一种符号重叠PCC-OFDM盲时偏估计算法Blind Estimation of Time Offset for PCC-OFDM with Overlapping Symbol Periods
唐恬,马楠,张平
摘要(Abstract)：
针对符号重叠PCC OFDM系统,提出了一种盲时偏估计算法。利用并行干扰删除方法消除系统固有的严重的符号间干扰,利用解调信号方差进行判决,获得精确的时偏估计。该算法不需要训练序列、导频信号或周期前缀。在高斯白噪声和Ricean信道下对算法进行了链路仿真,仿真结果证明,该算法能够有效地实现符号重叠PCC OFDM盲时偏估计。
关键词(KeyWords)： 多项式相消编码OFDM;符号重叠;盲估计;时偏
基金项目(Foundation): 国家自然科学基金项目(60496312)
作者(Author): 唐恬,马楠,张平
参考文献(References)：
- [1]Armstrong J.Analysis of New and Existing Methods of Re-ducing Inter carrier Interference due to Carrier FrequencyOffset in OFDM[J].IEEE Transactions on Communica-tions,1999,47(3):365 369.
- [2]Armstrong J,Grant P M,Povey G.Polynomial CancellationCoding of OFDM to Reduce Intercarrier Interference due toDoppler Spread[J].IEEE Globecom,1998,5(8):2 7712 776.
- [3]Shentu J,Armstrong J.Blind Estimation of Time and Fre-quency Offset for PCC OFDM[A].IEEE VTC′2001:[C].Rhodes:Greece,2001:702 706.
- [4]徐志江,李式巨,宫军.一种新的PCC OFDM定时时偏盲估计[J].电路与系统学报,2003,8(4):37 41.
- [5]Poller T,Spruyt P,Moeneclaey M.The BER Performance ofOFDM Systems Using Non synchronized Sampling[A].IEEE Globecom[C].San Francisco:CA,1994:253 257.