摘要
由于无线电波信号在移动通信信道的传输过程中很容易受到多径和衰落效应的影响,所以就需要采用信道估计技术来跟踪信道响应的变化。在估计出导频子信道的频响后,频域内就需用插值算法做相应的内插运算,才可以得到数据子信道的频域响应。论文介绍了四种插值算法,包括常值插值、线性插值、拉格朗日插值和牛顿插值,并通过matlab仿真发现了几种算法的优缺点。
Because the radio signal is easy to be influenced by the multipath and fading effect of the channel in the process of transmission.So it needs the channel estimation techniques to follow the changes of the channel response.After estimating the frequency response of pilot subchannels,the frequency domain needs interpolation algorithms to estimate the frequency response of date subchannels.This paper introduces four kinds of interpolation algorithms,such as constant,linea,Lagrange and Gauss interpolation and emulates these interpolation algorithms to find their advantages and disadvantages by matlab.
出处
《中国新通信》
2013年第20期69-70,共2页
China New Telecommunications
关键词
OFDM
信道估计
插值算法
OFDM
channel estimation
interpolation algorithms
