太赫兹科学与电子信息学报2017，Vol.15Issue(5)：787-792,6.DOI:10.11805/TKYDA201705.0787
电力无线专网中一种OFDM载波同步算法
OFDM carrier synchronization algorithm in electrical wireless network
摘要
Abstract
Electrical wireless network constructs the 4G wireless TD-LTE network in the 1.8 GHz band, where Orthogonal Frequency Division Multiplexing(OFDM) is one of the key technologies. However, OFDM is sensitive to Carrier Frequency Offset(CFO) which will result in serious degradation of system performance. Therefore, accuracy of the CFO estimation is significant for the OFDM system and is required to ensure the performance. A blind CFO estimation for OFDM systems via local searching Multiple Signal Classification(MUSIC) algorithm is proposed. The algorithm constructs an improved spatial spectral function by combining the orthogonality between the column vectors of the CFO matrix and the noise subspace, and the single peak characteristic of CFO. The CFO estimation is obtained by local peak searching, and the problem of missing peaks under low SNR in traditional MUSIC algorithm can be overcome. Comparing to the traditional CFO estimation approaches, the proposed algorithm can improve CFO estimation performance. The simulation results validate the effectiveness and superiority of the proposed algorithm.关键词
正交频分复用(OFDM)/载波频率偏移(CFO)/多重信号分类(MUSIC)算法/局部搜索Key words
Orthogonal Frequency Division Multiplexing(OFDM)/Carrier Frequency Offset(CFO)/Multiple Signal Classification(MUSIC)/local searching分类
信息技术与安全科学引用本文复制引用
马涛,冯宝,蔡世龙,李洋..电力无线专网中一种OFDM载波同步算法[J].太赫兹科学与电子信息学报,2017,15(5):787-792,6.基金项目
南瑞集团公司信息通信支撑智能电网重大专项:可信通信网云服务资助项目(524606160147) （524606160147）
