面向短包URLLC的自适应稀疏矢量编码  

Adaptive Sparse VectorCoding for Short Packet URLLC

作　　者：陈亚迪 罗亿 张雪婉 CHEN Yadi;LUO Yi;ZHANG Xuewan(Nanyang Normal University Library,Nanyang Normal University,NanYang 473061,China;School of Physics and Electronic Engineering,Nanyang Normal University,NanYang 473061,China)

机构地区：[1]南阳师范学院图书馆,河南南阳473061 [2]南阳师范学院物理与电子工程学院,河南南阳473061

出　　处：《长江信息通信》2024年第11期88-92,共5页Changjiang Information & Communications

基　　金：南阳师范学院博士专项计划项目(No.231401);南阳师范学院青年基金培育项目(No.231378)。

摘　　要：稀疏矢量编码(SVC)是一项极具潜力的面向短包高可靠低时延通信(URL LC)的传输技术。然而,当前的基于排列组合稀疏变换的SVC在编码效率较高时其传输性能并不理想。为了改善这一现状,利用索引比特流的二进制和十进制转换间的固有对应关系,提出了一种自适应稀疏变换的SVC(AD-SVC)传输方案。所提AD-SVC传输方案是通过统计上、下两个索引比特流的十进制大小来选择稀疏变换模型,并结合逢小下转的分段稀疏变换思想进行稀疏矢量构造。所提自适应稀疏变换将把稀疏矢量的长度限定在一定范围内。仿真结果表明,当编码效率的提升在一定范围内,所提自适应稀疏变换可以构造出更短的稀疏矢量,这使得AD-SVC能够获得优于现有SVC的误块率(BLER)性能和传输时延性能。Sparse Vector Coding(SVC)is a promising transmission technology for short packet ultra-reliable and low-latency communications(URLLC).However,the current SVC based on combination sparse transformation does not have ideal transmission performance when encoding efficiency is high.In order to improve this situation,an adaptive sparse transformationbased SVC(AD-SVC)scheme is proposed by utilizing the inherent correspondence between binary and decimal conversions of index bit streams.The proposed AD-SVC scheme selects a sparse transformation model by counting the difference between the current and the next index bit streams,and combines the idea of segmented sparse transformation with construction transfer when a small values of index bit stream appears to construct the sparse vectors.The proposed adaptive sparse transformation limits the length of sparse vectors within a certain range.Simulation results show that when the encoding efficiency is in a constraint improved,the proposed adaptive sparse transformation can construct shorter sparse vectors,which enables AD-SVC to achieve better block error rate(BLER)performance and transmission delay performance than existing SVC schemes.

关 键 词：高可靠低时延通信 短包通信 稀疏矢量编码 稀疏变换 

分 类 号：TN92[电子电信—通信与信息系统]