摘要
针对多带OFDM超宽带(MB-OFDM UWB)系统,依据物理层国际标准ECMA-368,对现有的频偏估计方法做了改进,提出了一种高性能、低复杂度、高鲁棒性的联合载波和采样频偏估计方法。该方法在SC算法基础上,通过选择合适的相关距离,使频偏估计算法适合于所有的跳频模式,同时也改善了估计性能。仿真结果表明,新方法在保证估计性能的基础上可有效降低复杂度,适合于高速MB-OFDM UWB系统。
According to ECMA-368 standard, we improve the existing frequency offset estimation schemes and propose a joint carrier and sampling frequency offset estimation scheme with high performance, low complexity and high robustness for MB-OFDM UWB system. The proposed scheme, on the basis of SC scheme, is suitable for all frequency modes through selecting a proper correlation distance. At the same time, its performance is significantly improved. The simulation results show that the new estimator can efficiently reduce the complexity while guaranteeing the estimation performance, so it is very suitable for high speed MBOFDM UWB.
出处
《电子技术应用》
北大核心
2010年第7期117-121,共5页
Application of Electronic Technique
基金
国家自然科学基金(60830001)
北京交通大学科技基金(2006XZ001)
轨道交通控制与安全国家重点实验室自主课题(RCS2008ZZ007)
