首页|Underwater Image Transmission Method and Realization Based on Inductively Coupled Mooring Chain
Underwater Image Transmission Method and Realization Based on Inductively Coupled Mooring Chain
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Inductively coupled mooring chain transmission technology plays a crucial role in the long-distance online monitoring of marine hydrographic information.However,the impedance characteristics of the seawater medium pose a limitation on its capability to achieve high-speed real-time transmission of underwater images.In this paper,based on the principle of inductively coupled transmis-sion for marine applications,the selected 1920×1080 pixel images are segmented,packaged,and then transmitted to the sending node using the user datagram protocol(UDP),and the modulation and demodulation of the transmitted images are realized using the orthogo-nal frequency division multiplexing(OFDM)algorithm of least squares(LS)estimation,and eight combinations with different mapping modes and coding rates are tested in the bandwidth of 200-800 kHz and the quality of the transmitted images is evaluated using three criteria:mean squared error(MSE),peak signal to noise ratio(PSNR),and structural similarity index(SSIM).The results indicate that the image transmission quality is optimal when the mapping method is 16-quadrature amplitude modulation(16QAM),the coding rate is 1/2,and the center frequency is 800 kHz.Under these conditions,the maximum transmission rate is 0.84 Mbit s-1,the SSIM crite-rion exceeds 0.91690 dB,and the learned perceptual image patch similarity(LPIPS)is less than 0.06000.This paper provides a solution for the underwater image transmission of inductively coupled mooring chains for marine applications.
oceaninductively coupled mooring chainunderwater imageOFDMdata communication
ZHENG Yu、LIU Yingjie、SONG Rujuan、LI Hongzhi
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School of Life Sciences,Tiangong University,Tianjin 300387,China
National Ocean Technology Center,Tianjin 300112,China
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