All-Digital Self-Interference Cancellation in Zero-IF Full-Duplex Transceivers  

作　　者：Lu Tian Shuai Wang Zhiheng Cheng Xiangyuan Bu 

机构地区：[1]School of Information Science and Electronics,Beijing Institute of Technology

出　　处：《China Communications》2016年第11期27-34,共8页中国通信（英文版）

基　　金：supported in part by the National Natural Science Foundation of China(No.61601027)

摘　　要：In this paper,a general scheme in digital self-interference cancellation at baseband for zero-IF full-duplex transceivers is presented. We model the self-interference signals specifically with only the nonlinear distortion signals falling in receiving band considered. A joint estimation algorithm is proposed for compensating the time delay and frequency offset taking into account the IQ amplitude and phase imbalances from mixers. The memory effect and nonlinear distortion are adaptively estimated by the de-correlated normalized least mean square(DNLMS) algorithm. Numerical simulation results demonstrate that the proposed self-interference cancellation scheme can efficiently compensate the self-interference and outperform the existing traditional solutions.In this paper,a general scheme in digital self-interference cancellation at baseband for zero-IF full-duplex transceivers is presented. We model the self-interference signals specifically with only the nonlinear distortion signals falling in receiving band considered. A joint estimation algorithm is proposed for compensating the time delay and frequency offset taking into account the IQ amplitude and phase imbalances from mixers. The memory effect and nonlinear distortion are adaptively estimated by the de-correlated normalized least mean square（DNLMS） algorithm. Numerical simulation results demonstrate that the proposed self-interference cancellation scheme can efficiently compensate the self-interference and outperform the existing traditional solutions.

关 键 词：communication systems full-duplex transceivers self-interference cancellation IQ imbalance de-correlated normalized least mean square algorithm 

分 类 号：TN914[电子电信—通信与信息系统]