基于容量和发射机预调零的全双工天线位置优化研究

发布时间：2018-04-26 00:22

本文选题：无线通信 + 同时同频全双工　；参考：《电子与信息学报》2016年09期

【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。
[Abstract]:In simultaneous frequency full-duplex system, direct path self-interference cancellation is considered, usually the transmitter antenna presetting zero technique is used, but this method can not only reduce the signal power of the remote receiver, but also form a zero trapping region. The main reason for this problem is that the local receiver antenna is not considered in the near field of the transmitter antenna, but the plane wave model is used to design it. In this paper, the spherical wave model with higher degree of freedom is used to optimize the antenna position of the local receiver under the principle of maximizing the capacity of the zero trapping region, and the optimal position is obtained under the condition that the transmitter is preset zero. The simulation results show that the power attenuation in the zero trapping region can be reduced under the condition of ensuring preset zero, and when the antenna interval is half a wavelength, the optimized method is compared with the plane wave method. With the increase of channel correlation, the system capacity of zero trapping region increases to a certain extent.
【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(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)~~
【分类号】：TN911.4

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