面向小型AUV的循环移位组合扩频水声通信方案

Cyclic Shift Keying Combinatory Spread Spectrum Underwater Acoustic Communication Scheme for Miniaturized AUVs

摘要:

小型自主水下航行器因受小型化平台自身载具及其工作受限水域信道复杂特性的约束，其所搭载的通信系统需基于低功耗、低复杂性、小尺寸平台实现高通信性能。针对这一挑战，将循环移位键控技术和组合扩频通信技术结合，设计了循环移位组合扩频通信技术方案。针对航行器运动状态导致的多普勒效应， 设计了预设频偏范围多普勒估计方法和低复杂度重定位多普勒补偿方案。通过多普勒估计与补偿的仿真实验和小型自主水下航行器的水池通信实验测试验证所提的通信方案和多普勒估计与补偿方法的有效性。所提循环移位组合扩频通信方案，在多径信道下基于小尺寸、低资源平台有效提高了水声通信传输速率及稳定性。

Abstract:

The communication system of small autonomous underwater vehicles needs to achieve high communication performance based on low power consumption，low complexity and small size platform due to the constraints of the miniaturized platform itself and the complex characteristics of the channel in the restricted waters. To address this challenge，a cyclic shift keying combinatory spread spectrum communication technology scheme is designed based on the cyclic shift keying technology and the combined spread spectrum communication technology. In order to solve the Doppler effect caused by the motion state of the vehicle，the preset frequency offset range Doppler estimation method and low complexity relocation Doppler compensation scheme are designed. The simulation experiment of Doppler estimation and compensation and the water pool communication experiment of the small autonomous underwater vehicle are conducted to verify the effectiveness of the proposed communication scheme and Doppler estimation and compensation method. The proposed cyclic shift keying combinatory spread spectrum communication scheme can effectively improve the transmission rate and stability of underwater acoustic communication based on small size and low resource platform under multi-path channel.