Systems Engineering and Electronics ›› 2022, Vol. 44 ›› Issue (2): 677-683.doi: 10.12305/j.issn.1001-506X.2022.02.39

• Communications and Networks • Previous Articles     Next Articles

High dynamic carrier tracking technology in frequency hopping systems

Yi LIU*, Xiaoxiong ZHOU, Guangjun CHENG   

  1. Beijing Institute of Remote Sensing Equipment, Beijing 100854, China
  • Received:2021-03-24 Online:2022-02-18 Published:2022-02-24
  • Contact: Yi LIU

Abstract:

In order to establish a stable and reliable communication links between unmanned aerial vehicle or missiles, we need to breakthrough under high dynamic carrier capture and tracking technology. Considering the emergency of frequency hopping communication burst transfer mode, an open loop of maximum likelihood estimation (MLE) and extended Kalman filter is a favorable choice to realize the carrier tracking in high dynamic environment. Through theoretical analysis and simulation, it is proved that the algorithm is overcome the drawback of traditional loop. Simulation results show that the tracking technology can work steadily in the low carrier to noise ratio circumstance, and can quickly realize the carrier tracking at low error rate of carrier tracking frequency in high dynamic environment. For the high dynamic scene with initial speed of 300 m/s, initial acceleration of 15g and jerk of 60g per second, the capture and tracking time of this algorithm is reduced to 1%~20% of the traditional loop algorithm when the low carrier to noise ratio is 35 dB-Hz.

Key words: carrier tracking, maximum likelihood estimation (MLE), high dynamic, extended Kalman filter

CLC Number: 

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