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Acta Aeronautica et Astronautica Sinica ›› 2023, Vol. 44 ›› Issue (23): 628906-628906.doi: 10.7527/S1000-6893.2023.28906

• Special Topic: Reusable Launch Vehicle Technology • Previous Articles     Next Articles

Reliable communication technologies of reusable launch vehicles in cooperation with satellite during re-entry

Xiaoping LI, Min YANG(), Bo YAO, Yanming LIU, Lei SHI, Haoyan LIU, Chengguang LI   

  1. School of Aerospace Science and Technology,Xidian University,Xi’an 710126,China
  • Received:2023-04-21 Revised:2023-06-25 Accepted:2023-07-03 Online:2023-12-15 Published:2023-07-21
  • Contact: Min YANG E-mail:merovingia1911@126.com
  • Supported by:
    National Natural Science Foundation of China(62071355)

Abstract:

Reusable rockets have become an inevitable development trend of low-cost rocket application technology in the future. They are typical cross-domain reusable vehicles. When the rocket re-enters the atmosphere at a very high speed, the plasma sheath covering the surface of the rocket will cause the problem of communication interruption. This problem has plagued the aerospace field for decades and has not yet been fully resolved. The establishment and maintenance of a reliable communication link is an important basis for realizing full-time measurability and full-process controllability during the re-entry process of a reusable rocket. The development of the low-orbit satellite system in recent years provides a new idea for the design of the re-entry measurement and control link. The electron density of the plasma sheath on the leeward side of the rocket is low, so that the electromagnetic wave can penetrate the sheath to establish a link between the rocket and satellites, thus solving the black-out problem. However, in the re-entry phase, the composite satellite-rocket communication channel is complex, and various influencing factors are deeply coupled. The composite channel model and adaptive communication methods are elaborated separately. Firstly, the main influencing factors on the communication signal in the composite channel of the re-entry satellite-rocket link are analyzed, and the channel models at different scales are established. Then, according to the characteristics of the channel, an adaptive communication method is designed from the perspectives of channel sensing, coding, detection and modulation system. Finally, the re-entry communication scenario is reproduced in the ground experiment to verify the proposed communication methods. The experimental results show that the proposed communication methods can greatly improve the reliability of communication and provide guarantee for communication of rocket reuse.

Key words: satellite-rocket cooperation, plasma sheath, composite channel model, adaptive communication, blackout reproduction

CLC Number: