基于容量和发射机预调零的全双工天线位置优化研究  

Location Optimization of Antenna Based on the Capacity and Transmit Interference Pre-nulling in Full-duplex

作　　者：吴飞[1] 邵士海[1] 唐友喜[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,成都611731

出　　处：《电子与信息学报》2016年第9期2215-2220,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61471108;U1035002/L05;61001087;61101034;61271164;61301154);国家科技重大专项(2014ZX 03003001-002;2012ZX03003010-003;2011ZX03001-006-01);国家863计划项目(2014AA01A704)~~

摘　　要：同时同频全双工系统中,考虑直射路径自干扰信号抵消,通常采用发射机天线预调零技术,但是该方法不仅会降低远端接收机的信号功率,还会形成零陷区域。产生此问题的主要原因是没有考虑本地接收机天线工作在发射机天线的近场区域,而采用平面波模型进行设计。因此该文采用具有更高自由度的球面波模型,在保证发射机预调零的情况下,以零陷区容量最大化为原则,优化本地接收机天线位置,给出了最优位置的求解方法。仿真结果表明,在保证预调零的情况下,能够减小零陷区域功率衰减值;当发射机天线间隔为半个波长时,与平面波优化方式相比,零陷区系统容量随着信道相关性增加而有一定增加。Considering the lithe-of-sight path interference cancellation in Co-time and Co-frequency Full-Duplex （CCFD）, the pre-nulling technique of transceiver is usually used. However, this method forms a subsidence zone of signal power for the remote receiver. The main reason is that the local receiver antenna is not considered in the near field of the transmitter antenna, and the design is based on the plane wave model. In this paper, the spherical wave assumption is adopted, and the local receiver antenna position is optimized by the subsidence capacity maximum while guaranteeing transmitter pre-nulling of self-interference. The procedure of calculating the optimal local receive antenna position is also given. The simulation results show that when the transmitter spacing is half wavelength, the subsidence capacity is improved with the increase of the channel correlation compared with the antennas placement optimization by the plane wave assumption.

关 键 词：无线通信 同时同频全双工 自干扰抵消 容量 预调零 天线位置优化 

分 类 号：TN92[电子电信—通信与信息系统]