基于循环平稳性的异构网OFDM系统窄带干扰消除
doi: 10.3724/SP.J.1146.2012.00144
Cyclostationarity-based Narrowband Interference Suppression for OFDM Systems in Heterogeneous Networks
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摘要: 在异构网正交频分复用系统中，异系统窄带干扰会造成系统性能的下降。该文提出一种基于信号循环平稳性的异系统窄带干扰消除算法，对干扰进行估计和消除，推导了干扰消除的信干噪比增益。仿真结果表明，与传统的线性预测滤波算法相比，该文提出的方法可以更为准确地估计窄带干扰信号，消除异系统干扰，提高系统性能。Abstract: Narrowband interference from other systems degrades greatly the performance of Orthogonal Frequency Division Multiplexing (OFDM) systems in heterogeneous networks. This paper proposes a cyclostationarity-based narrowband interference suppression algorithm to estimate and suppress the interference, and derives the Signal to Interference plus Noise Ratio (SINR) gain. Simulation results show that the proposed algorithm outperforms the conventional linear prediction filtering method in estimating and suppressing interference, therefore improves the system performance.
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