通信学报2017，Vol.38Issue(7)：11-17,7.DOI:10.11959/j.issn.1000-436x.2017141
循环移位扩频多用户水声通信
Multiuser cyclic shift keying spread spectrum underwater acoustic communication
摘要
Abstract
Aiming at the problem of low data rate and high receiver complexity of existing direct sequence spread spectrum code division multiple access (DS-CDMA), a novel code division multiple access (CDMA) using cyclic shift keying (CSK) signaling, namely CSK-CDMA, was proposed for multiuser underwater acoustic communication. The proposed method used the cyclic correlation characteristic of spread spectrum signals withM-ary modulation to provide a higher data rate than con-ventional. Passive time reversal technology was employed to suppress inter-code interference between users and the co-channel interference. The quasi-orthogonality of spread spectrum code was used to improve the processing gain. Multius-er communications are demonstrated with lake experimental recorded data under the condition of 5.27 km distance and com-plex multipath interference. The data rate is 39 bit/s/user for 6 users with bit error rate around 10?2~10?4.关键词
水声通信/循环移位扩频/多用户通信/被动时间反转Key words
underwater acoustic communication/spread spectrum cyclic shift/multiuser communication/passive time reversal分类
信息技术与安全科学引用本文复制引用
何成兵,荆少晶,花飞,席瑞,张瑞玉,史文涛,张群飞..循环移位扩频多用户水声通信[J].通信学报,2017,38(7):11-17,7.基金项目
国家自然科学基金资助项目(No.61471298, No.61531015) （No.61471298, No.61531015）
中央高校基本科研业务费专项基金资助项目(No.3102016AXXX03) （No.3102016AXXX03）
水声通信与海洋信息技术教育部重点实验室(厦门大学)基金资助项目(No.201503) The National Natural Science Foundation of China (No.61471298, No.61531015), The Fundamental Research Funds for the Central Universities (No.3102016AXXX03), Fund of Key Laboratory of Underwater Acoustic Communication and Marine Information Technology (Xiamen University)(No.201503) （厦门大学）
