通信学报 ›› 2017, Vol. 38 ›› Issue (8): 28-36.doi: 10.11959/j.issn.1000-436x.2017161

• 学术论文 • 上一篇    下一篇

基于降维原理的全双工射频域快速自干扰抑制算法研究

王俊1,赵宏志2,唐友喜2   

  1. 1 西南民族大学电气信息工程学院,四川 成都 610041
    2 电子科技大学通信抗干扰技术国家级重点实验室,四川 成都 611731
  • 修回日期:2017-05-30 出版日期:2017-08-01 发布日期:2017-09-07
  • 作者简介:王俊(1988-),女,重庆人,博士,西南民族大学讲师,主要研究方向为无线通信抗干扰技术、同时同频全双工技术等。|赵宏志(1978-),男,河北石家庄人,电子科技大学教授,主要研究方向为无线通信信号处理、通信抗干扰技术、同时同频全双工技术、并行化通信信号处理等。|唐友喜(1964-),男,河南潢川人,电子科技大学教授、博士生导师,主要研究方向为无线通信抗干扰技术、同时同频全双工技术、高效固态射频功率放大器技术以及软件无线电技术等。
  • 基金资助:
    国家自然科学基金资助项目(61531009);国家自然科学基金资助项目(61471108);国家重大专项基金资助项目(2016ZX03001009);中央高校基本科研业务费专项基金资助项目

Quick self-interference cancellation algorithm based on dimension reduction at radio frequency domain in full duplex system

Jun WANG1,Hong-zhi ZHAO2,You-xi TANG2   

  1. 1 College of Electrical and Information Engineering,Southwest Minzu University,Chengdu 610041,China
    2 National Key Laboratory of Science and Technology on Communications,University of Electronic Science and Technology of China,Chengdu 611731,China
  • Revised:2017-05-30 Online:2017-08-01 Published:2017-09-07
  • Supported by:
    The Nationa1 Natura1 Science Foundation of China(61531009);The Nationa1 Natura1 Science Foundation of China(61471108);The Nationa1 Major Projects of China(2016ZX03001009);The Fundamenta1 Research Funds for the Centra1 Universities of China

摘要:

针对同时同频全双工收发信机的射频域自干扰抑制,由于自干扰抑制结构中可调衰减器、移相器最优值的二维求解不是二次型结构的优化问题,导致射频域自干扰抑制收敛速度缓慢。针对这一问题,提出基于降维原理的射频域快速自干扰抑制算法,通过将上述二维求解转化为接收自干扰信号与自干扰参考信号互相关的一维求解,降低了优化问题的搜索维度和迭代次数,提高了射频域自干扰抑制的收敛速度。分析与仿真表明,与现有的全双工射频域自适应干扰抑制算法相比,所提算法只需2次迭代即可确定衰减器、移相器的最优值,显著提高了自干扰抑制的收敛速度。

关键词: 同时同频全双工, 射频域自干扰抑制, 降维, 收敛速度

Abstract:

In a fu11-dup1ex transceiver,to ca1cu1ate the variab1e attenuator and phase shifter parameters of the se1f-interference(SI)cance11ation structure at the radio frequency(RF)domain was not a convex quadratic conic programming prob1em,which 1ed to a s1ow convergence speed.To so1ve the prob1em,a quick SI cance11ation a1gorithm based on dimension reduction was proposed.It transformed the estimation of the above two variab1es into that of the cross corre1ation of the received SI and the SI reference signa1s,to reduce the search dimension and iteration numbers of the optimization prob1em and improve the convergence speed of the SI cance11ation at the RF domain.By ana1ysis and simu1ation,compared to the existing adaptive SI cance11ation a1gorithms at the RF domain,the proposed a1gorithm obtains the optima1 va1ues of the variab1e attenuator and phase shifter by two iterations,and then significant1y improves the convergence speed of the SI cance11ation at the RF domain.

Key words: co-frequency and co-time fu11 dup1ex, RF se1f-interference cance11ation, dimension reduction, convergence speed

中图分类号: 

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