Joint Bearing and Range Estimation of Multiple Objects from Time-Frequency Analysis

Liu, Jeng-Cheng; Cheng, Yuang-Tung; Hung, H. M. James

doi:10.3390/s18010291

Cited by 6 publications

(5 citation statements)

References 21 publications

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“…(2) We propose an energy-based adaptive windowed method for further extracting the focusing term from the received signal after AVTR. (3) Simulation and experimental results have verified the effectiveness of the proposed method.…”

Section: (1)mentioning

confidence: 68%

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Pulse Ranging Method Based on Active Virtual Time Reversal in Underwater Multi-Path Channel

Zhang

Wang

Yao

2020

JMSE

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Aiming at improving the accuracy of pulse ranging measurement in underwater multi-path environment, this paper proposes a novel pulse ranging algorithm based on active virtual time reversal (AVTR). By using the focusing characteristics of AVTR, the received signal can be focused at the receiving end, which eliminates the negative influence of multiple pseudo-peaks. In order to extract the received signal, we propose an energy-based adaptive windowed method which preserves the signal focus peak while truncates the side peak component. Numerical simulations are provided and outfield experiments are conducted. The results demonstrate the effectiveness of the proposed method comparing with correlation-based method.

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Section: (1)mentioning

confidence: 68%

“…High-precision ranging plays an important role in some information systems, such as sonar, radar, and communication system. Pulse ranging is a popular method to measure the distance between a target and an observed transducer [1][2][3]. This method is widely used for its simple implementation [4,5].…”

Section: Introductionmentioning

confidence: 99%

Pulse Ranging Method Based on Active Virtual Time Reversal in Underwater Multi-Path Channel

Zhang

Wang

Yao

2020

JMSE

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“…In Reference [9], a novel approach using a Hilbert-Huang transform and a uniform linear array of hydrophones was proposed for the joint bearings and range estimation of multiple targets. The proposed method (for target location estimation) had a simple algorithm derived from the transformation of a very complicated nonlinear estimation problem.…”

Section: Of 14mentioning

confidence: 99%

Hydroacoustic System in a Biomimetic Underwater Vehicle to Avoid Collision with Vessels with Low-Speed Propellers in a Controlled Environment

Piskur

Szymak

Jaskólski

et al. 2020

Sensors

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In this paper, a hydroacoustic system designed for a biomimetic underwater vehicle (BUV) is presented. The Biomimetic Underwater Vehicle No. 2 (BUV2) is a next-generation BUV built within the ambit of SABUVIS, a European Defense Agency project (category B). Our main efforts were devoted to designing the system so that it will avoid collisions with vessels with low-speed propellers, e.g., submarines. Verification measurements were taken in a lake using a propeller-driven pontoon with a spectrum similar to that produced by a submarine propulsion system. Here, we describe the hydroacoustic signal used, with careful consideration of the filter and method of estimation for the bearings of the moving obstacle. Two algorithms for passive obstacle detection were used, and the results are discussed herein.

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“…In the long distance and low SNR environments, the correlation peak of the GCC algorithm is often difficult to detect automatically. Peak detection has already developed lots of different methods in the field of signal processing, such as window-threshold techniques [18], wavelet transform [19], Hilbert transform [20], and convolutional neural networks [21,22]. For the peek detection in underwater acoustic ranging, the window length and threshold value should be chosen properly in order to apply to the ocean conditions and the characteristics of the measured signal.…”

Section: Introductionmentioning

confidence: 99%

An Improved Time Delay Measurement Method for the Long-Distance Underwater Environment

Wang

Huang

et al. 2023

Sensors

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With the development of underwater navigation and underwater communication, it remains difficult to obtain time delay measurements after propagating long distance. This paper proposes an improved high-accuracy time delay measuring method for long distance underwater channel propagation. First, by sending an encoded signal, the signal acquisition is carried out at the receiving end. Then, to improve signal to noise ratio (SNR), bandpass filtering is carried out on the receiving end. Next, considering the random changes in the underwater sound propagation channel, a strategy is proposed to select the optimal time window for cross-correlation. Then, new regulations are proposed to calculate the cross-correlation results. To verify the effectiveness of the algorithm, we compared it with other algorithms under low SNR conditions using Bellhop simulation data. Finally, the accurate time delay is obtained. With underwater experiments over different distances, the method proposed by the paper achieves high accuracy. The error is about 10−3 s. The proposed method makes a contribution to underwater navigation and communication.

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Joint Bearing and Range Estimation of Multiple Objects from Time-Frequency Analysis

Cited by 6 publications

References 21 publications

Pulse Ranging Method Based on Active Virtual Time Reversal in Underwater Multi-Path Channel

Pulse Ranging Method Based on Active Virtual Time Reversal in Underwater Multi-Path Channel

Hydroacoustic System in a Biomimetic Underwater Vehicle to Avoid Collision with Vessels with Low-Speed Propellers in a Controlled Environment

An Improved Time Delay Measurement Method for the Long-Distance Underwater Environment

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