期刊
IEEE JOURNAL OF OCEANIC ENGINEERING
卷 47, 期 1, 页码 255-267出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JOE.2021.3088909
关键词
Frequency shift keying; Receivers; Time-frequency analysis; Doppler effect; Bandwidth; Transmitters; Sonar equipment; Acoustic signal detection; digital communication; Doppler effect; frequency shift keying; frequency-selective fading channels; line-of-sight propagation; spatial diversity; time-varying channels; underwater communication
This article introduces a novel approach for underwater acoustic communication in challenging channels, utilizing the MC-BFSK waveform to achieve better performance in low data rate applications. The method enhances robustness against Doppler effects and reverberation, and demonstrates the ability to decode frames without a direct path between transmitter and receiver.
This article describes a novel approach for robust and reliable underwater acoustic communication targeting low data rate applications in very challenging channels. The well-known binary frequency shift keying (BFSK) modulation is extended with multiple pair-wise BFSK subcarriers forming a multicarrier (MC) waveform referred to as MC-BFSK. Time offsets between neighboring subcarriers combined with windowing and guard periods are employed to increase the robustness against Doppler-induced frequency spread/shift and reverberation together with novel methods for synchronization, peak-to-average-power ratio reduction, and soft-value extraction. For the design of the parameters of the waveform, a heuristic approach is utilized. A noncoherent matched filter receiver with spatial diversity is adopted. The MC-BFSK transmission scheme is evaluated by means of computer simulations as well as sea-trial measurements. The obtained results are compared with competing modulation schemes where the proposed MC-BFSK shows better performance in challenging channels. In particular, we are able to decode frames in a sea-trial scenario where the direct path between the transmitter and the receiver is blocked by an island.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据