摘要
针对单载波频域均衡(SC-FDE)系统现有信道估计方法频谱利用率低、发端计算复杂及存在峰均比等问题,提出了一种基于叠加独特字(UW)序列的SC-FDE信道估计算法。通过UW序列的周期性叠加,实现了导频信号累积增强,并利用传输模型的循环Toeplitz性,实现了信道状态信息估计。该算法用于信道估计的UW序列功率可以灵活调整,频谱利用率高。仿真结果表明,该算法适用于准静态信道环境。
To solve problems of low spectrum efficiency, high complexity at transmit side and high peak-to-average power ratio （PAPR） of existing channel estimation methods, a unique word （UW） superposing based channel estimation algorithm is proposed for single carrier frequency domain equalization （SC-FDE） system. By designing periodic superimposed UW sequences, the power of pilot can be accumulated and thus augmented, and channel state information can be esti- mated by using the Toeplitz property of the transmission model. The power allotted to the chan- nel estimation UW sequences can be flexibly adjusted, and the system efficiency is relatively high. Simulation results show that the algorithm is well suited for quasi-static channel environ- ment.
出处
《指挥信息系统与技术》
2014年第4期63-66,共4页
Command Information System and Technology
基金
总装"十二五"预研课题资助项目
关键词
信道估计
单载波频域均衡
独特字
channel estimation
single carrier frequency domain equalization （SC-FDE）
uniqueword （UW）
