Coded Cooperation for Ad Hoc Networks with Spatial Multiplexing
Coded Cooperation for Ad Hoc Networks with Spatial Multiplexing
复制标题
空间复用自组织网络的编码合作
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. Zorzi
中科院分区：
文献类型：
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作者：
M. Levorato;S. Tomasin;M. Zorzi
本文设计了一种基于协同空间复用（SM）的网络，能够自适应支持具有多天线和多协作节点的终端。我们的建议克服了现有基于空时分组码（STBC）的合作网络的局限性，即它们需要符号同步和合作建立的信令开销。此外，本文提出的合作方案旨在提高整体网络性能，而文献中的大多数建议都侧重于单链路性能。为了最大限度地利用无线电资源，在非合作阶段和合作阶段都集成了决策反馈多用户接收机。采用线性擦除包码实现的混合自动重复请求（ARQ）错误控制机制，进一步提高了协作效率。同样，在这种情况下，基于分组的编码允许没有信令开销来进行协作。通过对具有多个节点的真实网络场景的完整PHY和MAC层的仿真，提供了广泛的结果。
In this paper we design a network based on cooperative spatial multiplexing (SM), capable to adaptively support terminals with multiple antennas and multiple cooperating nodes. Our proposal overcomes limitations of existing cooperative networks based on space-time block codes (STBC), i.e., their need for symbol synchronization and signalling overhead for cooperation setup. Furthermore, the presented cooperation scheme is designed with the aim of improving the overall network performance, while most of the proposals in the literature focus on single link performance. SM is integrated with decision- feedback multiuser receivers for both the non-cooperative and the cooperative phases in order to maximize the use of radio resources. The cooperation efficiency is further enhanced by using a hybrid automatic repeat request (ARQ) mechanism for error control, implemented with linear erasure packet codes. Also in this case, the packet-based coding allows to have no signalling overhead for cooperation. Extensive results are provided, obtained by simulation of the complete PHY and MAC layers for a realistic network scenario with several nodes.