Journal on Communications ›› 2021, Vol. 42 ›› Issue (8): 25-32.doi: 10.11959/j.issn.1000-436x.2021158

• Topics: Satellite Communications Technology • Previous Articles     Next Articles

Secrecy analysis for orthogonal time frequency space technique based LEO satellite communication

Zan LI1, Junfan HU1, Bing LI2, Jia SHI1, Jiangbo SI1   

  1. 1 State Key Laboratory of Integrated Services Networks, Xidian University, Xi’an 710071, China
    2 Shaanxi Institute of Electronic Technology, Xi’an 710032, China
  • Revised:2021-06-02 Online:2021-08-25 Published:2021-08-01
  • Supported by:
    The National Science Foundation for Distinguished Young Scholar(61825104);The National Natural Science Foundation of China(61631015);The National Natural Science Foundation of China(61901327);The Fundamental Research Funds for the Central Universities(JB210109)

Abstract:

In order to improve the security performance of low earth orbit (LEO) satellite downlink communication system, a cooperative UAV was employed to send jamming signals against the eavesdroppers.In particular, the downlink transmission was based on the orthogonal time frequency space (OTFS) technique to combat the severe Doppler effect caused by the high mobility of the LEO satellite.The closed form expression for the security outage probability (SOP) was derived at the legitimate receiver, where a novel moment matching approach was used for finding a summed probability distribution function (PDF) of the shadowed-Rician (SR) distributed terms.Simulation results prove that the SOP performance advantage of the downlink LEO satellite communication achieved by OTFS over OFDM scheme, and show the effectiveness of employing unmanned aerial vehicle (UAV) jammer in terms of enhancing secrecy transmission.

Key words: OTFS, LEO satellite communication, physical layer security, UAV cooperation

CLC Number: 

No Suggested Reading articles found!