关键词:自适应预编码; 网络预编码; 多输入多输出; 小区间干扰; SJNR
Research of adaptive network precoding based on SJNR for inter-cell interference mitigation
QU Gang, XIE Xian-zhong, WANG Jing-jing, ZHENG Pin-lian
(Institute of Personal Communication/MII Key Laboratory of Computer Network & Communication, Chongqing University of Posts & Telecommunications, Chongqing 400065, China)
Abstract:Focusing on the problem that the co-frequency interference of the downlink channels in multi-cell of MIMO systems, this paper used the adaptive network precoding based on the SJNR to reduce the inter-cell interference. First of all, gave the adaptive precoding design based on the SJNR criteria. In this design, each base station used independent precoding approach to suppress adjacent inter-cell interference. And then in order to decrease the handing complex by the active way, attained the adaptive network precoding respectively in the urban and suburb area environments, obtained two adaptive network precoding based on SJNR respectively. Simulation results show that the inter-cell interference is obviously restrained and the system performance is improved after using the active network precoding basing on the SJNR, while it also reduce complexity of system.......