东南大学学报（自然科学版）2017，Vol.47Issue(2)：215-219,5.DOI:10.3969/j.issn.1001-0505.2017.02.003
MIMO-OFDM移动水声通信系统中多普勒扩展估计方案
Doppler scale estimation scheme for MIMO-OFDM mobile underwater acoustic communication system
摘要
Abstract
To eliminate the Doppler effect in the multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) mobile underwater acoustic communication system,a training sequence structure and the corresponding Doppler scale estimation scheme were proposed.The transmitter inserts two identical training sequences ahead of each signal frame,while the receiver uses several parallel correlators to calculate the autocorrelation of the two received training sequences.Then,the Doppler scale factor can be estimated according to the window length of the correlator with the maximum autocorrelation value.The simulation results show that,compared with the traditional estimation scheme using the linear frequency modulation (LFM) signal as the training sequence,the proposed scheme can estimate the Doppler scale factor more accurately by fully utilizing the diversity gains of the MIMO technique,and the estimation error is less than 2 × 10-3.关键词
水声通信/多输入多输出/正交频分复用/多普勒扩展Key words
underwater acoustic communication/multiple-input multiple-output(MIMO)/orthogonal frequency division multiplexing(OFDM)/Doppler scale分类
信息技术与安全科学引用本文复制引用
张行,宋康,李春国,杨绿溪,方世良..MIMO-OFDM移动水声通信系统中多普勒扩展估计方案[J].东南大学学报（自然科学版）,2017,47(2):215-219,5.基金项目
国家自然科学基金资助项目(61372101,61671144)、东南大学优秀青年教师教学科研资助计划资助项目. （61372101,61671144）
