OFDM系统中一种新的联合信道估计和信号检测算法  

A novel algorithm for joint channel estimation and signal detection in OFDM systems

作　　者：李小文[1] 赵北平[1] 王华华[1] 陶敏[1] 董晓朋[1] 

机构地区：[1]重庆邮电大学重庆市移动通信技术重点实验室,重庆400065

出　　处：《光通信研究》2015年第6期58-60,64,共4页Study on Optical Communications

基　　金：国家科技重大专项资助项目(2011ZX03001-003-01)

摘　　要：提出一种新的基于迭代的联合信道估计和信号检测算法,利用ZF(迫零)算法检测出的信号进行下一个OFDM(正交频分复用)符号的信道估计,充分利用了信道估计值和检测符号之间的互信息量,有效地消除了符号间干扰和载波间干扰,提高了信道估计和符号检测的精确度。仿真结果表明,在不同的信道条件下,该算法的性能比传统信号检测方法有明显的提升。In this paper,a novel algorithm for iterative joint channel estimation and signal detection is proposed.It makes the channel estimation of the next OFDM symbol by using the signals detected by using the ZF algorithm,then effectively eliminates the inter-symbol and inter-carrier interferences by making full use of the mutual information between the channel estimation value and the detection symbols,thus improving the precision of the channel estimation and symbol detection.The simulation results show that under different channel conditions,this algorithm performs remarkably better than the traditional signal detection methods.

关 键 词：正交频分复用 迭代信道估计 联合信号检测 

分 类 号：TN926[电子电信—通信与信息系统]