数字预失真技术在低轨卫星通信数字相控阵天线中的应用

韩晓梦; 王继康; 杨再新; 李健行; 王安阳

doi:10.11959/j.issn.1000-0801.2025031

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数字预失真技术在低轨卫星通信数字相控阵天线中的应用

应用 | 更新时间：2025-10-27

- 数字预失真技术在低轨卫星通信数字相控阵天线中的应用
- Application of Digital Predistortion Technique to Digital Phased Array Antenna for the Low Earth Orbit Satellite Communication System
- 天地一体化信息网络 2025年6卷第3期页码：92-99
- 作者机构：
  
  1.上海卫星互联网研究院有限公司，上海 202161
  2.上海市卫星互联网重点实验室，上海 202161
  3.卫星互联网全国重点实验室，上海 202161
- 作者简介：
  
  [ "韩晓梦（1987- ），女，上海卫星互联网研究院有限公司中级工程师，主要研究方向为中射频链路数字处理技术、相控阵天线数字处理技术。" ]
  [ "王继康（1979- ），男，博士，上海卫星互联网研究院有限公司高级工程师，主要研究方向为卫星通信物理层技术、相控阵天线技术。" ]
  [ "杨再新（1989- ），男，上海卫星互联网研究院有限公司中级工程师，主要研究方向为中射频链路数字处理技术、相控阵天线数字处理技术。" ]
  [ "李健行（1990- ），男，上海卫星互联网研究院有限公司中级工程师，主要研究方向为中射频链路数字处理技术、相控阵天线数字处理技术。" ]
  [ "王安阳（1996- ），男，上海卫星互联网研究院有限公司中级工程师，主要研究方向为中射频链路数字处理技术、相控阵天线数字处理技术。" ]
- 基金信息：
- DOI：10.11959/j.issn.1000-0801.2025031
  中图分类号： TP393
- 收稿：2025-01-18，
  
  修回：2025-07-09，
  
  纸质出版：2025-09-20
- 稿件说明：
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韩晓梦,王继康,杨再新等.数字预失真技术在低轨卫星通信数字相控阵天线中的应用[J].天地一体化信息网络,2025,06(03):92-99.

HAN Xiaomeng,WANG Jikang,YANG Zaixin,et al.Application of Digital Predistortion Technique to Digital Phased Array Antenna for the Low Earth Orbit Satellite Communication System[J].Space-Integrated-Ground Information Networks,2025,06(03):92-99.
韩晓梦,王继康,杨再新等.数字预失真技术在低轨卫星通信数字相控阵天线中的应用[J].天地一体化信息网络,2025,06(03):92-99. DOI： 10.11959/j.issn.1000-0801.2025031.

HAN Xiaomeng,WANG Jikang,YANG Zaixin,et al.Application of Digital Predistortion Technique to Digital Phased Array Antenna for the Low Earth Orbit Satellite Communication System[J].Space-Integrated-Ground Information Networks,2025,06(03):92-99. DOI： 10.11959/j.issn.1000-0801.2025031.

摘要

低轨卫星通信系统正朝着广覆盖、高性能的方向发展。传统相控阵天线通过功率回退来改善线性指标，该方法影响相控阵天线系统的等效全向辐射功率（equivalent isotropically radiated power，EIRP）指标。因此将数字预失真（digital pre-distortion，DPD）技术引入低轨卫星通信系统成为研究趋势，以解决星载相控阵天线EIRP和发射线性度矛盾的问题。基于性能和复杂度最优的一阶B样条数字预失真非线性模型进行实测，测试结果显示，数字预失真技术可以改善数字相控阵天线系统EIRP和线性要求的矛盾。

Abstract

Low-orbit satellite communication systems are developing towards wide coverage and high performance. Traditional phased array antennas improve system linearity indicators through power backoff

a method that affects the equivalent isotropic radiated power (EIRP) indicator of phased array antenna systems. Therefore

introducing digital pre-distortion (DPD) technology into low-orbit satellites has become a research trend to address the contradiction between the EIRP of spaceborne phased array antennas and transmission linearity. In this paper

field measurements were carried out based on the first-order B-spline digital pre-distortion nonlinear model with optimal performance and complexity. The test results showed that digital pre-distortion technology can alleviate the contradiction between the EIRP and linearity requirements of digital phased array antenna systems.

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references

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