一种鲁棒的单载波频域均衡器  

A robust single carrier frequency domain equalizer

作　　者：周弘[1] 朱宇[1] 

机构地区：[1]复旦大学通信科学与工程系,上海200433

出　　处：《太赫兹科学与电子信息学报》2015年第2期215-219,共5页Journal of Terahertz Science and Electronic Information Technology

基　　金：国家科技重大专项课题资助项目(2011ZX03001-002-01);国家自然科学基金资助项目(61271223)

摘　　要：单载波频域均衡(SC-FDE)技术具有发送信号低峰均功率比的优势,是新一代通信3GPP-LTE/LTE-Advanced上行链路的关键技术之一。针对非理想信道估计,基于信道估计误差的统计模型,提出了一种联合频域均衡和时域判决反馈的鲁棒接收均衡器。以最小化均方误差(MSE)为最优准则,推导了均衡器的系数和均方误差的表达式。仿真结果表明,这种鲁棒的混合均衡器在非理想信道估计下较传统均衡器具有显著的性能提升。Single Carrier-Frequency Domain Equalization(SC-FDE) has been widely considered as an attractive technology for uplink broadband wireless transmissions because of its advantage of low peak-to-average power ratio. Based on a statistical model for channel estimation, the robust SC-FDE design with imperfect channel knowledge at receivers due to channel estimation errors is studied. The optimal equalization coefficients are derived under the criterion of minimizing the Mean Square Error(MSE) conditioned on a given channel estimate. Simulation results show that the robust FDE scheme achieves significant improvement over the conventional non-robust FDE scheme.

关 键 词：单载波频域均衡 判决反馈 非理想信道估计 鲁棒性 

分 类 号：TN911.5[电子电信—通信与信息系统]