同时同频全双工数字快速自干扰抵消算法  

Digital Self-interference Cancellation Algorithm of Co-time Co-frequency Full Duplex

作　　者：芮正雄 赵彦龙 陈旭 胡阳 RUI Zheng-xiong;ZHAO Yan-long;CHEN Xu;HU Yang(Shanghai Radio Equipment,Research Institute,Shanghai 201109,China;First Military Representative Office of Air Force Equipment Department in Shanghai,Shanghai 201109,China)

机构地区：[1]上海无线电设备研究所,上海201109 [2]空军装备部驻上海地区第一军事代表室,上海201109

出　　处：《制导与引信》2020年第4期22-26,共5页Guidance & Fuze

摘　　要：针对同时同频全双工数字自干扰抵消算法迭代次数多、重建自干扰信号所需时间长、自干扰抵消能力不佳的问题,将快速横向递归最小二乘算法用于自适应干扰抵消。该算法根据信道环境的变化,实时调整重建滤波器的抽头系数,得到最优化的自干扰重建信号,用于同时同频全双工系统自干扰抵消。仿真结果表明:在相同干信比条件下,快速横向递归最小二乘算法的自干扰抵消能力和误码率均优于递归最小二乘算法和最小均方算法,且收敛速度最快,收敛后性能最稳定。Aiming at the problem that digital self-interference cancellation algorithm has many iterations,takes long time to reconstruct the self-interference signals,and has poor self-interference cancellation ability,fast transversal recursive least squares(FTRLS)algorithm is applied to adaptive interference cancellation of co-time co-frequency full duplex.According to the change of channel environment,the tap coefficient of the reconstruction filter is adjusted in real time to obtain the optimized self-interference reconstruction signal,which can be used for self-interference cancellation of the co-time co-frequency full duplex system.The simulation results show that FTRLS algorithm has better self-interference cancellation ability and lower bit error rate than recursive least squares(RLS)and least mean squares(LMS)algorithm under the condition of same interference to signal ratio.FTRLS algorithm has the fastest convergence speed and the most stable performance after convergence.

关 键 词：同时同频全双工 快速横向递归最小二乘算法 自干扰抵消 

分 类 号：TN92[电子电信—通信与信息系统]