OQAM/OFDM中基于干扰消除的插值信道估计

摘要

The interference cancelation method (ICM) can provide a considerable channel estimation performance for OQAM/OFDM systems.In this paper, an interpolation method in ICM channel estimation for OQAM/OFDM Systems was proposed.The method could utilize different interpolation methods, such as linear, polynomial and transform domain interpolation, to construct the interpolation channel estimation model according to the different pilots spacing to improve the channel estimation accuracy and the performance of system.The simulation results showed that the choice of interpolation was determined by the pilots spacing.The intrpolation method should be chosen as the lower complexity one when the pilots spacing was small, and when the pilots spacing was large, the system should use the high accuracy iterpolation methods.%针对OQAM/OFDM系统中基于干扰消除信道估计方法采用直接插值方法时性能较差以及导频开销较大的问题,提出了OQAM/OFDM系统基于干扰消除的插值信道估计方法.该方法利用线性插值、多项式插值以及变换域插值等不同的插值方法构建插值信道估计模型,在不同导频间隔条件下的采用性能不同的插值方法来提升信道估计和系统性能.仿真结果表明,当导频间隔较小时,导频数量多,频谱效率低,但是可以采用复杂度很低的插值方法进行信道估计就可以保证估计精度.当需要提升系统频谱效率时,可以增大导频间隔以减少导频符号开销,此时需要采用估计精度更好的插值方式.