虚拟多参考输入自适应同址干扰抵消算法  

Adaptive co-site interference cancellation algorithm with multiple virtual references

作　　者：谢跃雷[1] 刘洁[1] 李民政[1] 欧阳缮[1] 廖桂生[2] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004 [2]西安电子科技大学雷达信号处理国家重点实验室,陕西西安710071

出　　处：《通信学报》2015年第4期52-57,共6页Journal on Communications

基　　金：国家自然科学基金资助项目(61362007;61461015);广西自然科学基金资助项目(2013GXNSFFA019004);广西无线宽带通信与信号处理重点实验室主任基金资助项目(12107)~~

摘　　要：针对同一空间内相邻发射机对接收机产生的同址干扰,将接收信号过采样后虚拟出多路参考信号并与两级自适应滤波器相结合,构成了一种虚拟多参考输入自适应同址干扰抵消算法。通过在接收纯干扰信号阶段调整第一阶滤波器的权系数,接收信号中包含有用信号时调整第二阶滤波器的系数,实现消除同址干扰恢复有用信号的功能。仿真结果表明,所提同址干扰抵消算法与传统算法相比,在简化了耦合装置的同时,也具有更好的同址干扰抑制效果。Wireless radio communication is usually deteriorated by co-site interferences produced by collocated transmitters. A two-stage adaptive filter with multiple virtual references that drew from over sampled receiving signal is proposed to can- cel the co-site interferences. Co-site interferences can be cancelled and the desired signal can be recovered by adjusting the weights of the first filter when pure interferences are received and adjusting the weights of the second filter when the desired signal is consisted in received signals. The simulation results show that the proposed adaptive co-site interferences cancella- tion algorithm without the coupling device can achieve better performance than traditional algorithms.

关 键 词：同址干扰 过采样 虚拟多参考信号 自适应滤波 

分 类 号：TN911.4[电子电信—通信与信息系统]