Distributed space-time-coded protocols for exploiting cooperative diversity in wireless networks

被引：2852

作者：

Laneman, JN ^{[1
]}

Wornell, GW ^{[1
]}

机构：

[1] MIT, Dept Elect Engn & Comp Sci, Cambridge, MA 02139 USA

来源：

IEEE TRANSACTIONS ON INFORMATION THEORY | 2003年 / 49卷 / 10期

关键词：

diversity techniques; fading channels; outage probability; relay channel; user cooperation; wireless networks;

D O I：

10.1109/TIT.2003.817829

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

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.

引用

页码：2415 / 2425

页数：11

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