电讯技术2017，Vol.57Issue(5)：548-554,7.DOI:10.3969/j.issn.1001-893x.2017.05.010
新型船舶自动识别系统设计及其同步算法分析
Design of a Novel Automatic Identification System and Analysis of Its Synchronization Algorithm
摘要
Abstract
In order to improve the capacity of Automatic Identification System(AIS),a novel AIS design scheme is presented in which Orthogonal Frequency Division Multiplexing(OFDM) is adopted as the signal modulation mode.The design of the novel system includes system parameter design and frame structure design.The novel system makes full use of the spectrum resources and the link capacity and the transmission rate improve 6 times.OFDM system is particularly sensitive to the Symbol Timing Offset(STO) and Carrier Frequency Offset(CFO),so it is necessary to synchronize the received signal.A new blind symbol timing and frequency offset estimation algorithm is proposed which constructs a normalized correlation function between the received signals in multi-path fading channels.The proposed method gets the timing offset and the channel length from the correlation characteristics of the function directly.Consequently,the frequency offset is jointly estimated.The simulation results show that the algorithm has better performance even in multi-path channel.关键词
船舶自动识别系统/正交频分复用/符号定时偏差/载波频率偏差/同步/盲估计Key words
automatic identification system(AIS)/OFDM/symbol timing offset/carrier frequency offset/synchronization/blind estimation分类
信息技术与安全科学引用本文复制引用
马社祥,刘兆杰..新型船舶自动识别系统设计及其同步算法分析[J].电讯技术,2017,57(5):548-554,7.基金项目
国家自然科学基金资助项目(61371108,61601326) （61371108,61601326）
天津市高等学校科技发展基金计划项目(20140706,20140707) （20140706,20140707）
天津市应用基础与前沿技术研究计划(青年基金项目)(5JCQNJC01800) （青年基金项目）
