基于子帧组合扩频和压缩感知的大规模免授权多址接入方案

doi:10.12305/j.issn.1001-506X.2025.11.32

系统工程与电子技术 ›› 2025, Vol. 47 ›› Issue (11): 3851-3858.doi: 10.12305/j.issn.1001-506X.2025.11.32

• 通信与网络 • 上一篇

基于子帧组合扩频和压缩感知的大规模免授权多址接入方案

张晶¹^,²^,*(), 谌翔¹^,²(), 吴烁雨³(), 俞龙鸣³()

1. 南京邮电大学通信与信息工程学院，江苏南京 210003
2. 江苏省无线通信与物联网重点实验室，江苏南京 210003
3. 南京邮电大学波特兰学院，江苏南京 210023

收稿日期:2025-04-16 出版日期:2025-11-25 发布日期:2025-12-08
通讯作者: 张晶 E-mail:jingzhang@njupt.edu.cn;1185734710@qq.com;1273643172@qq.com;3412539823@qq.com
作者简介:谌　翔（1999— ），男，硕士研究生，主要研究方向为6G移动通信、大规模多址接入
吴烁雨（2001— ），女，硕士研究生，主要研究方向为6G移动通信、认知无线电、大规模多址接入
俞龙鸣（2001— ），男，硕士研究生，主要研究方向为6G移动通信、大规模多址接入
基金资助:
国家自然科学基金（92067201）资助课题

Subframe-combined spread spectrum and compressed sensing based massive grant-free multiple access scheme

Jing ZHANG¹^,²^,*(), Xiang CHEN¹^,²(), Shuoyu WU³(), Longming YU³()

1. School of Communication and Information Engineering，Nanjing University of Posts and Telecommunications，Nanjing 210003，China
2. Jiangsu Province Key Lab of Wireless Communications and Internet of Things，Nanjing 210003，China
3. School of Portland，Nanjing University of Posts and Telecommunications，Nanjing 210023，China

Received:2025-04-16 Online:2025-11-25 Published:2025-12-08
Contact: Jing ZHANG E-mail:jingzhang@njupt.edu.cn;1185734710@qq.com;1273643172@qq.com;3412539823@qq.com

摘要/Abstract

摘要：

针对大规模机器类型通信稀疏突发场景下的终端接入问题，提出一种基于子帧组合扩频和压缩感知的大规模免授权多址接入方案。首先，设计了子帧组合扩频上行传输模式，支持用户在多个子帧上以不同的扩频序列传输业务数据，由此强化用户特征以降低多址干扰；然后，设计了基于循环移位的子帧扩频码本生成方法，建立了上行多址传输模型和多用户信号压缩感知模型。最后，提出子帧组合扩频辅助的同步子空间追踪算法，完成活跃用户检测和多用户信号重构。仿真结果表明，相较传统方法，该方案在高信噪比条件下多用户检测误比特率降低近一个数量级,在误比特率为0.1的条件下过载率提升了约3倍，展现出良好的随机多址性能。

关键词: 大规模机器类型通信, 免授权非正交多址接入, 子帧组合扩频, 压缩感知多用户检测

Abstract:

Aiming at the terminal access problem for massive machine-type communication in sparse burst scenarios, a subframe-combined spread spectrum and compressed sensing based massive grant-free multiple access scheme is proposed. First, a subframe-combined spread spectrum uplink transmission mode is designed, which supports users to transmit service data on multiple subframes with different spread spectrum sequences, thereby enhancing user characteristics to reduce multiple access interference. Subsequently, a method for generating subframe spreading codebooks based on cyclic shift is designed, and an uplink multiple access transmission model and a multi-user signal compressive sensing model are established. Finally, a subframe-combined spread spectrum assisted simultaneous subspace pursuit algorithm is put up to detect active users and reconstruct multi-user signal. Simulation results show that, compared to traditional methods, the proposed scheme reduces the bit error rate of multi-user detection by nearly an order of magnitude under high signal to noise ratio conditions, and the overload rate increases by about three times under the condition of bit error rate being 0.1, which demonstrate excellent random multiple access performance.

Key words: massive machine type communication, grant-free non-orthogonal multiple access, subframe-combined spread spectrum, compressed sensing based multi-user detection

中图分类号:

TN 929.5

张晶, 谌翔, 吴烁雨, 俞龙鸣. 基于子帧组合扩频和压缩感知的大规模免授权多址接入方案[J]. 系统工程与电子技术, 2025, 47(11): 3851-3858.

Jing ZHANG, Xiang CHEN, Shuoyu WU, Longming YU. Subframe-combined spread spectrum and compressed sensing based massive grant-free multiple access scheme[J]. Systems Engineering and Electronics, 2025, 47(11): 3851-3858.

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算法名	计算复杂度
SCS-SSP	iter·O（2K_a³G+4K_a²NG+3K_aNJ+KNJ）
SSP	iter·O（2K_a³+4K_a²N+3K_aNJ+KNJ）
SP	iter·O（2K_a³J+4K_a²NJ+3K_aNJ+KNJ）
SOMP	K_a·O（s³+2s²N+2sNJ+KNJ）
OMP	K_a·O（s³J+2s²NJ+2sNJ+KNJ）

参数名称	参数值
扩频因子N	100
总用户数K /个	1500
活跃用户数目K_a /个	60
SNR/dB	10
数据帧时隙数J	6
子帧数目G	2，3，6
调制方式	正交相移键控

基于子帧组合扩频和压缩感知的大规模免授权多址接入方案

Subframe-combined spread spectrum and compressed sensing based massive grant-free multiple access scheme

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