同频无线回传小基站系统中的协作传输优化

发布时间：2018-10-16 16:21

【摘要】：全双工的同频无线回传小基站可应用于阴影衰落严重区域的覆盖。在密集部署场景下,自干扰和小区间干扰严重影响系统传输性能。该文提出了一种基于集中式处理的同频无线回传小基站系统方案,采用空域和时域处理联合实现自干扰抑制和协作传输,并设计了一种基于连续凸近似和半正定松弛的迭代算法,对前向链路和回传链路上的波束成形/预编码及功率分配进行优化,从而降低系统发送功率。针对天线收发可切换的系统提出了一种复合算法,能够对收发天线进行高效选择。仿真结果表明:该方案能够有效抑制自干扰和小区间干扰,减小系统发送功率。
[Abstract]:The full duplex radio return base station can be applied to the coverage of the shadow fading area. In the intensive deployment scenario, self-interference and inter-cell interference seriously affect the transmission performance of the system. In this paper, a scheme based on centralized processing is proposed to realize self-interference suppression and cooperative transmission by using spatial domain and time domain processing in the same frequency wireless return small base station system. An iterative algorithm based on continuous convex approximation and positive semidefinite relaxation is designed to optimize beamforming / precoding and power allocation in forward link and return link so as to reduce transmission power. In this paper, a composite algorithm is proposed for antenna switchable system, which can select the antenna efficiently. Simulation results show that the proposed scheme can effectively suppress self-interference and inter-cell interference and reduce the transmission power of the system.
【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“九七三”重点基础研究项目(2012CB316000) 国家“八六三”高技术项目(2014AA01A703) 国家自然科学基金重点项目(61201192) 国家科技重大专项项目(2015ZX03001023-002) 教育部科学研究重大项目(313005) 清华自主科研项目(2011THZ02-2) 东南大学移动通信国家重点实验室开放研究基金(2012D02)
【分类号】：TN929.5

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