On the Design of Network Coding for Multiple Two-Way Relaying Channels
On the Design of Network Coding for Multiple Two-Way Relaying Channels
复制标题
多双向中继通道的网络编码设计
DOI：
10.1109/twc.2011.041311.100705
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发表时间：
2011-06-01
影响因子：
10.4
通讯作者：
Leung, Kin K.
中科院分区：
文献类型：
--
作者：
Ding, Zhiguo;Wang, Tong;Leung, Kin K.
本文研究了多个双向中继信道的网络编码设计问题。所有的节点都配备了多个天线，我们专注于一个特定的场景，其中的源有较少的天线比中继。对于这种情况，为具有单对的场景开发的现有协议的应用必须依赖于分时方法，这将导致可靠性和吞吐量的一些损失。在本文中，我们开发了一种新的网络编码传输协议，可以看作是传统的波束形成和最近发展的信号对齐方法的组合。通过使用这样的协议，所有M对源节点可以在两个时隙内完成信息交换。我们已经开发的分析结果，如中断概率和分集复用的权衡，这表明，所提出的传输协议可以实现更大的复用增益比分时方法。此外，所提出的网络编码方案扩展到源节点只有一个天线的特殊情况。仿真结果表明了所提出的网络编码方案的性能。
In this paper, we study the design of network coding for the multiple two-way relaying channels where multiple pairs of sources wish to exchange information with their partners. All nodes are equipped with multiple antennas, and we focus on a particular scenario where the sources have less antennas than the relay. For such a case, the application of existing protocols developed for the scenario with a single pair has to rely on the time sharing approach, which will result in some loss of reliability and throughput. In this paper, we develop a new network coding transmission protocol which can be viewed as a combination of traditional beamforming and the recently developed approaches of signal alignment. By using such a protocol, all M pairs of source nodes can accomplish information exchanging within two time slots. We have developed analytical results, such as outage probability and diversity-multiplexing tradeoff, which demonstrate that the proposed transmission protocol can achieve a larger multiplexing gain than the time sharing approach. Furthermore, the proposed network coding scheme is extended to the special case where source nodes only have a single antenna. Simulation results have been provided to demonstrate the performance of the proposed network coding schemes.