中国科学院大学学报2025，Vol.42Issue(4)：519-527,9.DOI:10.7523/j.ucas.2023.042
面向低轨卫星多波束间的数字预失真技术
Digital pre-distortion techniques for multibeam interactions on LEO satellites
摘要
Abstract
The convergence of broadband LEO satellite communication systems with 5G is the development trend of satellite communication.To meet the demand for high-speed data transmission,multibeam technology based on large-scale digital phased arrays is indispensable.The peak-to-average ratio problem of multibeam signals induces the non-linear distortion of onboard power amplifiers,while the non-linear distortion of power amplifiers leads to serious interference between multibeams.A digital pre-distortion structure for multibeam is proposed for low-orbit satellite communication systems using large-scale phased arrays.A pre-distortion model is developed to solve the problems of non-linearity,intermodulation distortion and multibeam interference.Through simulation experiments,it is found that the proposed structure is more advantageous than the traditional pre-distortion structure in terms of performance and complexity balance,providing a feasible solution for the implementation of multibeam and overcoming non-linearity on board.关键词
数字预失真/多波束/低轨卫星/功率放大器Key words
digital pre-distortion/multibeam/LEO satellites/power amplifiers分类
信息技术与安全科学引用本文复制引用
黄晨光,王海旺,邵丰伟,李国通..面向低轨卫星多波束间的数字预失真技术[J].中国科学院大学学报,2025,42(4):519-527,9.基金项目
国家高层次人才特殊支持计划(WRJH19DH01)资助 （WRJH19DH01）
