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在迅猛发展的移动通信业务中,为了提高频谱利用率可以降低频率复用因子,但却带来了同频干扰。基于此,文中提出一种变步长的同频干扰消除算法。采用变步长滤波器,变步长是指将步长因子随接收信号相关矩阵的特征值的改变而改变。解决了MIC算法难以平衡复杂度与失调之间的问题。文中在具有瑞利衰减和多径效应的信道下对算法进行了性能仿真,仿真结果表明,此算法平衡了算法复杂度和失调,拥有更好的同频干扰消除性能,且性能稳定。
In the rapidly developing mobile communication service, the frequency reuse factor can be reduced to improve the spectrum utilization rate, but the same frequency interference is brought. Based on this, a variable-step co-channel interference cancellation algorithm is proposed in this paper. Using variable step filter, variable step size refers to the step factor changes with the eigenvalue of the received signal correlation matrix. Solve the MIC algorithm is difficult to balance the complexity and imbalance between the problems. The performance of the algorithm is simulated in the channel with Rayleigh attenuation and multipath effects. The simulation results show that this algorithm balances the algorithm complexity and offset, has better co-channel interference cancellation performance, and has stable performance.