具有交替连接的拓扑干扰管理:Wyner型三用户干扰信道
Topological Interference Management with Alternating Connectivity: The Wyner-Type Three User Interference Channel
摘要:
在三用户干扰信道的干扰管理与交替连接,只有拓扑知识的发射机被认为是。该网络具有Wyner型信道风味,即,对于每个连通性状态,接收机除了它们的期望信号之外还观测到至多一个干扰信号。推导了自由度自由度的上界和下界。从一个计划的基础上联合编码的交替状态的下限。在连通性状态之间均匀分布的情况下,示出了信道具有2+ 1/9 DoF。与在每个状态上单独编码相比,这提供了DoF的增加,这仅实现了2个DoF。
英文摘要:
Interference management in a three-user interference channel with alternating connectivity with only topological knowledge at the transmitters is considered. The network has a Wyner-type channel flavor, i.e., for each connectivity state the receivers observe at most one interference signal in addition to their desired signal. Degrees of freedom (DoF) upper bounds and lower bounds are derived. The lower bounds are obtained from a scheme based on joint encoding across the alternating states. Given a uniform distribution among the connectivity states, it is shown that the channel has 2+ 1/9 DoF. This provides an increase in the DoF as compared to encoding over each state separately, which achieves 2 DoF only.
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