哈尔滨工程大学学报2017，Vol.38Issue(7)：1107-1113,7.DOI:10.11990/jheu.201607080
二元正交chirp载波水声通信时变多普勒系数估计
Doppler coefficient estimation for chirp spread spectrum of binary orthogonal keying system
摘要
Abstract
For the inconsistency between wideband Doppler and code-element Doppler caused when underwater vehicles under relative motion carry out acoustic communication, this paper proposes a Doppler estimation and demodulation algorithm for the mobile and robust underwater acoustic communication system based on binary chirp signal.After the initial Doppler was attained by processing synchronous signal based on the fraction order of Fourier transform, the relevance between the neighboring code elements was utilized to process neighboring code elements by sliding match and iteration.Thus, the Doppler coefficient estimate for each chirp carrier was realized.To estimate the Doppler coefficient, the intermediate variable was utilized to demodulate signals.Simulation and sea trial results confirm the validity of the proposed approach.A communication effect with bit error rate less than 10-4 was achieved via a sea experiment with distance of 5 km and relative velocity of 1.5 m/s.关键词
线性调频信号/移动水声通信/分数阶傅立叶变换/多普勒系数估计/滑动匹配/信号处理/时变信号Key words
LFM signal/mobile underwater acoustic communication/fractional Fourier transform/Doppler coefficient estimation/sliding interative matching/signal processing/time vary signal分类
信息技术与安全科学引用本文复制引用
李增祥,刘磊,赵云江,刘凇佐..二元正交chirp载波水声通信时变多普勒系数估计[J].哈尔滨工程大学学报,2017,38(7):1107-1113,7.基金项目
国家自然科学基金项目(61401114,61431004) （61401114,61431004）
黑龙江省自然科学基金项目(F2016010) （F2016010）
上海交通大学海洋工程国家重点实验室基金项目(1414). （1414）
