Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Shiliang Fang"'
Autor:
Chao Liu, Shiliang Fang
Publikováno v:
Applied Sciences, Vol 14, Iss 11, p 4865 (2024)
Active sonar can usually only directly measure the distance and bearing information of underwater targets, and cannot directly obtain target velocity, acceleration and other information. Therefore, the amount of information is relatively small, makin
Externí odkaz:
https://doaj.org/article/323332aa99ed4f86827a8914f6120727
Publikováno v:
Remote Sensing, Vol 15, Iss 8, p 2121 (2023)
Traditional two-step localization methods and direct localization methods have practical problems when they are used for underwater acoustic source localization. In this paper, a localization method based on the feature-level information fusion is pr
Externí odkaz:
https://doaj.org/article/18bd124f003743a5b84972f828ffb697
Publikováno v:
IEEE Access, Vol 9, Pp 43522-43539 (2021)
In the presence of multiple sources, the performance of direction-of-arrival (DOA) estimation based on beam power maximization is susceptible to the energy leaking from the interference beams to the target beam, especially in the case that the signal
Externí odkaz:
https://doaj.org/article/62e2ed24629b4dababf47cd3f143cd60
Publikováno v:
IEEE Access, Vol 8, Pp 66131-66138 (2020)
This work investigates the detection of non-cooperative underwater acoustic pulse signals at low signal-to-noise ratio (SNR). A variable scale relative entropy (VSRE) pulse signal detection scheme is proposed. Different from conventional relative ent
Externí odkaz:
https://doaj.org/article/2bcbe39abf2449a7a6de710368ef29c1
Publikováno v:
IEEE Access, Vol 8, Pp 159990-160003 (2020)
For detecting the target echoes undergoing distortion in frequency and time dispersive channels, a novel robust active sonar detector is proposed. The proposed active detector firstly extracts the matching envelope (ME) of the multi-pulse linear freq
Externí odkaz:
https://doaj.org/article/469aa0b31ee245bab8ea870b00855ea6
Publikováno v:
Journal of Marine Science and Engineering, Vol 10, Iss 12, p 1922 (2022)
Localization of emitting sources is a fundamental task in sonar applications. One of the most important factors that affect the localization performance is the sensor–target geometry. The sensor formation problem is usually addressed in related wor
Externí odkaz:
https://doaj.org/article/524bbe7300d745728cdd336dcdca2f33
Publikováno v:
IEEE Access, Vol 7, Pp 7920-7931 (2019)
The characterization of wideband underwater acoustic (UWA) multi-path signals is investigated in this paper. The UWA multi-path channel can be considered as a sparse model and it causes changes of the transmitted signal on Doppler factor, time delay,
Externí odkaz:
https://doaj.org/article/6b4178e3c0914b04823ea0527b116338
Publikováno v:
IEEE Access, Vol 7, Pp 117063-117074 (2019)
With respect to the frequency estimation of a real-valued single-tone, a direct frequency estimation method is proposed to acquire fine-resolution parameter by only utilizing three discrete Fourier transform (DFT) samples around the peak. Inspired by
Externí odkaz:
https://doaj.org/article/4ed379a3c9ed4e958f748f278d9f93f2
Publikováno v:
Journal of Marine Science and Engineering, Vol 10, Iss 2, p 250 (2022)
Near-field interference suppression for a towed linear array (TLA) is investigated in this paper. The existing eigencomponent association (ECA) scheme and multiple signal classification interference suppression (MUSIC-IS) scheme require the prior inf
Externí odkaz:
https://doaj.org/article/5b51ab0149494220b5078496f1209398
Publikováno v:
Remote Sensing, Vol 13, Iss 22, p 4586 (2021)
To acquire the enhanced underwater ship-radiated noise signal in the presence of array shape distortion in a passive sonar system, the phase difference of the line-spectrum component in ship-radiated noise is often exploited to estimate the time-dela
Externí odkaz:
https://doaj.org/article/d5e11b81943d49c6a797eddfbc25c015