Space-Integrated-Ground Information Networks ›› 2022, Vol. 3 ›› Issue (4): 22-30.doi: 10.11959/j.issn.2096-8930.2022040

Special Issue: 卫星互联网用户接入控制

• Special Issue: Satellite Internet User Access Control • Previous Articles     Next Articles

Beamforming Technology of LEO Satellite in Satellite-Terrestrial Integrated Network

Zhiyong LUO1,2, Ning XIN3,4, Shaohui SUN5   

  1. 1 School of Electronics and Communication Engineering, SUN YAT-SEN UNIVERSITY,Guangzhou 518107,China
    2 Pengcheng Labatory, Shenzhen 518055,China
    3 Institute of Telecommunication and Navigation Satellites,CAST,Beijing 100094,China
    4 Innovation Center of Satellite Communication System,CNSA,Beijing 100094,China
    5 Datang Mobile Communication Equipment Co.,Ltd., Beijing 100083,China
  • Revised:2022-10-31 Online:2022-12-20 Published:2022-12-01
  • Supported by:
    National Key Research and Development Program of China(2021YFB2900503);National Key Research and Development Program of China(2021YFB2900401);National Key Research and Development Program of China(2021YFB2900200)

Abstract:

Because of the difference between satellite-ground link and ground propagation loss characteristics, the spectrum effi ciency index of satellite communication system is far lower than that of terrestrial cellular system in the same period.It is of utility to improve spectral effi ciency by realizing effi cient space division multiplexing with multi-beam antennas.The adaptive beamforming and doppler frequency off set compensation scheme in the LEO multi-beam satellite communication scenario was studied.Firstly, a low-complexity hybrid beamforming scheme was designed.Then, aim at the doppler frequency shifts were diff erent between beams due to their pitch angles, a doppler frequency off set pre-compensation scheme for multi-beam systems was proposed.Finally, the eff ectiveness of the algorithm was verifi ed by MATLAB simulation analysis.

Key words: LEO satellite communication, multi-beam antenna, adaptive beamforming, massive MIMO, Doppler shift

CLC Number: 

No Suggested Reading articles found!