| 基于带内自回传小基站系统的干扰抑制方案 |
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| 作者姓名： | 张静雷 邱玲 |
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| 作者单位： | 中国科学技术大学中国科学院无线光电通信重点实验室, 合肥 230027 |
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| 基金项目： | 863计划项目（2014AA01A707）资助 |
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| 摘 要： | 基于带内自回传小基站系统，提出一种以用户为中心动态成簇的部分协作干扰抑制方案。根据带内自回传小基站复用接入与回传无线资源的特点，形成以最大化系统下行接入链路吞吐量为目标，联合回传链路资源分配与接入链路预编码设计的优化问题。由于所提问题难以获得最优解，基于凸松弛和分块坐标下降方法，提出一种次优的迭代求解算法。仿真结果表明所提算法能根据回传速率调整协作簇的大小，均衡小基站回传负载，提升系统接入链路的吞吐量。
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| 关 键 词： | 多输入多输出 协同多点传输 稀疏化预编码 带内自回传 小基站 |
| 收稿时间： | 2015-12-22 |
| 修稿时间： | 2016-01-17 |
Interference suppression scheme based on in-band self-backhaul small cell system |
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| Authors: | ZHANG Jinglei QIU Ling |
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| Institution: | Key Laboratory of Wireless-Optical Communications of Chinese Academy of Sciences, University of Science and Technology of China, Hefei 230027, China |
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| Abstract: | In this paper, an interference suppression scheme is proposed for in-band self-backhaul small cell system,and it adopts a user-centric clustering and partial joint processing model to eliminate co-channel interference.Considering the same radio frequency band is shared by access link and backhaul link, we formulate a problem which jointly optimizes the backhaul link resource allocation and the access link beamforming to maximize the access link throughput.However,it is difficult to find the optimal solution to this protlem.Based on convex relaxation and block coordinated decent method, a suboptimal iterative algorithm is proposed.Simulation results show that the proposed algorithm can adaptively change coordination cluster size according to backhaul rate, balance backhaul loading of small cell base station,and significantly improve the system access link throughput. |
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| Keywords: | MIMO CoMP sparse beamforming in-band self-backhaul small cell |
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