一种鲁棒的单载波频域均衡器

A robust single carrier frequency domain equalizer

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.