A study on the features of resolution of robust active sonar pulses from the reverberation environment

Eui Cheol Jeong

doi:10.7776/ASK.2016.35.2.158

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2016 Vol.35, Issue 2 Preview Page

A study on the features of resolution of robust active sonar pulses from the reverberation environment 잔향 환경에 강인한 능동 소나 펄스의 분해능 특성 연구

31 March 2016. pp. 158-165

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Abstract

Many researches for improving detection performance in the reverberation environment have been conducted in active sonar systems. Especially the type of active pulse makes an impact on the detection performance in the reverberation environment. Thus, this paper describes the detection performance of PTFM (Pulse Trains of Frequency Modulated waveform), Costas, and Geometric Comb pulses which are known for their outstanding performance against the reverberation. Sea trial data of those pulses was analyzed and it was figured out that the range resolution of PTFM pulse was deteriorated by its sub-pulses. Costas pulse showed performance degradations of the doppler resolution by multipath signals. Geometric Comb pulse showed the best doppler resolution.

Keywords

Active sonar

PTFM

Costas

Geometric comb

Range resolution

Doppler resolution

능동 소나 분야에서 잔향 환경에 강인한 펄스 형태에 대한 연구가 많이 진행되고 있다. 본 연구에서는 잔향환경에 강인하다고 알려진 PTFM(Pulse Trains of Frequency Modulated waveform), Costas, Geometric Comb 신호에 대해 이론적 특성 분석과 해상에서 실험한 데이터를 바탕으로 각 펄스별 ambiguity function 특성 및 분해능 특성을 비교/분석하였다. 분석 결과 PTFM 펄스는 부펄스에 의한 부엽에 의해 거리 분해능이 매우 낮아졌으며 Costas 펄스는 도플러 부엽에 의해 도플러 탐지 성능이 매우 떨어졌다. Geometric Comb 펄스는 CW(Continous Waveform)와 비슷한 분해능 특성을 보였으며 도플러 분해능이 가장 우수함을 확인하였다.

키워드

능동 소나

PTFM

Costas

Geometric comb

거리 분해능

도플러 분해능

References

Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 35
No :2
Pages :158-165
Received Date : 2016-01-07
Revised Date : 2016-01-27
Accepted Date : 2016-02-11
DOI :https://doi.org/10.7776/ASK.2016.35.2.158

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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