Joint Precoding Optimization of Multibeam Satellite System Based on Partial Channel Information

SONG Gao-jun; CAO Shou-guo

doi:10.3969/j.issn.0372-2112.2015.11.014

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Joint Precoding Optimization of Multibeam Satellite System Based on Partial Channel Information

更新时间：2025-07-16

- Joint Precoding Optimization of Multibeam Satellite System Based on Partial Channel Information
- Acta Electronica Sinica Vol. 43, Issue 11, Pages: 2232-2236(2015)
- 作者机构：
  
  南昌航空大学信息工程学院,江西,南昌,330063
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China (No.61362013);Aerospace Science and Technology Innovation Fund (No.CASC2011102)
- DOI：10.3969/j.issn.0372-2112.2015.11.014
  CLC： TN927
- Published：2015
- 稿件说明：
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SONG Gao-jun, CAO Shou-guo. Joint Precoding Optimization of Multibeam Satellite System Based on Partial Channel Information[J]. Acta Electronica Sinica, 2015, 43(11): 2232-2236.
DOI：

SONG Gao-jun, CAO Shou-guo. Joint Precoding Optimization of Multibeam Satellite System Based on Partial Channel Information[J]. Acta Electronica Sinica, 2015, 43(11): 2232-2236. DOI： 10.3969/j.issn.0372-2112.2015.11.014.

摘要

在现有的卫星多波束联合预编码技术研究中

普遍假设卫星发射机有理想的用户信道信息;遗憾的是

由于长距离信号传播延迟

这种假设并不适合于卫星移动通信系统

特别是地球同步卫星系统.为了解决这个问题

提出了基于部分信道信息的多波束协作传输方法;利用阴影-莱斯信道模型

本文导出了闭合形式的中断容量表示

给出了基于部分信道信息的多波束联合预编码优化算法

克服了现有方法的局限性.仿真结果表明

与传统的单波束频率复用方法比较

提出的方法大大降低了系统的发射功率.

Abstract

Existing work on multibeam joint precoding technique assumes the availability of perfect channel state information(CSI) at the satellite transmitter.Unfortunately

this assumption is not applicable to mobile satellite systems due to the long propagation delays

especially for the geostationary earth orbit(GEO) satellite systems.In order to solve the problem

this paper presents a multibeam cooperative transmission method based on partial CSI.Employing the shadowed-Rice fading channel model

a closed form expression is derived for the outage capacity and the optimal joint precoding algorithms are proposed assuming the availability of only partial CSI.Simulation results have shown substantial performance gain compared with conventional single beam based processing scheme.

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