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- Title
Study on chaotic oscillator‐based algorithm for weak GLONASS signal acquisition.
- Authors
Liu, Yu; Zou, Xing; Niu, Xiaowei; Hu, Zhengquan
- Abstract
Summary: According to the characteristics of the chaotic oscillator in detecting weak signals, an algorithm based on Duffing chaotic oscillator array was proposed for acquisition of weak GLONASS signals. By means of GLONASS intermediate frequency and Duffing chaotic oscillator models, Lyapunov exponent is adopted to judge the critical condition of phase track and decide whether GLONASS signals exist or not by the change of the critical condition, and numeric iteration procedure is used to calculate the exponent. Finally, the performance of algorithm is simulated using GLONASS intermediate frequency data. The results indicate that acquisition algorithm can satisfy the need of object positioning in low signal‐to‐noise ratio environment.
- Subjects
ALGORITHMS; DUFFING equations; DUFFING oscillators; LYAPUNOV exponents; SIGNAL-to-noise ratio
- Publication
International Journal of Circuit Theory & Applications, 2020, Vol 48, Issue 12, p2056
- ISSN
0098-9886
- Publication type
Article
- DOI
10.1002/cta.2901