星地融合网络中基于速率分割的非正交多播和单播传输波束赋形

doi:10.11959/j.issn.2096-8930.2022045

天地一体化信息网络 ›› 2022, Vol. 3 ›› Issue (4): 75-82.doi: 10.11959/j.issn.2096-8930.2022045

所属专题：面向星地融合的信息传输技术

• 专题：面向星地融合的信息传输技术 • 上一篇下一篇

星地融合网络中基于速率分割的非正交多播和单播传输波束赋形

张本思, 彭德义, 李云

重庆邮电大学通信与信息工程学院，重庆 400065

修回日期:2022-08-26 出版日期:2022-12-20 发布日期:2022-12-01
作者简介:张本思（1995-），男，重庆邮电大学硕士生，主要研究方向为星地协作波束赋形
彭德义（1987-），男，重庆邮电大学博士生，主要研究方向为多波束卫星通信、无线信号处理等
李云（1974-），男，重庆邮电大学教授，博士生导师，主要研究方向为5G/6G移动通信技术、卫星移动通信等
基金资助:
国家自然科学基金资助项目(62071077);国家自然科学基金资助项目(61671096);重庆邮电大学博士生培养项目(BYJS201903)

Beamforming for Non-Orthogonal Multicast and Unicast Transmissions Based on Rate Splitting in Satellite-Terrestrial Integrated Network

Bensi ZHANG, Deyi PENG, Yun LI

School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Revised:2022-08-26 Online:2022-12-20 Published:2022-12-01
Supported by:
The National Natural Science Foundation of China(62071077);The National Natural Science Foundation of China(61671096);Doctoral Program of Chong qing University of Posts and Telecommunications(BYJS201903)

摘要/Abstract

摘要：

考虑星地融合非正交多播和单播传输场景，并构建星地融合网络多组多播和单播下行传输系统模型。为有效提升星地融合网络的频谱效率，提出基于速率分割的非正交传输波束赋形方案，从而建立最大最小公平（MMF）波束赋形设计问题以分别优化基站和卫星的发送波束赋形向量。为解决因变量耦合导致约束非凸的问题，提出一种基于连续凸逼近的算法迭代求解。仿真结果表明，与传统非速率分割方案和层分复用方案相比，所提方案能够显著提升星地融合网络的MMF传输速率。

关键词: 星地融合网络, 速率分割, 波束赋形, 多播和单播

Abstract:

A non-orthogonal multicast and unicast transmission scenarios in the satellite-terrestrial integrated networks (STIN was considered), and a system model of joint multi-group multicast and unicast downlink transmitting was constructed.In order to improved the spectral effi ciency of STIN, a beamforming scheme that non-orthogonal transmission based on rate splitting was proposed, where a max-min fair (MMF) beamforming design problem was established to optimized transmit beamforming vector of base station and satellite respectively.And then, considered non-convex constraint caused by variable coupling in the problem, an iterative algorithm based on successive convex approximation to solved the optimization problem was proposed.Simulation results showed that our proposed scheme could improved eff ectively the MMF transmitting rate of the STIN in contrast with the traditional non-rate splitting and layer division multiplexing schemes.

Key words: satellite-terrestrial integrated network, rate splitting, beamforming, multicast and unicast

中图分类号:

TN927+.2

张本思, 彭德义, 李云. 星地融合网络中基于速率分割的非正交多播和单播传输波束赋形[J]. 天地一体化信息网络, 2022, 3(4): 75-82.

Bensi ZHANG, Deyi PENG, Yun LI. Beamforming for Non-Orthogonal Multicast and Unicast Transmissions Based on Rate Splitting in Satellite-Terrestrial Integrated Network[J]. Space-Integrated-Ground Information Networks, 2022, 3(4): 75-82.

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星地融合网络中基于速率分割的非正交多播和单播传输波束赋形

Beamforming for Non-Orthogonal Multicast and Unicast Transmissions Based on Rate Splitting in Satellite-Terrestrial Integrated Network

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