Research Article
Frequency Detection of Weak Signal in Narrowband Noise Based on Duffing Oscillator
@INPROCEEDINGS{10.1007/978-3-319-66625-9_47, author={Shuo Shi and Qianyao Ren and Dezhi Li and Xuemai Gu}, title={Frequency Detection of Weak Signal in Narrowband Noise Based on Duffing Oscillator}, proceedings={Communications and Networking. 11th EAI International Conference, ChinaCom 2016, Chongqing, China, September 24-26, 2016, Proceedings, Part I}, proceedings_a={CHINACOM}, year={2017}, month={10}, keywords={Duffing oscillator Narrowband noise Signal frequency detection Initial driving force}, doi={10.1007/978-3-319-66625-9_47} }- Shuo Shi
Qianyao Ren
Dezhi Li
Xuemai Gu
Year: 2017
Frequency Detection of Weak Signal in Narrowband Noise Based on Duffing Oscillator
CHINACOM
Springer
DOI: 10.1007/978-3-319-66625-9_47
Abstract
Duffing oscillator is used to detect weak signal in strong noise because traditional linear methods cannot work correctly in this situation. Normal Duffing oscillator is used under broadband noise because it is immune to broadband noise. But it is not suitable in narrowband noise because zero expectation of noise is damaged in narrowband noise. In this paper, the difference influence to Duffing oscillator between broadband noise and narrowband noise is analyzed and the resistance of Duffing oscillator to narrowband noise is proved. Then a new frequency detection method based on higher initial driving force amplitude and duration of cycle state is developed. Finally, the appropriate initial amplitude needed in this method is confirmed and the method is verified that it can detect frequency in narrowband noise by simulation.