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异构网络中下行链路的干扰抑制研究
王欢, 李莉, 江楠, 王发展
上海师范大学 信息与机电工程学院, 上海 200234
摘要:
针对蜂窝网与无线局域网(WLAN)共存的异构网络干扰问题,提出一种干扰抑制方案:在发送端加设预编码矩阵,最大化期望信号强度,减小干扰信号强度;在接收端加设干扰抑制编码矩阵,抑制蜂窝网络基站对无线局域网内用户设备的干扰及无线接入点(AP)对非期望用户设备的干扰.仿真结果表明:该方案可以抑制异构网络下行链路的干扰问题,提高异构网络用户的传输速率.
关键词:  异构网络  预编码矩阵  干扰抑制矩阵  无线接入点
DOI:10.3969/J.ISSN.1000-5137.2017.01.008
分类号:
基金项目:国家自然科学基金青年科学基金(61503251)
Downlink interference suppression in heterogeneous networks
Wang Huan, Li Li, Jiang Nan, Wang Fazhan
College of Information, Mechanical and Electrical Engineering, Shanghai Normal University, Shanghai 200234, China
Abstract:
In order to deal with the problem of heterogeneous network interference in cellular network and wireless local area network (WLAN),we propose an interference suppression scheme:We design precoding matrix at transmitter,which maximizes the expected signal strength and reduces the interference signal strength;then we design interference suppression coding matrix at receiver,which inhibits both interference from base station (BS) on WLAN user equipment and one from access points (AP) on unexpected user equipment.Simulation results show that the proposed scheme can restrain the interference in downlink of heterogeneous networks,and improve the transmission rate of heterogeneous network users.
Key words:  heterogeneous networks  precoding matrix  interference suppression matrix  wireless access point