Title :
Detection of line spectrum of the ship shaft-rate electric field based on the improved adaptive line enhancement
Author :
Peng, Hu ; Shen-guang, Gong ; Zhong-hua, Bao
Author_Institution :
Dept. of Weaponry Eng., Naval Univ. of Eng., Wuhan, China
Abstract :
The purpose of this paper is to effectively extract the line spectrum of ship shaft-rate electric signal from ocean environmental electric field. Firstly, the frequency domain characteristic of ocean environmental electric field is analyzed and the received signal corrupted by noise is pretreated by a band-pass filter whose pass band is 1~10Hz. Then, an improved adaptive line enhancement algorithm is introduced, in which coherent accumulative algorithm and output error weights are added. The error is closer to the current time, the weight is bigger. The effectiveness of the algorithm is verified by both the measured data and the simulated data. The verified result shows that the algorithm can detect line spectrum of target signal at the lower SNR situations efficiently compared to the ordinary adaptive line enhancement algorithm.
Keywords :
electric fields; ships; underwater acoustic communication; underwater acoustic propagation; adaptive line enhancement; band-pass filter; line spectrum; ocean environmental electric field; received signal; ship shaft-rate electric field; Electric fields; Electric variables measurement; Marine vehicles; Oceans; Sea measurements; Signal to noise ratio; adaptive line enhancement; line spectrum; pretreat; shaft-rate electric field;
Conference_Titel :
Consumer Electronics, Communications and Networks (CECNet), 2011 International Conference on
Conference_Location :
XianNing
Print_ISBN :
978-1-61284-458-9
DOI :
10.1109/CECNET.2011.5768747