摘要
提出了一种在正交频分复用(orthogonal frequency division multiplexing,OFDM)系统中,当信道最大时延大于循环嵌缀(cyclic prefix,CP)长度时的预编码器的设计方法。该方法利用信道信息设计预编码器,并考虑到信道变化对预编码器性能的影响。仿真结果表明该预编码器能有效消除载波间干扰(intercarrier interfer-ence,ICI)和符号间干扰(intersymbol interference,ISI),提高了系统的性能。
A new precoder design method is proposed for OFDM system in which the length of cyclic prefix (CP) is smaller than the maximum multipath delay. Channel state information(CSI) is used to design the precoder, and channel variation is also considered. Simulation results show that intercarrier interference(ICI) and intersymbol interference(ISI) can be eliminated effectively, and improved performance can be observed when using this precoder.
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2006年第12期1804-1807,共4页
Systems Engineering and Electronics
基金
国家自然科学基金资助课题(60572124)