无线体域网物理层传输编码理论综述：低密度奇偶校验码优化设计

宋丹; 许志平; 洪少华; 王琳

doi:10.11999/JEIT221171

无线体域网物理层传输编码理论综述：低密度奇偶校验码优化设计

doi: 10.11999/JEIT221171

宋丹¹,
许志平²,
洪少华¹,
王琳^1, ,

1.
厦门大学信息学院信息与通信工程系厦门 361005
2.
集美大学海洋信息工程学院人工智能系厦门 361021

基金项目: 国家自然科学基金(61671395)，福建省自然科学基金(2020J01003)，福建省中青年教师教育科研项目(JAT220182)

详细信息

作者简介:
宋丹：女，博士生，研究方向为联合信源信道编码

许志平：男，讲师，研究方向为联合信源信道译码

洪少华：男，副教授，研究方向为信息论与编码、非线性信号处理

王琳：男，教授，研究方向为信息论与编码、宽带无线通信

通讯作者:
王琳　wanglin@xmu.edu.cn

中图分类号: TN911.22
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- 被引次数: 0
出版历程
- 收稿日期: 2022-09-08
- 修回日期: 2022-12-08
- 网络出版日期: 2022-12-13
- 刊出日期: 2023-08-21

Survey of Transmission Coding Theory on Physical Layer for Wireless Body Area Network: Optimal Design of Low-Density Parity-Check Code

1.
Department of Information and Communication Engineering, Xiamen University, Xiamen 361005, China
2.
Department of Artificial Intelligence, Jimei University, Xiamen 361021, China

Funds: The National Natural Science Foundation of China (61671395), The Natural Science Foundation of Fujian Province (2020J01003), Fujian Province Young and Middleaged Teacher Education Research Project (JAT220182)

摘要

摘要: 面向无线体域网(WBAN)传输环境，该文主要论述信道编码与联合信源信道编码系统的码字设计。针对物理层的低功耗和高可靠传输需求，从低密度奇偶校验(LDPC)码的优化设计角度展开，主要在信道模型分类、传输系统构建、技术挑战与解决方案、信道适配性编码设计这4个层面进行梳理和总结。最后，对WBAN环境下LDPC码优化设计的未来研究工作进行展望，为构建下一代通信技术提供参考。
- 低密度奇偶校验码 /
- 无线体域网 /
- 物理层 /
- 编码优化
Abstract: In this paper, the code designs based on the channel coding and the joint source channel coding systems are surveyed over the transmission environment of the Wireless Body Area Network (WBAN). For the requirements of low-power consumption and high reliability on the physical layer, the perspective of optimal design based on the Low-Density Parity-Check (LDPC) code is investigated. Four aspects are summarized, including the classification of channel models, the construction of transmission system, the technical challenges and solutions, and the coding design with channel adaptability. Finally, some future works are prospected for optimally designing the LDPC codes over the WBAN environment, which will provide some references to construct the next-generation communication technology.
- Low-Density Parity-Check (LDPC) code /
- Wireless Body Area Network (WBAN) /
- PHYsical (PHY) layer /
- Coding optimization

HTML全文

图 1 WBAN信道模型节点分布及分类

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图 2 面向WBAN信道的PHY层传输系统设计

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图 3 使用NGA方法修正EXIT算法^[9]

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图 4 韦布尔运动信道在4种分布下，优化公用码型与现有DE码型的BER性能比较^[10]

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图 5 体内信道的MDCSK, MQAM和BPSK调制方案比较^[9]

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表 1 信道模型及传输场景分类^[7]

信道模型	场景标记	具体传输场景描述
CM1	S1	植入节点→植入节点
CM2	S2	植入节点→体表节点
CM2	S3	植入节点→体外节点
CM3	S4	体表节点→体表节点(视距传输)
CM3	S5	体表节点→体表节点(非视距传输)
CM4	S6	体表节点→体外节点(视距传输)
CM4	S7	体表节点→体外节点(非视距传输)

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表 2 人体静止状态下体表节点发送信息通过体表信道模型拟合的概率密度函数^[7]

体表节点的位置	概率密度函数分布	体表节点的位置	概率密度函数分布
右侧腕部	正态分布	右侧上臂	对数正态分布
头部	韦布尔分布	右耳	正态分布
肩部	对数正态分布	胸部	对数正态分布
右侧肋骨	对数正态分布	左侧腰部	正态分布
右侧大腿	对数正态分布	右脚踝	对数正态分布

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表 3 人体运动状态下体表节点发送信息通过体表信道模型拟合的概率密度函数^[7]

体表节点位置	慢速行走	上下蹲起	体表节点位置	慢速行走	上下蹲起
右侧腕部	韦布尔分布	韦布尔分布	胸部	对数正态分布	韦布尔分布
右侧上臂	韦布尔分布	韦布尔分布	右侧肋骨	对数正态分布	韦布尔分布
头部	对数正态分布	对数正态分布	左侧腰部	对数正态分布	韦布尔分布
右耳	对数正态分布	韦布尔分布	右侧大腿	对数正态分布	韦布尔分布
肩部	韦布尔分布	韦布尔分布	右脚踝	韦布尔分布	韦布尔分布

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