Study on chaotic oscillator‐based algorithm for weak GLONASS signal acquisition,International Journal of Circuit Theory and Applications

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Study on chaotic oscillator‐based algorithm for weak GLONASS signal acquisition
International Journal of Circuit Theory and Applications ( IF 1.8 ) Pub Date : 2020-11-04 , DOI: 10.1002/cta.2901
Yu Liu ₁ , Xing Zou ₁ , Xiaowei Niu ₁ , Zhengquan Hu ₁

Affiliation

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.

中文翻译：

基于混沌振荡器的弱GLONASS信号采集算法研究

针对混沌振荡器检测弱信号的特点，提出了一种基于达芬混沌振荡器阵列的弱GLONASS信号采集算法。通过GLONASS中频和Duffing混沌振子模型，采用李雅普诺夫指数判断相位跟踪的临界条件，并通过临界条件的变化判断是否存在GLONASS信号，并采用数值迭代的方法计算出指数。。最后，利用GLONASS中频数据对算法的性能进行了仿真。结果表明，在低信噪比的环境下，采集算法可以满足目标定位的需要。

更新日期：2020-12-04

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