M-ary Cyclic Shift Keying Spread Spectrum Underwater Acoustic Communications Based on Virtual Time-Reversal Mirror [PDF]
Sensors, 2019 Underwater acoustic communications are challenging because channels are complex, and acoustic waves when propagating in the ocean are subjected to a variety of interferences, such as noise, reflections, scattering and so on.
Feng Zhou +5 more
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Accurate Channel Estimation and Adaptive Underwater Acoustic Communications Based on Gaussian Likelihood and Constellation Aggregation [PDF]
Sensors, 2022 Achieving accurate channel estimation and adaptive communications with moving transceivers is challenging due to rapid changes in the underwater acoustic channels.
Liang Wang +5 more
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Generalized spatial modulation for underwater backscatter communication using acoustic metasurfaces [PDF]
Scientific ReportsDesign of a long-range, high data-rate and ultra low power underwater communications system is crucial for a variety of applications. However, this task is challenging because of the underwater channel dynamics, propagation characteristics and power ...
Ashwini H. Raghavendra +2 more
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Vector Approximate Message Passing Based OFDM-IM Detection for Underwater Acoustic Communications [PDF]
Entropy, 2023 Haixin Sun, Mingzhang Zhou
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Acoustic Parametric Signal Generation for Underwater Communication [PDF]
Sensors, 2018 This paper presents a study of different types of parametric signals with application to underwater acoustic communications. In all the signals, the carrier frequency is 200 kHz, which corresponds to the resonance frequency of the transducer under study ...
María Campo-Valera +6 more
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Effects of Water Column Variations on Sound Propagation and Underwater Acoustic Communications [PDF]
Sensors, 2019 Hefeng Dong, Salman Ijaz Siddiqui
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Single Carrier with Frequency Domain Equalization for Synthetic Aperture Underwater Acoustic Communications [PDF]
Sensors, 2017 Han Wang, Wentao Shi, Chengbing He
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Improving Passive Time Reversal Underwater Acoustic Communications Using Subarray Processing [PDF]
Sensors, 2017 Chengbing He +2 more
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Design and simulation of acoustic vortex wave arrays for long-range underwater communication [PDF]
JASA Express Letters, 2023 The formation and propagation of acoustic vortex waves have been of increasing interest for multiple applications, namely, underwater acoustic communications. Several methods have been presented to form these vortices in underwater environments; however,
Mark E. Kelly, Chengzhi Shi
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A Non-Contact Vital Signs Detection in a Multi-Channel 77GHz LFMCW Radar System
IEEE Access, 2021 The technology of vital signs detection has been proven of great use, whereas it is still limited by several challenges. One of the major challenges is the random body movements (RBMs), which significantly degrade the accuracy of the measurement. In this
Qisong Wu +4 more
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