토널 신호 간섭에 강인한 데몬 처리 기법 = A DEMON Processing Robust to Interference of Tonals

다국어 초록 (Multilingual Abstract)

Passive sonars employ DEMON(Detection of Envelope Modulation on Noise) processing to extract propeller information from the radiated noise of underwater targets. However, the conventional DEMON processing suffers from the interference of tonal signals because it extracts propeller signals and some types of tonal signals as well. If there are some tonals in the frequency band for DEMON processing, the conventional DEMON processing may additionally extract frequency informations originated from the interaction between different tonals. In this paper, we propose a modified DEMON processing, which can eliminate the interference of the tonals. The proposed algorithm removes tonals in DEMON processing band before demodulation processing, hence results the robustness to the interference of the tonals. Some numerical simulations demonstrate the improved performance of the proposed algorithm against the conventional algorithm.

참고문헌 (Reference)

1 W. A. Struzinski, "The Effect of Improper Normalization on the Performance of an Automated Energy Detector" 78 (78): 936-941, 1985

2 A. D. Waite, "Sonar for Practising Engineering, 3rd Edition" John Wiley & Sons 2002

3 R. O. Nielsen, "Sonar Signal Processing" Artech House 1990

4 A. D. Michael, "Signature Modeling for Acoustic Trainer Synthesis" 12 (12): 143-147, 1987

5 R. J. Urick, "Principles of Underwter Sound, 3rd Edition" McGraw-Hill 1983

6 A. Kummert, "Fuzzy technology implemented in sonar systems" 18 (18): 483-490, 1993

7 S. Badri, "Estimation of Propeller Shaft Rate in Multipath Environment using Nevanlinna-Pick Interpolation" 1-4, 2007

8 L. Sichum, "DEMON Feature Extraction of Acoustic Vector Signal based on 3/2-D Specturm" 2239-2243, 2007

9 R. O. Nielsen, "Cramer-Rao Lower Bounds for Sonar Broad-band Modulation Parameters" 24 (24): 285-290, 1999

10 S. R. Silva, "Advances in Sonar Technology" I-Tech Education and Publishing 2009