摘要
在比较OFDM信道的线性、高斯、三次样条、低通滤波、变换域和维纳插值的性能后,针对算法误差较大和计算复杂度的问题,给出2种在首尾子载波均插入导频时变换域的改进方法.仿真结果表明:改进的变换域插值的均方误差有显著减小,与维纳算法的性能接近,但复杂度降低.
After comparing several interpolation algorithms of OFDM wireless channels, including linear, Gaussian, cubic spline, lowpess, transform domain and Wiener, we present two improved approaches of transform domain in consideration of pilots inserted at both the first and the last subcarriers. The approaches aim at not only reducing errors to achieve the best performance of Wiener, but also reducing computation complexity. Simulation results show that the BER and MSE of the former four methods are worse than transform domain and Wiener interpolation. Moreover, the performance of the improved approaches is approximate to Wiener interpolation.
出处
《上海师范大学学报（自然科学版）》
2007年第6期41-46,共6页
Journal of Shanghai Normal University(Natural Sciences)
基金
上海市教委项目(CL200516)
关键词
OFDM
信道估计
变换域插值
OFDM
channel estimation
transform domain interpolation
