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
王丽侠 1张昆 2王大维 2王亚东 3张海梁3
作者信息
- 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
- 折叠
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.
Abstract
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 prob-ability 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 sys-tems,the user-collaborative PDMA scheme can achieve higher outage performance and erg-odic 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Key words
Pattern Division Multiple Access(PDMA)/integrated satellite-terrestrial net-work/outage probability/ergodic capacity/user collaboration引用本文复制引用
基金项目
河北省高等学校科研青年基金(QN2023180)
出版年
2024
NETL
NSTL
万方数据