一种基于多天线波束成形的全双工自干扰抵消算法

发布时间：2018-05-17 07:35

本文选题：无线通信 + 自干扰抵消　；参考：《电子学报》2017年01期

【摘要】：针对同时同频全双工无线通信系统,当基站采用多根发射天线和多根接收天线进行自干扰抵消时,现有技术多集中于自干扰迫零,缺少对发射机射频噪声抑制的研究.本文在考虑射频噪声抑制的基础上,提出一种收发波束联合成形算法,算法首先以信干噪比最大化为原则,优化接收机天线波束成形向量,给出了算法求解表达式;其次以自干扰最小化为原则,优化发射机天线波束成形向量,给出了算法步骤.仿真结果表明,本文算法在发射机信噪比为30.0d B和60.0d B时,3发3收基站的自干扰抵消值分别为65.5d B和89.8d B,与SVD迫零技术相比,分别有25.5d B和19.8d B的性能改善.
[Abstract]:For the simultaneous frequency full-duplex wireless communication system, when the base station adopts multiple transmit antennas and multiple receiving antennas to cancel the self-interference, the existing techniques mostly focus on self-interference forcing, and lack of research on the RF noise suppression of the transmitter. In this paper, based on the consideration of RF noise suppression, a combined beamforming algorithm is proposed. Firstly, based on the maximization of signal-to-noise ratio, the beamforming vector of receiver antenna is optimized, and the expression of the algorithm is given. Secondly, based on the principle of minimization of self interference, the beamforming vector of transmitter antenna is optimized, and the algorithm steps are given. The simulation results show that when the signal-to-noise ratio of the transmitter is 30.0 dB and 60.0 dB, the self-interference cancellation values of the transmitter are 65.5 dB and 89.8 dB, respectively. Compared with the SVD zero-forcing technique, the performance of the proposed algorithm is improved by 25.5dB and 19.8dB, respectively.
【作者单位】：电子科技大学通信抗干扰技术国家级重点实验室;
【基金】：国家自然科学基金(No.61501093,No.61531009,No.61271164,No.61471108,No.61201266) 国家科技重大专项(No.2014ZX03003001-002) 国家863高技术研究发展计划(No.2014AA01A704,No.2014AA01A706,No.2015AA01A701) 教育部与中移动研究基金(No.MCM20130111)
【分类号】：TN92

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