多小区蜂窝网络波束成形优化策略  

Collaborative Beamforming in Multicell Systems

作　　者：王达[1] 张晓宁[1] 依那[1] 项海格[1] 金野[1] 

机构地区：[1]北京大学信息科学技术学院,北京100871

出　　处：《电子与信息学报》2014年第8期1779-1785,共7页Journal of Electronics & Information Technology

基　　金：国家863计划项目(2012AA01A506);国家自然科学基金(61071083);中国博士后科学基金(2013M530477)资助课题

摘　　要：为了克服多小区的邻小区干扰问题,该文在多小区蜂窝网络中,研究了多小区多用户下行协同传输技术。该文提出一种联合优化基站和中继的波束成形权重的迭代算法,在基站和中继总功率限制下最大化最差用户接收信干噪比(Signal-to-Interference-and-Noise Ratio,SINR)。该文提出的联合优化波束成形策略,可以应用半正定松弛技术(Semi-Definite Relaxation,SDR)得到有效的解决。仿真表明,在多小区通信系统中,该文提出的迭代算法只需要少量的迭代次数就可以达到近似最优性能,并且在性能和资源消耗之间给出一种折中的传输策略。For coping with the severe inter-cell intereference in the future cellular systems, this paper studies the collaborative multicell downlink transmission for multiusers in multicell systems. This paper proposes an iterative scheme to optimize jointly relay and the Base Station（BS） beamforming weights to maximize the worst-case Signal-to-Interference-and-Noise Ratio（SINR） under total relay and BS power constraints. The proposed optimization problems for relay and BS beamforming weights can be effectively solved by using the Semi-Definite Relaxation（SDR） technology. The simulation results show that the proposed relay and BS beamforming iterative scheme can achieve near-optimal performance within a few iterations for multiusers in multicell systems.

关 键 词：无线通信 多小区系统 中继传输 波束成形 最大化最差信干噪比 

分 类 号：TN92[电子电信—通信与信息系统]