摘要
在介绍MIMO_OFDM系统模型,分析TD-ERCS映射产生的混沌序列特性基础上,提出了一种基于混沌序列的MIMO_OFDM系统时间和频率同步新算法。该算法利用TD-ERCS混沌序列优良的自、互相关性,实现对各个发射天线时间延迟和频率偏移的精确估计。仿真表明,新算法较传统算法有更好的同步精度和通信的安全性。
After introduction of MIMO_OFDM system mode and analysis of chaotic sequence produced by TD-ERCS map, proposed a new time and frequency synchronization algorithm based on chaotic sequence of MIMO_OFDM system. The algorithm utilized the excellent autocorrelation and cross correlation characters of TD-ERCS chaotic sequence, and fulfilled the precise estimation of the time delays and frequency offset of each sending antenna. The simulation results show that the new algorithm has a better synchronous precision and communication security.
出处
《计算机应用研究》
CSCD
北大核心
2008年第2期376-378,381,共4页
Application Research of Computers
基金
国家自然科学基金资助项目(6067204)
湖南省自然科学基金资助项目(04JJ3077)
