Entity

Time filter

Source Type

Shanghai, China

Li K.,Wuhan Naval University of Engineering | Li K.,Navy Unit 92985 | Wang J.,Wuhan Naval University of Engineering | Yao Y.,Navy Unit 91287
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2011

Aiming at the shortcomings of laser point to point communication, the assumption of building the communication networks by laser diffusion from sea surface is come up with according to the need of real sea battle. The energy distribution characteristics of scattered field is studied using forward-backward method(FBM) combined with Green spectral acceleration algorithm(SAA). The accurate 2D laser scattering coefficients from sea surface are obtained and the results are verified by experiments. The results showed that the energy scattered from sea surface are concentrated in the forward zone, less in the backward zone, and attenuated fast in the edges of the scattered field. The feasibility of building communication network by laser diffusion from sea surface among vessels is illustrated. And compared with the results of FBM and Kirchhoff algorithm(KA), it can be seen that FBM/SAA is a relatively effective and accurate algorithm. Source


Li K.,Wuhan Naval University of Engineering | Li K.,Navy Unit 92985 | Wang J.,Wuhan Naval University of Engineering | Yao Y.,Navy Unit 91287
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2011

Aiming at the shortcomings of laser point-to-point communication, the assumption of constructing communication networks by laser diffusion from sea surface was come up with, and the characteristics of the scattered field of laser from perfect conductor surface(PCS) was studied. First, the 3D model of incident laser beam was established with 3D scalar tapered wave. Second, the matrix equation was given and discretized with the method of moments. Finally, the 3D bistatic scattering coefficient was obtained with forward-backward method to accurately express the 3D scalar characteristics of laser diffusion from PCS. Source


Li K.,Wuhan Naval University of Engineering | Li K.,Navy Unit 92985 | Wang J.,Wuhan Naval University of Engineering | Yao Y.,Navy Unit 91287
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | Year: 2011

The character of network communication by laser diffusion from sea surface was studied by Kirchhoff approximation. The backscattering coefficient and bistatic scattering coefficient were derived through computation of laser scattering fields from two-dimensional rough sea surface according to stationary phase method and optical geometry approach. And the shadowing effect was modified by shadowing function in the process of computation. The results were validated by experiments, showing the feasibility of network communication by laser diffusion from sea surface. Source


Li K.,Wuhan Naval University of Engineering | Li K.,Navy Unit 92985 | Wang J.,Wuhan Naval University of Engineering | Yao Y.,Navy Unit 91287
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | Year: 2011

Idea of building the communication networks by laser diffusion from sea surface was proposed according to the requirement for real sea battles. The energy distribution characteristics of scattered field were studied using forward-backward iteration combined with green spectral acceleration algorithm. The accurate two dimensional laser bistatic scattering coefficients from sea surface were obtained and the results were verified by experiments. The results show that the energy scattered from the sea surface is concentrated in the forward zone, while the backscattering strength is weak, and which attenuates fast in the edges of the scattered field. The feasibility of building communication network by laser diffusion from sea surface among vessels is illustrated. Source


Li K.,Wuhan Naval University of Engineering | Li K.,Navy Unit 91287 | Wang J.,Wuhan Naval University of Engineering | Yao Y.,Navy Unit 91287
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | Year: 2012

Aiming at the shortcomings of laser point to point communication, the assumption of building the communication networks by laser diffusion from sea surface was put forward in order to enhance the quality of the communication and improve the performance of communication security of internal networks among vessels. To get more accurate results of numerical simulation, the characteristics of scattered field of laser from the perfect conduct surface were studied according to the Maxwell equations combined with the conditions of perfect conduct surface. Firstly, three dimensions model of incident laser beam was established with three dimensions scalar tapered wave. Secondly, the matrix equation was given and discretized with method of moment. Finally, three dimensions bistatic scattering coefficient was obtained with conjugate gradient methods to accurately express three dimensions scalar characteristics of laser diffusion from the perfect conduct surface. It makes contributions for the study about the characteristics of laser diffusion from sea surface. Source

Discover hidden collaborations