摘要
近年来,正交频分复用(OFDM)技术已被越来越多的人所关注,并且在IEEE 802.11无线局域网中得到实际应用.在OFDM系统中一般要进行信道估计,本文对常用的四种信道估计插值方法进行了分析,并给出了仿真结果.结果表明,采用离散傅立叶插值所得到的效果最好;采用三阶样条曲线插值次之;采用基于二阶多项式插值的方法比三阶样条曲线插值又要差些;采用线性插值的方法所得到的效果最差.
Recently orthogonal frequency division multiplexing（OFDM） has received more and more attention and has been applied to IEEE 802.11 wireless LAN.We usually apply channel estimation in OFDM system.In this paper,four interpolation methods of channel estimation were analyzed,and its simulation results were present.The results show that Discrete Fourier Transform（DFT） interpolation method obtains the best performance,following DFT interpolation is the three-order spline method,the second order polynomial method performs worse than tri-spline method,and the linear interpolation gets the worst results.
出处
《甘肃联合大学学报（自然科学版）》
2012年第1期47-50,共4页
Journal of Gansu Lianhe University :Natural Sciences
关键词
正交频分复用
信道估计
梳状导频
插值方法
orthogonal frequency division multiplexing（OFDM）
channel estimation
comb pilot
Interpolation method
