认知次用户系统中分布式天线的位置优化

发布时间：2018-05-19 21:38

本文选题：移动通信 + 认知无线电　；参考：《清华大学学报(自然科学版)》2014年12期

【摘要】：次用户(SU)系统是认知无线电中的核心概念,SU在满足主用户(PU)干扰约束的前提下接入授权频谱,能够显著提高无线频谱的整体使用效率。基于分布式天线的SU系统(DABSS)以其巨大的容量优势,正成为当前的研究热点。DABSS中分布式天线的位置能极大地影响SU系统的容量。为了提高SU系统的容量,该文提出了距离平方功率比(squared distance divided power,SDDP)准则来进行天线位置的设计。特别考虑一种采用圆阵天线配置的DABSS,给出了天线位置的解析表达式。仿真结果表明:该方案与最优的天线放置方案性能接近,能够在满足PU干扰约束的前提下大幅提升SU系统的容量。
[Abstract]:Secondary user (SUU) system is a core concept in cognitive radio, which can access the authorized spectrum under the premise of satisfying the interference constraints of the primary subscriber / PUU, which can significantly improve the overall efficiency of the radio spectrum. The distributed antenna based Su system (DABSS) is becoming a hotspot in the current research. The position of the distributed antenna can greatly affect the capacity of the Su system because of its huge capacity advantage. In order to improve the capacity of Su system, the range-squared distance divided power SDDP criterion is proposed to design the antenna position. In particular, an analytical expression of antenna position is given for DABSS with circular array antenna configuration. The simulation results show that the performance of the proposed scheme is close to that of the optimal antenna placement scheme and the capacity of the Su system can be greatly increased under the premise of satisfying the pu interference constraints.
【作者单位】：清华大学电子工程系微波与数字通信国家重点实验室;
【基金】：国家“八六三”高技术项目(2014AA01A703) 国家自然科学基金资助项目(61201186);国家自然科学基金创新研究群体项目(61021001) 国家重点基础研究发展规划项目(2012CB316000) 国家科技重大专项课题(2013ZX03001008-004) 教育部科学研究重大项目(313005) 东南大学移动通信国家重点实验室开放研究项目(2012D02)
【分类号】：TN820

【共引文献】