A hybrid Sphere Decoding for short polar codes using variable step size

Zhang Si-Yu; Shahrrava Behnam

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A hybrid Sphere Decoding for short polar codes using variable step size

机译：A hybrid Sphere Decoding for short polar codes using variable step size

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摘要

In this paper, a hybrid stack Sphere Decoding (SD) for short polar codes based on radius extension and a novel path metric (PM) is proposed. The proposed SD scheme utilizes variable step size obtained from a novel PM, which is a modified PM from a previous work. The proposed method continuously increases the corresponding variable radius until a valid polar codeword is found. Moreover, by introducing a limited size stack, the proposed scheme can avoid node revisiting and achieve a trade-off between performance and complexity. Simulation results show that for short polar codes, compared with existing SD schemes that achieve maximum likelihood (ML) performance, the proposed scheme achieves more complexity reduction without compromising the ML optimality. (C) 2021 Elsevier B.V. All rights reserved.

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来源
《Physical communication》 |2021年第12期|101466.1-101466.8|共8页
作者
Zhang Si-Yu; Shahrrava Behnam;
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作者单位

Beijing Informat Sci & Technol Univ, Beijing, Peoples R China;

Univ Windsor, 401 Sunset Ave, Windsor, ON, Canada;

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正文语种英语
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关键词
Polar code; Maximum likelihood; Sphere decoding; Path metric; Stack; Complexity reduction;

A hybrid Sphere Decoding for short polar codes using variable step size

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