两种自适应串行干扰消除器的比较

Comparison of two adaptive successive interference cancellers

多用户检测中的串行干扰检测器,因其结构简单、计算复杂度低而倍受关注,但由于其自身结构特点,容易引起误差传播。在串行干扰检测器中加入自适应滤波算法,使自适应消除器的权重很好地跟踪信道变化。通过计算机仿真可知,采用递归最小二乘的自适应串行干扰消除器比最小均方自适应串行干扰消除器在抗多址和抗远近效应方面性能要更胜一筹。

duet to its simple construction and easy calculation the successive interference canceller （SIC） is more popular than others. Because its construction causes easily the error spread the adaptive filter algorithm is introduced and the SIC weight can track the time-varying channel environment well. The computer .simulation shows that the RLSSIC is better than the LMS-SIC at the multiple access interference （MAI） and ,lear-far scenarios.