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Mathematical Problems in Engineering - Volume 2014 2014, Article ID 945946, 6 pages -

Research ArticleCollege of Automation, Harbin Engineering University, Harbin, Heilongjiang 150001, China

Received 4 August 2014; Accepted 13 October 2014; Published 21 December 2014

Academic Editor: Jingjing Zhou

Copyright © 2014 Lanyong Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Multiple carrier frequency detecting signals are transmitted simultaneously by multiple transmitters in multistatic sonar. The echoes mixed with different carrier frequency in the receiver. The different carrier frequency echoes must be separated from one another before features of echoes are extracted in the receiver. Such a problem can be solved by band-pass and low-pass filters. But the amount of operation by this way is too large for real-time realization. Thus this paper presents the technique of channelized receiver based on multiphase filter and the receiving schemes of echo. The proposed receiver has a smaller amount of operation compared to low-pass filter. At last, the feature extraction technology correlation processing and FDWT are introduced. In order to verify the feasibility of this scheme in multistatic sonar, the extracted features of original echo are contrasted with those of processed echo via simulation. Simulation results show that the proposed receiver provides considerable performance.





Autor: Lanyong Zhang, Yixuan Du, and Bing Li

Fuente: https://www.hindawi.com/



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