An Efficient Node Design for underwater acoustic communication based on OFDM

Proceedings of the 2021 5th International Conference on Electronic Information Technology and Computer Engineering Pub Date : 2021-10-22 DOI:10.1145/3501409.3501505

Mingrui Shu, Wenying Chen, Xiaohua Zhang, Kai Wang, Mingyang Li, Qiang Li

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引用次数: 1

Abstract

Acoustics is the most efficient carrier for long-range information transmission under the water. Recently, the Orthogonal frequency-division multiplexing (OFDM) is used for high-speed underwater acoustic communication because of its high efficiency in using wideband frequency and strong resistance to inter symbol interference (ISI). However, this modulation requires large-scale computation so each node consumes huge amount of power. When the power is insufficiency, the node may collapse. In order to solve this problem, optimized transmission and receiving algorithm are developed on an ARM9-based embedded system, which equipped with an additional DSP (TI C6748). The ping-pong processing and data transmission are realized by using a DMA address list, while the modulation is optimized by using the TI's DSP function library. The optimized transmission and receiving algorithm are implemented in underwater acoustic communication. Different pilots are applied to test the system performance. Low BER is achieved and power consumption is reduced.

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基于OFDM的水声通信高效节点设计

声学是水下远程信息传输最有效的载体。近年来，正交频分复用(OFDM)技术以其利用宽带频率效率高、抗码间干扰能力强等优点被广泛应用于高速水声通信中。然而，这种调制需要大规模的计算，因此每个节点消耗大量的功率。当电源不足时，可能导致节点崩溃。为了解决这一问题，在一个基于arm9的嵌入式系统上开发了优化的发送和接收算法，该系统附加了一个DSP (TI C6748)。乒乓处理和数据传输采用DMA地址表实现，调制采用TI的DSP函数库进行优化。在水声通信中实现了优化的收发算法。采用不同的导频来测试系统的性能。实现了低误码率，降低了功耗。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 2021 5th International Conference on Electronic Information Technology and Computer Engineering

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