一种基于可靠判决反馈信号的SC-FDMA信道估计算法  

Channel Estimation Algorithm of SC-FDMA Based on Reliable Decision Feedback Symbols

作　　者：张子杰[1] 彭端[2] 张欣[1] 刘高星[1] 

机构地区：[1]广东工业大学信息工程学院,广东广州510006 [2]广东工业大学实验教学部,广东广州510006

出　　处：《电视技术》2012年第11期96-99,共4页Video Engineering

基　　金：广州市应用基础研究项目(2006J1-C0331);广东工业大学博士基金项目(073016)

摘　　要：针对SC-FDMA系统,提出一种基于LS,LMMSE的判决反馈信道估计算法。该算法通过设置门限BER,在初始信道估计之后得到的判决反馈信号中选取合适可靠的信号作为准导频信号,与原导频一起进行二次信道估计,通过导频数量的增加来提高信道估计的精度。理论分析和仿真结果表明,该算法提高了信道估计的精度,而且提高了通信性能。A decision- feedback channel estimation algorithm based on IS and LMMSE is proposed for SC-FDMA system. The reliable symbols are chosen from the decision feedback symbols as quasi-pilots after initial channel estimation via setting threshold BER. The quasi-pilots are used to estimate the channel again with the original pilots. The accuracy of channel estimation is improved by increasing the number of pilots. Theory analysis and simulation results show that the accuracy of channel estimation and the communication performance are improved.

关 键 词：单载波频分复用 信道估计 判决反馈 准导频 

分 类 号：TN929.5[电子电信—通信与信息系统]