干扰对齐通信网络和新接入用户的共存性研究  

Research on New User Coexistence with Interference Alignment Network

作　　者：岳光荣[1] 李卿[1] 

机构地区：[1]电子科技大学通信抗干扰技术国家级重点实验室,成都611731

出　　处：《电子与信息学报》2013年第6期1311-1317,共7页Journal of Electronics & Information Technology

基　　金：国家科技重大专项(2011ZX03004-002;2011ZX03004-001);国家自然科学基金(60902025);中央高校基本科研业务费(ZYGX2010X003)资助课题

摘　　要：由于频谱资源的短缺,未来的无线通信网络需要同时与其他无线通信网络共同使用相同频谱。近年来出现的干扰对齐技术有效地解决了同一个干扰网络中不同用户的共存性问题。在已经实施干扰对齐的多天线干扰网络中,为了使新的干扰网络既使用相同的频谱资源又不能影响其他原已对齐的干扰网络,该文提出一种不同网络之间干扰对齐的迭代算法。该算法以消除新网络中的干扰为目标进行优化,使所有用户都能同时进行无干扰的通信。仿真结果表明,当新网络中的发射节点和接收节点都配置充足的天线时,新网络中的用户就可以达到干扰对齐,从而不仅可以进行无干扰的通信,也不会影响旧网络中的用户。无论是新网络中的发射节点的天线不足还是接收节点的天线不足,都会对新网络中的不同用户的无干扰通信产生影响,并且发射节点天线不足带来的影响更大。Future wireless network must consider the problem that utilizing the same frequency band with other wireless network because of lacking of frequency spectrum. Recent research results find that interference alignment can make the all users in network utilize the same frequency efficiently. In order to utilize the same frequency band with other interference alignment network and have no influence on it, an iterative algorithm for interference alignment between two networks is proposed. This algorithm based on eliminating the interference in new network can make all users communicate well. Numerical results show that new users will communicate as no interference and have no influence on other users when transmitters and receivers have enough antennas. If the transmitters or the receivers lack of antennas, the interference alignment network will degrade performance. Lack of antennas at transmitter will have more harm.

关 键 词：无线通信 干扰信道 预编码 干扰对齐 迭代算法 

分 类 号：TN915[电子电信—通信与信息系统]