Distributed Interference Management: A Broadcast Approach
Distributed Interference Management: A Broadcast Approach
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DOI：
10.1109/tcomm.2020.3026386
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发表时间：
2021-01
影响因子：
8.3
通讯作者：
Maha Zohdy;A. Tajer;S. Shamai
中科院分区：
文献类型：
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作者：
Maha Zohdy;A. Tajer;S. Shamai
多用户干扰信道中有效的干扰管理在很大程度上取决于发射机处信道状态信息的可用性。在广泛范围的新兴大规模和分布式网络（例如，物联网），但是由于CSIT强加的广泛的信息交换，获取CSIT是禁止的。结果，依赖于CSIT的干扰管理方法在这种情况下失去了它们的有效性。本文针对双用户干扰信道，提出了一种广播干扰管理方法。它的特点是，发射机，不像接收机，是完全无视瞬时信道状态。每个发射机将其消息分成多个叠加的编码信息层，其中每个层适合于所有信道的组合状态的给定可能状态。根据直接信道和干扰信道之间的相对增益，每个接收器机会性地解码两个发射器的接收层的子集。一个平均可达速率区域划定，作为一个内界的高斯干扰信道的平均容量区域的CSIT的情况下。最后，建立可实现的和速率与和速率容量之间的差距的上界。
Effective interference management in the multiuser interference channel strongly hinges on the channel state information’s availability at the transmitters (CSIT). In a broad range of emerging large-scale and distributed networks (e.g., the Internet of Things), acquiring the CSIT is prohibitive due to the extensive information exchange that it imposes. As a result, the interference management approaches that rely on the CSIT lose their effectiveness in such circumstances. This article focuses on the two-user interference channel and proposes a broadcast approach to interference management. Its hallmark is that the transmitters, unlike the receivers, are entirely oblivious to instantaneous channel states. Each transmitter splits its message into multiple superimposed encoded information layers, where each layer is adapted to a given possible state for the combined states of all channels. Depending on the relative gain between the direct and interfering channels, each receiver opportunistically decodes a subset of both transmitters’ received layers. An average achievable rate region is delineated, serving as an inner bound on the Gaussian interference channel’s average capacity region in the absence of CSIT. Finally, an upper bound on the gap between the achievable sum-rate and the sum-rate capacity is established.