Cooperative relaying in multi-antenna fixed relay networks
Cooperative relaying in multi-antenna fixed relay networks
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DOI：
10.1109/twc.2007.05227
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发表时间：
2007-02
影响因子：
10.4
通讯作者：
A. Adinoyi;H. Yanikomeroglu
中科院分区：
文献类型：
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作者：
A. Adinoyi;H. Yanikomeroglu
空间、成本和信号处理约束等常常排除在无线终端处使用多个天线。本文研究了分布式解码和转发固定中继（基于基础设施的中继），这是从事在两跳无线网络中的合作，作为一种手段，消除无线终端上的多个天线的负担。与移动的终端相比，在基于基础设施的固定中继上部署少量天线是可行的，因此，本文研究了多天线对分布式协作固定中继性能的影响。研究和分析了多天线信号的基于门限的最大比合并（MRC）和基于门限的选择合并（SC）。研究发现，具有较少中继和许多天线的网络的端到端（E2E）错误性能并不比具有许多中继和较少天线的网络差。显然，前者的网络比后者具有巨大的部署成本优势。还观察到，其中中继器处的多个天线以SC方式配置的网络的E2E错误性能并不比其中使用MRC的网络差得多。对于实现，SC呈现出比成熟的MRC显著更低的复杂性和成本。本文的分析使用了多功能的Nakagami衰落信道，而不是以前大多数作品中使用的Rayleigh模型
Space, cost, and signal processing constraints, among others, often preclude the use of multiple antennas at wireless terminals. This paper investigates distributed decode-and-forward fixed relays (infrastructure-based relaying) which are engaged in cooperation in a two-hop wireless network as a means of removing the burden of multiple antennas on wireless terminals. In contrast to mobile terminals, the deployment of a small number of antennas on infrastructure-based fixed relays is feasible, thus, the paper examines the impact of multiple antennas on the performance of the distributed cooperative fixed relays. Threshold-based maximal ratio combining (MRC) and threshold-based selection combining (SC) of these multiple antenna signals are studied and analyzed. It is found that the end-to-end (E2E) error performance of a network which has few relays with many antennas is not significantly worse than that which has many relays each with a fewer antennas. Obviously, the former network has a tremendous deployment cost advantage over the latter. It is also observed that the E2E error performance of a network in which the multiple antennas at relays are configured in SC fashion is not significantly worse than that in which MRC is used. For implementation, SC presents a significantly lower complexity and cost than a full-blown MRC. The analysis in this paper uses the versatile Nakagami fading channels in contrast to the Rayleigh model used in most previous works