多跳多中继无线网络中的协作波束形成技术  

Cooperative beamforming in multi-hop multi-relay wireless networks

作　　者：陈磊[1,2] 刘琚[1,2] 张国伟[1,2] 

机构地区：[1]山东大学信息科学与工程学院,山东济南250100 [2]东南大学移动通信国家重点实验室,江苏南京210096

出　　处：《通信学报》2011年第6期53-59,共7页Journal on Communications

基　　金：国家自然科学基金资助项目(60872024);教育部科技创新工程重大培育基金资金项目(708059);山东大学自主创新基金资助项目(2010JC007);东南大学移动通信国家重点实验室开放基金资助项目(2010D10);西安电子科技大学综合业务网国家重点实验室开放基金资助项目(ISN12-10)~~

摘　　要：针对多跳多中继无线网络中的协作波束形成技术进行研究。在基于放大转发机制的三跳协作通信系统中,对2个中继节点簇的协作波束形成矢量进行联合设计,以求在目标节点获得最大的接收信噪比。该方法首先将原始优化问题加以推导简化,然后应用半定规划方法求解获得协作波束形成矢量的次优解,并结合对分搜索算法加以改进。仿真结果表明,提出的协作波束形成方法可取得明显优于固定放大增益中继策略的接收信噪比。A cooperative beamforming solution for the multi-hop multi-relay wireless networks was propsed. In such networks was proposed, the communication between source and destination was accomplished by a three-hop channel with aid of two relay clusters under amply-and-forward （AF） protocol. In order to maximize the receive signal-noise ratio at destination, the proposed method first formulated the original optimization problem, then a suboptimal solution could be obtained by semidefinite programming （SDP）. An improved solution was also proposed in combination with bisection search. Finally, the effectiveness of proposed method is verified through computer simulations.

关 键 词：协作通信 中继 协作波束形成 

分 类 号：TN929.5[电子电信—通信与信息系统]