基于用户协作PDMA的星地融合网络性能分析  

Performance Analysis of User-Collaborative PDMA-Based Integrated Satellite-Terrestrial Networks

作　　者：王丽侠 张昆 王大维 王亚东 张海梁 WANG Lixia;ZHANG Kun;WANG Dawei;WANG Yadong;ZHANG Hailiang(School of Intelligence and Information Engineering,Tangshan University,Tangshan 063000,China;Chengdu Jingrong Unity Technology Co.,Ltd.,Chengdu 610041,China;Tangshan Weicheng Technology Co.,Ltd.,Tangshan 063000,China)

机构地区：[1]唐山学院智能与信息工程学院,河北唐山063000 [2]成都菁蓉联创科技有限公司,成都610041 [3]唐山威程科技有限公司,河北唐山063000

出　　处：《唐山学院学报》2024年第3期25-32,共8页Journal of Tangshan University

基　　金：河北省高等学校科学研究项目(青年基金项目)(QN2023180)。

摘　　要：将用户协作PDMA技术引入到星地融合网络下行链路系统的通信中,目的是当卫星向用户发送PDMA叠加信号时,其中最佳信道用户能够作为半双工中继节点解码和转发其他用户的信息,以提高弱用户的通信性能。文章推导出三用户处于不同程度衰落情况下系统的中断概率和遍历容量表达式,并通过仿真验证了理论分析的正确性,而且证实了与传统的正交多址接入及非协作PDMA系统相比,用户协作PDMA方案可以获得更高的中断性能和遍历容量。The user-collaborative PDMA technology is introduced into the communication of the downlink system in integrated satellite-terrestrial networks,whose purpose is to allow the best channel users to act as half-duplex relay nodes to decode and forward information from other users when the satellite sends PDMA superimposed signals to users,in order to improve the communication performance of weak users.This paper deduces the outage probability and ergodic capacity expressions of the system under different fading conditions for three users,verifies the correctness of theoretical analysis through simulation,and confirms that compared with traditional orthogonal multiple access and non-collaborative PDMA systems,the user-collaborative PDMA scheme can achieve higher outage performance and ergodic capacity.

关 键 词：图样分割多址接入 星地融合网络 中断概率 遍历容量 用户协作 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]