An new LFM detection algorithm based on ADTR-FrFT for active sonar system

Zhi-chen, Zhang; Wang, Haiyan; Liu, Zhengguo; Shen, Xiaohong; Jiang, Zhe; Hai-xia, Jing

doi:10.1109/icspcc.2017.8242529

Cited by 1 publication

(3 citation statements)

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“…ATR, PTR and ADVTR have been used for target detection in [ 51 , 53 , 54 ]. Here we will refer to above publications to compare the difference between ATR, PTR and ADVTR.…”

Section: The Principle Of Advtrmentioning

confidence: 99%

“…For ADVTR [ 51 ], as shown in Figure 1 c, the dashed line of ATR in Figure 1 a or phase 2 of ATR is done virtually in a computer. To illustrate the “active detection (AD)” and “virtual TR (VTR) ” of the method more clearly, the diagram is expressed as shown in Figure 1 c, which is separated into two parts by the dash line.…”

Section: The Principle Of Advtrmentioning

confidence: 99%

“…There are few references on the ADVTR method: in addition to [ 50 ], the method is also intended for target detection in [ 51 ]. Based on [ 50 , 51 ], we propose in this paper a DOA estimation method based on ADVTR for underwater multiple targets from array signal processing perspective. It can exploit the underwater multipath propagation channel to improve the SNR of the received signal and the accuracy of target DOA estimation, especially at low SNR.…”

Section: Introductionmentioning

confidence: 99%

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DOA Estimation for Underwater Target by Active Detection on Virtual Time Reversal Using a Uniform Linear Array

Hai-xia

Wang

Liu

et al. 2018

Sensors

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Aiming at addressing the problem caused by multipath effects in direction of arrival (DOA) estimation for underwater targets, a method based on the active detection on virtual time reversal (ADVTR) Capon algorithm is proposed. Unlike the conventional passive target estimation method ignoring the multipath effects but only considering the direct wave, the proposed method is closer to the actual situation in that the multipath signal propagation model is fully taken into account; in addition, active detection (AD) and virtual time reversal (VTR) processes are added, which use active detection to estimate channels, and virtual time reversal to realize focusing in a computer after the source-receive array (SRA) receives the reflected signal of the target. The combination of the two methods can greatly improve the energy of SRA and the precision of target direction estimation. With the popular acoustic field simulation tool Bellhop, the model proposed in this paper is verified. Compared with the conventional Capon method without time reversal, the simulation results show that the ADVTR Capon estimation method is far better, in terms of resolution and suppressing the sidelobes. It is suitable for the target DOA estimation under low signal-to-noise ratio (SNR) conditions. Further, we also show the ADVTR Capon estimation method works well in a real tank experiment.

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“…ATR, PTR and ADVTR have been used for target detection in [ 51 , 53 , 54 ]. Here we will refer to above publications to compare the difference between ATR, PTR and ADVTR.…”

Section: The Principle Of Advtrmentioning

confidence: 99%

Section: The Principle Of Advtrmentioning

confidence: 99%