OFDM系统基于导频的联合信道估计与干扰抵消算法  

Joint channel estimation and ICI cancellation algorithm for pilot-assisted OFDM systems

作　　者：蒋琦[1] 赵春明[1] 贾鹏[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《通信学报》2007年第4期128-135,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(60496311)~~

摘　　要：对OFDM(orthogonal frequency-division multiplexing)系统中由于时频双选信道产生的载波间干扰进行了分析,并在此基础上提出了一种新的OFDM导频符号结构及信道估计方法,从而实现了在一个OFDM符号内时域信道估计和干扰抵消。仿真结果表明:提出的信道估计与干扰抵消相结合的联合算法不仅可以给出精度较高的信道信息,而且可以明显提高系统的性能。The inter-carrier interference caused by double-selective channels in OFDM systems was analyzed. An OFDM channel estimation method with new pilot structure was also proposed, based on which the channel estimation in time domain and the ICI cancellation could be done within one OFDM symbol. The simulation results show that the proposed joint channel estimation and ICI cancellation algorithm can provide more accurate channel information, and improve system performance apparently .

关 键 词：载波间干扰 信道估计 时域迭代干扰抵消 

分 类 号：TN911.5[电子电信—通信与信息系统]