Article Details

Abstract

Satellite communication faces various types of electromagnetic interference threats, such as pulse interference, single-tone and multi-tone interference, and barrage jamming. A single frequency-hopping technique only improves the anti-jamming capability of the system to a certain extent. To address the vulnerability of satellite communication links to pulse interference, this paper studies frequency-hopping anti-jamming technology for geostationary orbit satellites, and proposes a frequency-hopping anti-jamming waveform design scheme integrating LDPC coding, π/4-DQPSK modulation and block interleaving. This paper establishes a mathematical model of pulse interference and completes anti-jamming performance simulation at a signal-to-noise ratio of 9 dB. The results show that with an LDPC code of length 2 560 and rate 0.3, the system resists pulse interference with a period of 32 ms and a duty cycle of 38.1%, and ensures reliable transmission of voice services. The proposed scheme effectively enhances the anti-jamming capability of satellite communication systems in complex electromagnetic environments and provides a reference for engineering implementation.

Keywords

satellite communication; frequency hopping; anti-jamming

References

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About the authors

Liu Yanlu (1992-), male, Han ethnicity, from Shijiazhuang, Hebei Province, China, engineer, master's student, research direction: research on satellite communication anti-interference technology; Corresponding author: Kou Chenguang (1991-), male, Han nationality, from Shijiazhuang, Hebei Province, senior engineer, master's student, research direction: satellite communication systems.