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Evaluation of the polar code in different environments and for different maritime activities in the two polar regions

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Advances in polar Science 2020年第4期31卷 237-240页

作者： Meric KARAHALIL Burcu OZSOY Istanbul Technical University Maritime FacultyTuzlaIstanbulTurkey Scientific and Technological Research Council of Turkey(TUBITAK MAM) Polar Research Institute(KARE)GebzeIstanbulTurkey

Because of the decrease in sea ice coverage,maritime activities in the polar regions have increased steadily over the years and several issues related to maritime activities have *** is essential to understand these challenges because they could have serious political,environmental,and economic *** there are significant geographical and legal differences and differences in the types of activities between the Arctic and the Antarctic,a single International Maritime Organization polar code covers both *** this analysis,changes in polar regions are introduced,and the differences between the Arctic and Antarctic are *** differences in maritime activities in the two polar regions are then discussed,and the polar code is evaluated in terms of these differences.

关键词： polar regions sea ice maritime activities polar code

基于polar code的可见光通信信道编码研究

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基于Polar Code的可见光通信信道编码研究

作者：姚春梅山东大学

学位级别：硕士

在现代信息社会,无线通信技术发展迅猛,信息交互和传输更是日益繁多。然而,频谱资源逐渐受限,引起了频谱拥塞的问题。可见光通信正是由于丰富的频谱资源而受到广泛关注。另外,polar code是在理论上唯一能够达到香农极限的信道编码技术,... 详细信息

在现代信息社会,无线通信技术发展迅猛,信息交互和传输更是日益繁多。然而,频谱资源逐渐受限,引起了频谱拥塞的问题。可见光通信正是由于丰富的频谱资源而受到广泛关注。另外,polar code是在理论上唯一能够达到香农极限的信道编码技术,并且能有效降低传输误码率。因此,本文结合polar code的优势,主要研究基于polar code的可见光通信信道编码技术。本文充分调研了可见光通信的研究背景以及国内外关于信道编码技术的研究现状,详细介绍了可见光通信系统组成和调制技术,并具体介绍了五种主要的信道编码技术,包括线性分组码、卷积码、Turbo code、LDPC code和polar code,并分别介绍了各自的发展历程和编译码过程。本文针对polar code的编译码过程进行了深入研究,不仅将polar code应用到VLC系统中,还创新地提出了一种应用于VLC系统的改进型polar code编码方案。该方案主要针对传统编码结构中与或运算的较高复杂度进行了改进,在发射端将待发送的信号按照每个信道传输2个比特信息的方式,进行polar code原始核心编码原理的迭代过程,再通过两两与或运算获得与传统编码一致的输出信号,从而形成polar code的编码输出信号,再进行相应的信号传输。本文针对提出的新型方案进行了系统仿真和分析验证。首先,对比了 LDPC code和polar code在AWGN信道下的误码率性能,还分析了polar code在可见光通信信道中不同参数下的误码率性能,运用polar code信道编码技术能够提高通信系统的传输准确率,改善了系统性能。然后,分析了运算复杂度的性能,仿真验证了改进型polar code编码方案能够使计算量实现2的指数型降低,极大地降低了运算复杂度,提高了系统性能。

关键词：可见光通信 polar code 信道极化 LDPC code 运算复杂度

Application of polar code-Based Scheme in Cloud Secure Storage

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国际计算机前沿大会会议论文集 2020年第1期 676-689页

作者： Zhe Li Yiliang Han Yu Li College of Cryptographic Engineering Engineering University of PAPXi’an 710086ShaanxiChina

In view of the fact that the quantum computer attack is not considered in the cloud storage environment,this paper selects the code-based public key encryption scheme as the security protection measure in the cloud *** on random linear code encryption scheme,it employs the structure of the RLCE scheme and polar code polarization properties,using the polar code as underlying encoding scheme,through the method of RLCEspad,putting forward a kind of improved public key encryption scheme which considers semantic security and is resistant to adaptively chosen ciphertext *** improved scheme is applied to cloud storage to ensure that the storage environment will not be attacked by quantum computer while ensuring the confidentiality,availability and reliability.

关键词： Post-quantum cryptography polar code Random linear code encryption code-based scheme Cloud storage

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移动应用实践:polar code

中国信息化 2017年第1期 51-51页

作者：本刊编辑部

推荐理由:2016年11月17日凌晨结束的3GPP RAN1 87次会议的5G短码方案讨论中,经过艰苦卓绝的努力和万分残酷的竞争,以华为公司主推的polar code(极化码)方案,成为5G控制信道eMBB场景编码方案。目前极化码还没有写入5G标准,根据5G标准进程... 详细信息

推荐理由:2016年11月17日凌晨结束的3GPP RAN1 87次会议的5G短码方案讨论中,经过艰苦卓绝的努力和万分残酷的竞争,以华为公司主推的polar code(极化码)方案,成为5G控制信道eMBB场景编码方案。目前极化码还没有写入5G标准,根据5G标准进程,2017年3月之前,国际移动通信标准化组织3GPP对于5G标

关键词： polar code

polar codes based OFDM-PLC systems in the presence of impulsive noise

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High Technology Letters 2024年第2期30卷 188-198页

作者：周玉 LI Yue ZHAO Shuangshuang GAO Fan ZHOU Chao MU Zhuowen CHEN Rui Marketing Service Center of State Grid Jiangsu Electric Power Co. LtdNanjing 210000P.R.China College of Information and Communication Engineering Nanjing Institute of TechnologyNanjing 211167P.R.China

Power line communication(PLC)has the potential to become the preferred technique for providing broadband communication to homes and offices with advantage of eliminating the need for new wiring infrastructure and reducing the *** it suffers from the impulsive noise because it introduces significant time variance into the power line *** this paper,a polar codes based orthogonal frequency division multiplexing(OFDM)PLC system is proposed to deal with the impulsive noise and thereby improve the transmission ***,the impulsive noise is modelled with a multi-damped sine function by analyzing the time behavior of impulse *** the polar codes are used to combat the impulsive noise of PLC channel,and a low complexity bit-flipping decoding method based on CRC-aided successive cancellation list(CA-SCL)decoding algorithm is *** evaluate the proposed decoding algorithm and the results validate the suggested polar codes based OFDM-PLC scheme which can improve the BER performance of PLC with impulsive interference.

关键词： orthogonal frequency division multiplexing(OFDM) polar code impulsivenoise power line communication(PLC) bit-flipping

International code for ships operating in polar waters:challenges to polar shipping safety rules in China

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Advances in polar Science 2016年第3期27卷 146-153页

作者： LI Weifang HUANG Yan East China University of Political Science and Law Shanghai 200042China

Abstract With the sea-ice diminishing steadily in the polar regions, there has been growing interest in new transit routes through polar waters using cost-effective transportation. Among the international regulators over polar shipping, the International Maritime Organization （IMO） is the leading body concerned with drafting marine safety and environmental protection rules. The mandatory polar code （International code for Ships Operating in polar Waters） adopted by the IMO signals the consensus among maritime states to apply compulsory rules to vessels operating in Arctic and Antarctic waters. As the standing member of the IMO and a major global shipping power, China is preparing to adopt national regulatory standards to develop an adequate vessel infrastructure and crew training system. Proceeding in parallel with the developing polar shipping industry, China will also move ahead in comprehensive collaboration with the Nordic states regarding polar issues.

关键词： polar shipping marine safety IMO polar code China the Nordic countries

How to apply polar codes in high throughput space communications

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Science China(Technological Sciences) 2020年第8期63卷 1371-1382页

作者： FENG BoWen JIAO Jian WU ShaoHua ZHANG QinYu Communication Engineering Research Center Harbin Institute of Technology(Shenzhen)Shenzhen 518055China

This paper describes how to apply polar codes in high-throughput space *** high throughput space communications can enable terabit data rate capacity wideband wireless transmissions,and offer service availability of anywhere and *** paper investigates the channel characteristics in space *** channels are lossy,time-varying,intermittent,long-latency,and with imperfect channel state information(CSI).In order to make the polar codes suitable for the space channel,some improvements and designs on the polar codes are provided in this *** encoding and decoding methods of polar codes are discussed,which are the key to determine the *** describe some rateless polar coding schemes that can guide the construction of suitable codes for time-varying channels with no-CSI in long-haul ***,a high-rate parallel concatenation scheme of polar codes is introduced,which can improve the anti-interrupt ability of polar ***,in order to support the massive connectivity requirements of future space communication networks,polar-coded sparse-code-multiple-access(SCMA)schemes are investigated.

关键词： space communications polar code concatenated coding high throughput

polar codes: Encoding/decoding and rate-compatible jointly design for HARQ system

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Intelligent and Converged Networks 2021年第4期2卷 334-346页

作者： Qiaoli Zeng Quan Zhou Xiangkun He Youming Sun Xiangcheng Li Haiqiang Chen School of Computer Electronics and Information and Guangxi Colleges and Universities Key Laboratory of Multimedia Communications and Information ProcessingGuangxi UniversityNanning 530004China Department of Mechanical and Aerospace Engineering Nanyang Technological UniversitySingapore 999002Singapore

polar coding are the first class of provable capacity-achieving coding techniques for a wide range of *** an ideal recursive structure and many elegant mathematical properties,polar codes are inherently implemented with low complexity encoding and decoding *** the block length of the original polar construction is limited to powers of two,rate-compatible polar codes(RCPC)are presented to meet the flexible length/rate transmission requirements in *** RCPC codes are well-conditioned to combine with the hybrid automatic repeat request(HARQ)system,providing high throughput efficiency and such RCPC-HAPQ scheme is commonly used in delay-insensitive communication *** paper first gives a survey of both the classical and state-of-the-art encoding/decoding algorithms for polar *** the RCPC construction methods are discussed,including the puncturing,shortening,multi-kernel construction,***,we investigate several RCPC-HARQ jointly design systems and discuss their encoding gain and re-transmission diversity gain.

关键词： polar code rate compatible hybrid automatic re-transmission request polar coding/decoding

A simplified decoding algorithm for multi-CRC polar codes

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Journal of Systems Engineering and Electronics 2020年第1期31卷 12-18页

作者： YANG Haifen YAN Suxin ZHANG Hao REN Yan HU Xiangdong LIN Shuisheng School of Information and Communication Engineering University of Electronic Science and Technology of China

polar codes represent one of the major breakthroughs in 5G standard,and have been proven to be able to achieve the symmetric capacity of binary-input discrete memoryless channels using the successive cancellation list(SCL)decoding ***,the SCL algorithm suffers from a large amount of memory *** paper proposes an adaptive simplified decoding algorithm for multiple cyclic redundancy check(CRC)polar *** results show that the proposed method can reduce the decoding complexity and memory *** can also acquire the performance gain in the low signal to noise ratio region.

关键词： polar code successive cancellation list(SCL) cyclic redundancy check(CRC) adaptive decoding