Distributed space-time coded protocols for exploiting cooperative diversity in wireless networks
Distributed space-time coded protocols for exploiting cooperative diversity in wireless networks
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DOI：
10.1109/glocom.2002.1188045
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发表时间：
2002-11
期刊：
影响因子：
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通讯作者：
J. N. Laneman;G. Wornell
中科院分区：
文献类型：
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作者：
J. N. Laneman;G. Wornell
我们开发和分析空时编码协作分集协议，以对抗无线网络中多个协议层的多径衰落。这些协议利用一组分布式终端之间可用的空间分集，这些终端以这样一种方式相互中继消息，即目的地终端可以平均衰落，即使先验地不知道将涉及哪些终端。特别是，源发起到其目的地的传输，并且许多中继可能接收该传输。那些能够完全解码传输的终端利用空时码协作中继到目的地。我们证明这些协议在协作终端的数量上实现了完全的空间分集，而不仅仅是解码中继的数量，并且可以有效地用于比基于重复的方案更高的频谱效率。我们讨论与这些协议的时空代码设计相关的问题，强调易于实现有吸引力的分布式版本的代码。
We develop and analyze space-time coded cooperative diversity protocols for combating multipath fading across multiple protocol layers in a wireless network. The protocols exploit spatial diversity available among a collection of distributed terminals that relay messages for one another in such a manner that the destination terminal can average the fading, even though it is unknown a priori which terminals will be involved. In particular, a source initiates transmission to its destination, and many relays potentially receive the transmission. Those terminals that can fully decode the transmission utilize a space-time code to cooperatively relay to the destination. We demonstrate that these protocols achieve full spatial diversity in the number of cooperating terminals, not just the number of decoding relays, and can be used effectively for higher spectral efficiencies than repetition-based schemes. We discuss issues related to space-time code design for these protocols, emphasizing codes that readily allow for appealing distributed versions.