Research of the Method for the Weak Signal Detection Based on the Amplitude Fluctuation Property of the Frequency Spectrum

2011 ◽  
Vol 30 (11) ◽  
pp. 2642-2645 ◽  
Author(s):  
Qi-ming Ma ◽  
Xuan-yin Wang ◽  
Shuan-ping Du
Keyword(s):  
Signal Detection ◽  
Frequency Spectrum ◽  
Amplitude Fluctuation ◽  
Weak Signal ◽  
Weak Signal Detection ◽  
Fluctuation Property

Lateral growth of indium(III) selenide nanoribbons and their optoelectronic performance for weak signal detection

2021 ◽  
Vol 546 ◽  
pp. 149166
Author(s):  
Haibo Gan ◽  
Jidong Liu ◽  
Qiaoyan Hao ◽  
Di Wu ◽  
Peng Li ◽  
...  
Keyword(s):  
Signal Detection ◽  
Weak Signal ◽  
Lateral Growth ◽  
Weak Signal Detection

Weak Signal Detection in Underwater Acoustic Based on Time-Series Characteristic

2011 ◽  
Vol 216 ◽  
pp. 548-552
Author(s):  
Hai Ping Wu ◽  
Shi Jian Zhu ◽  
Jing Jun Lou ◽  
Li Yang Yu
Keyword(s):  
Time Series ◽  
Signal Detection ◽  
Matched Filter ◽  
Doppler Frequency ◽  
High Dimensional ◽  
Filter Method ◽  
Weak Signal ◽  
Weak Signal Detection ◽  
Underwater Acoustic ◽  
Radar Echo

For limitation of the matched filter method in underwater acoustic detection,a method of underwater acoustic weak signal detection based on time series characteristic quantity is proposed．Chaotic waveforms, which have thumbtack type ambiguity function, is selected as the waveform of active sonar in the situation of High Dynamic Doppler Frequency Shift. According to the change of correlation dimension while chaotic radar echo appears in the chaotic background, chaotic radar echo is checked out by the means of simulation in the situation of high dimensional chaotic background and low dimensional chaotic background．The method proves out in high dimensional chaotic background．

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