通信学报2017，Vol.38Issue(3)：144-153,10.DOI:10.11959/j.issn.1000-436x.2017058
基于改进差分能量检测器的移动直扩水声通信研究
Mobile direct-sequence spread-spectrum underwater acoustic communication based on improved differential energy detector
摘要
Abstract
A Doppler estimation method based on the structural features of spread spectrum signal was proposed,which could achieve real-time Doppler estimation for received spread spectrum signals by energy detecting the result of matching correlation calculation of adjacent received spreading symbols.In addition,this method made full use of the spread spectrum processing gain and could do Doppler estimation under low SNR condition.Improved differential energy detector was further proposed,which can effectively deal with the rapid cartier phase fluctuation interference caused by Doppler effect and time-varying multi-path interference by detecting the output energy of two correlators.Simulation verified the robustness of improved differential energy detector algorithm and the Doppler estimation method based on spread spectrum signal.At-sea data shows that improved differential energy detector combined with the proposed Doppler estimation method can achieve low bit error rate communication for direct-sequence spread spectrum underwater acoustic communication with large time-varying Doppler interference when SNR is-10 dB.关键词
扩频通信/移动水声通信/改进差分能量检测器/多普勒估计Key words
spread spectrum communication/mobile underwater acoustic communication/improved differential energy detector/Doppler estimation分类
通用工业技术引用本文复制引用
杜鹏宇,郭龙祥,殷敬伟,乔钢..基于改进差分能量检测器的移动直扩水声通信研究[J].通信学报,2017,38(3):144-153,10.基金项目
国家自然科学基金资助项目(No.61471137,No.51509059) （No.61471137,No.51509059）
霍英东教育基金会青年教师基金资助项目(No.151007)The National Natural Science Foundation of China (No.61471137,No.51509059),Henry Fok Education Foundation for Young Teachers (No.151007) （No.151007）
