Journal of Projectiles, Rockets, Missiles and Guidance >
INS/GNSS Tight Integration Based on INS-aided FLL
Received date: 2013-05-21
Online published: 2025-05-30
In order to improve GNSS jamming immunity for low-cost guided weapon under complex electromagnetic environment, an INS/ GNSS tight coupling (TC) based on the INS-aided second order FLL was proposed. The Doppler frequency from the output of TC based on EKF and the loop filter of the second order FLL was used to control local carrier and code signal NCO, so the high dynamic performance was improved. A model of INS/GNSS tight integration filter was presented and the implementation of INS-aided tracking was given out. Dynamic simulation test shows that the TC based on INS-aided FLL can track carrier-to-noise 18 dB-Hz GPS L1 C/A signal, and the J/S level is 9 dB higher than that of stand-alone receiver.
Key words： INS/GNSS tight integration; INS-aided FLL; high dynamic tracking; anti-jamming; NCO
LI Chuanjun , PENG Zhongfeng , LI Xingcheng . INS/GNSS Tight Integration Based on INS-aided FLL[J]. Journal of Projectiles, Rockets, Missiles and Guidance, 2014 , 34(2) : 1 -5 . DOI: 10.15892/j.cnki.djzdxb.2014.02.009
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