MB-OFDM-UWB系统基于时域扩展的盲频率跟踪算法

通信学报

MB-OFDM-UWB系统基于时域扩展的盲频率跟踪算法

戈立军1，吴虹2

1. 天津工业大学电子与信息工程学院，天津 300387；2. 南开大学信息技术科学学院，天津 300071

出版日期:2013-04-25 发布日期:2013-04-15
基金资助:
天津市应用基础及前沿技术研究计划基金资助项目（13JCQNJC00900, 09JCZDJC16900）；国家自然科学基金资助项目（60872026）；天津工业大学青年基金资助项目（124030075）

Blind frequency tracking based on time-domain spreading for MB-OFDM-UWB systems

Online:2013-04-25 Published:2013-04-15
Supported by:
The Research Program of Application Foundation and Advanced Technology of Tianjin (13JCQNJC00900, 09JCZDJC16900); The National Natural Science Foundation of China (60872026); The Youth Funds of Tianjin Polytechnic University (124030075)

摘要/Abstract

摘要： 对多频带正交频分复用超宽带系统同步技术进行研究，提出一种基于时域扩展技术（TDS）的盲载波频偏（CFO）跟踪算法。利用数据符号与其时域扩展符号的特殊映射关系，在时域和频域分别推导出残余载波频偏的盲估计公式，并构建相应的时频跟踪环路。仿真结果表明，该盲算法具有比导频辅助法更优的跟踪性能。10dB信噪比下，基于TDS进行时频跟踪的残余CFO均方根误差均达到2×10?4，系统误比特率可达10?6数量级。

Abstract: A blind carrier frequency offset (CFO) tracking algorithm based on time-domain spreading (TDS) was proposed for multiband orthogonal frequency division multiplexing ultra wide band systems. The scheme uses data symbols and the mapped TDS ones to develop time and frequency-domain estimators and tracking loops respectively. Simulation results indicate that the proposed scheme has a better performance in tracking accuracy than pilots-aided ones. Under the SNR of 10dB, the mean square root errors of the residual CFO reach 2×10?4, and the bit error rate of the system is 10?6 of magnitude.

戈立军1，吴虹2. MB-OFDM-UWB系统基于时域扩展的盲频率跟踪算法[J]. 通信学报.