with an arbitrary Abelian group operation and an Arıkan-style transformation is applied using this operation. It is shown that as the number of polarization steps becomes large, the synthetic cq-channels polarize to deterministic homomorphism channels which project their input to a quotient group of the input alphabet. This result is used to construct polar codes for arbitrary cq-channels and arbitrary classical-quantum multiple access channels (cq-MAC). The encoder can be implemented in $O(N\log N)$ operations, where $N$ is the blocklength of the code. A quantum successive cancellation decoder for the constructed codes is proposed. It is shown that the probability of error of this decoder decays faster than $2^{-N^β}$ for any $β<\frac{1}{2}$.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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