摘要
LTE(Long Term Evolution)系统中,作为小区搜索的第一步,符号定时算法需要具备很强的鲁棒性。为了进一步增强现有符号同步算法的抗频偏性能,提出了一种优化的符号同步算法。该算法一方面保持已有分段相关同步算法的优点,同时考虑结合预频偏处理来进行符号定时与粗频偏的联合估计,再将多个相关运算集做叠加处理。理论分析和仿真实验结果表明,在多径信道下,所提算法在完成符号定时和粗频偏估计的同时,大大提高了系统抗频偏性能。
In 3GPP Long Term Evolution （LTE） system, symbol timing algorithm, as the first step of cell search, is required a very strong robustness. An improved symbol synchronization algorithm is proposed for further enhancing the performance of anti-frequency-offset of the existing symbol synchronization algo-rithm. The algorithm keeps the advantages of partial correlation synchronization algorithm, and combines with frequency offset pre-processing to perform timing and coarse frequency offset joint estimation effective-ly, and then accumulates multiple correlation operation sets. Both the theoretical analysis and simulation results show that the proposed algorithm greatly improves the performance of anti-frequency-offset, while completing the timing and coarse frequency offset estimation under the multi-path channel.
出处
《电讯技术》
北大核心
2014年第4期457-462,共6页
Telecommunication Engineering
基金
国家自然科学基金资助项目(61301126)
重庆市基础与前沿研究计划项目(cstc2013jcyjA40041)
重庆邮电大学博士启动基金(A2012-33)
重庆邮电大学青年科学研究项目(A2012-77)
重庆市教育委员会科学与技术项目(KJ130528)~~
关键词
LTE系统
符号定时算法
定时同步
粗频偏估计
LTE system
symbol timing algorithm
timing synchronization
coarse frequency offset estimation
