对称Alpha稳定分布噪声下单天线干扰消除算法

蜂窝移动通信系统性能受限于码间干扰、同频干扰和脉冲噪声等因素。本文提出一种基于粒子滤波的单天线干扰消除算法。首先，对脉冲噪声采用Alpha稳定分布进行建模，并对该模型进行高斯近似，递推得到多个未知信道参数的联合后验概率。其次，提出基于延迟粒子滤波的同信道传输码元最大后验估计方法。理论推导和仿真实验结果表明本文算法能够消除码间干扰和同频干扰对码元检测的影响，与其他干扰消除算法相比，特别是在强脉冲噪声和未知信道参数情况下，具有一定的优势。 

Single Antenna Interference Cancellation Algorithm in Symmetric Alpha-Stable Distribution Noise Environments

The performance of the cellular mobile communications system is limited to the effect of inter-symbol interference, co-channel interference and impulsive noise. This paper proposes a single antenna interference cancellation algorithm based on particle filtering. Firstly, the impulsive noise is modeled by Alpha stable distribution which could be expressed by Gaussian approximation, and then the joint posterior probability of the unknown channel parameters is recursively derived. Secondly, a delayed particle filtering method is introduced for the maximum a posterior estimates of the co-channel transmitted symbols. Theoretic deduction and numerical simulation results verify that the proposed algorithm could remove the effect of the inter-symbol interference and co-channel interference to the symbol detection. The proposed method outperforms the existing interference cancellation algorithms，especially in the case of existing strong impulsive noise and unknown channel parameters.