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

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 PACS numbers: 43.60.Bf, 43.30.Vh†Corresponding author: Eui Cheol Jeong (jec528@add.re.kr) P. O. Box 18, Jinhae-gu, Changwon, Gyeongnam 51678, Republicof Korea(Tel: 82-55-540-6537, Fax: 82-55-542-3737)