A Survey on Belief Propagation Decoding of Polar Codes

来源 :中国通信(英文版) | 被引量 : 0次 | 上传用户:Ddaqdd
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The increasing data traffic rate of wire-less communication systems forces the development of new technologies mandatory. Providing high data rate, extremely low latency and improvement on qual-ity of service are the main subjects of next generation 5G wireless communication systems which will be in the people's life in the years of 2020. As the newest and first mathematically proven forward error correc-tion code, polar code is one of the best candidates among error correction methods that can be employed for 5G wireless networks. The aim of this tutorial is to show that belief propagation decoding of polar codes can be a promising forward error correction technique in upcoming 5G frameworks. First, we survey the novel approaches to the belief propagation based de-coding of polar codes and continue with the studies about the simplification of these decoders. Moreover, early detection and termination methods and concept of scheduling are going to be presented throughout the manuscript. Finally, polar construction algorithms, error types in belief propagation based decoders and hardware implementations are going to be mentioned. Overall, this tutorial proves that the BP based decod-ing of polar codes has a great potential to be a part of communication standards.
其他文献
Fuzzing is an effective technique to find security bugs in programs by quickly exploring the input space of programs.To further discover vulnerabilities hidden in deep execution paths,the hybrid fuzzing combines fuzzing and concolic execution for going th
通过可低压操作的NF膜和RO膜的高含盐模拟废水分离试验,本文探讨在不同进水pH条件下的脱盐效果,分析盐浓度对膜通量和脱盐率的影响。结果表明,在pH≥5条件下,RO膜对单价和二价无机盐的脱盐率均可至少达到85%,NF膜对二价盐的脱盐率可至少达到70%,但单价盐的脱盐率呈低值;在膜分离过程中,两种膜的膜通量和脱盐率随进水的盐浓度上升呈下降趋势。RO膜的膜通量对盐浓度变化的敏感度高于NF膜,但脱盐率的盐浓度变化敏感度则相反。
利用Gleeble热模拟试验机对FGH96合金进行了等温压缩试验,获得了变形温度为1020~1110℃、应变速率为0.001~1 s−1范围内合金的流变应力数据,结合本构方程回归分析方法,计算不同变形条件下的Zener-Hollomon(Z)参数值;选取典型的Z参数条件,系统分析Z参数对FGH96合金热机械处理(热压缩变形和热处理)过程中微观组织和性能的影响,并在此基础上提出优化的锻造工艺参数。结果表明:随着Z参数的减小,热变形态合金的动态再结晶程度逐渐提高、动态再结晶晶粒尺寸有所增
In this paper,we design a spatial modulation based orthogonal time frequency space(SMOTFS)system to achieve improved transmission reliability and meet the high transmission rate and highspeed demands of future mobile communications,which fully utilizes th
Routing plays a critical role in data transmission for underwater acoustic sensor networks(UWSNs)in the internet of underwater things(IoUT).Traditional routing methods suffer from high end-toend delay,limited bandwidth,and high energy consumption.With the
伴生放射性矿开发利用企业从事伴生矿产资源开发利用活动,其间,物料的天然放射性核素超过本底水平.在生产过程中,不同工艺流程和不同工作岗位的γ辐射空气吸收剂量率差异比较
在萃取实践中发现,钴会对羟肟萃取剂产生毒化,严重制约钴萃取冶金的应用和发展。介绍了羟肟萃取体系下钴萃取的发展现状,详细综述了羟肟萃取体系下钴的氧化和毒化行为及其机理,通过对比分析了钴在氨性介质溶液体系和羟肟萃取体系下的化学性质及行为,阐明钴对羟肟萃取剂毒化产生的原因。在此基础上,重点综述有机羧酸和有机磷酸对羟肟萃取体系下钴的毒化的抑制行为及机理,分析了有机磷酸/羟肟协萃体系下毒化被抑制的原因,指出当前在钴对羟肟萃取剂毒化及其抑制研究方面存在的问题与不足,展望未来该领域有待深入研究的方向与方法,为钴对羟肟萃
冶金工业作为国民经济发展的支柱,常见的冶炼技术有火法、湿法、电渣重熔、电子束熔炼和等离子体冶炼。等离子体具有热性能高、能量集中、化学活性高、冷却速度快和反应气氛可控等特点,已广泛的应用于熔炼、精炼和表面冶金。本文综述等离子技术在熔炼、精炼和表面冶金等领域的研究进展。其中,等离子体技术在熔炼和精炼中具有产品纯度高、功率可调、气氛可控、转化率与热利用率高和环境友好等优势;等离子体技术在表面冶金中具有涂层微观组织稳定、可获得传统工艺难以制备的合金层等特点。针对当下等离子体冶金技术存在设备寿命短、工艺参数难控制、
The rapid development of social technology has replaced physical interaction in the trading market.The implication of this technology is to provide access to the right information at the right time.The drawback of these technologies is that the eavesdropp
Behind the prevalence of multimedia technology,digital copyright disputes are becoming increasingly serious.The digital watermarking prevention technique against the copyright infringement needs to be improved urgently.Among the proposed technologies,zero