认知MIMO系统非正交动态时隙分配能耗优化研究  

Research on energy optimization of non-orthogonal dynamic time-slot assignment in cognitive MIMO systems

作　　者：费恒海 葛文萍[1,2] 陈娟[1,2] 陈紫康 FEI Henghai;GE Wenping;CHEN Juan;CHEN Zikang(School of Computer Science and Technology,Xinjiang University,Urumqi 830046,China;Key Laboratory of Signal Detection and Processing,Xinjiang University,Urumqi 830046,China)

机构地区：[1]新疆大学计算机科学与技术学院,乌鲁木齐830046 [2]新疆大学信号检测与处理重点实验室,乌鲁木齐830046

出　　处：《电子科技大学学报》2025年第2期250-256,共7页Journal of University of Electronic Science and Technology of China

基　　金：新疆维吾尔自治区自然科学基金(2022D01C426)。

摘　　要：认知MIMO系统中同时存在多类用户时,不同类型用户受不同约束条件限制,对时隙会有不同需求。该文旨在解决多类用户并存的认知MIMO系统能耗优化问题,提出基于稀疏码多址接入(sparse code multiple access,SCMA)的非正交时隙分配方法,满足更多类型用户的通信需求。在分配时隙时,提出动态时隙分配算法,通过设计虚拟用户进行时隙分配,保证不同类型用户不会占用同一个时隙。仿真结果和分析表明,系统中多类用户同时存在于eMBB(enhanced mobile broadband)和URLLC(ultra-reliable low latency communications)两种场景中时,基于SCMA的非正交动态时隙分配与传统正交分配方式相比能够降低能耗,与固定时隙的非正交时隙分配相比,动态时隙分配算法降低系统能耗的效果更明显。When multiple types of users coexist in a cognitive Multiple Input Multiple Output(MIMO)system,different types of users are subject to different constraints and have different demands for time-slots.In thispaper,we aim to solve the problem of energy consumption optimization in cognitive MIMO systems with multipletypes of users coexisting and propose a non-orthogonal time-slots allocation method based on Sparse CodeMultiple Access(SCMA)to meet the communication needs of more types of users.When allocating time-slots,adynamic time-slots allocation algorithm is proposed to ensure that different types of users will not occupy the sametime-slots by designing virtual users for time-slots allocation.Simulation results and analyses show that whenmultiple types of users in the system exist in both eMBB(enhanced Mobile Broadband)and URLLC(Ultra-Reliable Low Latency Communications)scenarios at the same time,the non-orthogonal dynamic time-slotsallocation based on SCMA is able to reduce the energy consumption compared to the traditional orthogonalallocation,and dynamic slot allocation algorithm can significantly reduce system energy consumption compared tothat of the non-orthogonal time-slot allocation of fixed time-slots.

关 键 词：认知MIMO 动态时隙分配 能耗优化 SCMA 

分 类 号：TN91[电子电信—通信与信息系统]