Forward Interference Avoidance in Ad Hoc Communications Using Adaptive Array Antennas
Forward Interference Avoidance in Ad Hoc Communications Using Adaptive Array Antennas
复制标题
使用自适应阵列天线避免自组织通信中的前向干扰
DOI：
10.1093/ietcom/e91-b.9.2940
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发表时间：
2008
期刊：
影响因子：
--
通讯作者：
Yasuo Suzuki
中科院分区：
文献类型：
--
作者：
Tomofumi Sakaguchi;Y. Kamiya;T. Fujii;Yasuo Suzuki
以自组织网络为代表的无线自组织通信已经引起了研究者的广泛关注。由于能够在没有任何集中控制设施的情况下，由节点自主地配置无线链路，它们有望成为“无所不在”联网的关键技术。自适应阵列天线(AAA)利用其自适应波束形成能力，有望提高网络效率。然而，需要注意的是，AAA并不是万能的。它的干扰对消能力受到自由度和角分辨率作为单元天线数量的函数的限制。如果不考虑这些问题，应用AAA可能会降低网络的效率。让我们考虑无线自组织通信作为AAA的目标应用，利用AAA的干扰消除能力。与其他无线系统相比，低自由度和不充分的分辨率将是关键问题，因为在这样的系统中没有集中的设施来控制节点以避免干扰。在没有任何定时控制的情况下，许多干扰可能从任何到达方向(DOA)冲击节点。本文针对AAA在自组织通信中应用的局限性，提出了一种将AAA应用于自组织通信的新方案--前向干扰避免(FIA)，以避免由于AAA能力的限制而引起的问题。它使节点能够避免与其他节点的干扰，从而增加共存的无线链路的数量。通过计算机仿真研究了自组织通信在共存链路数目方面的性能改善。
Wireless ad hoc communications such as ad hoc networks have been attracting researchers' attention. They are expected to become a key technology for “ubiquitous” networking because of the ability to configure wireless links by nodes autonomously, without any centralized control facilities. Adaptive array antennas (AAA) have been expected to improve the network efficiency by taking advantage of its adaptive beamforming capability. However, it should be noted that AAA is not almighty. Its interference cancellation capability is limited by the degree-of-freedom (DOF) and the angular resolution as a function of the number of element antennas. Application of AAA without attending to these problems can degrade the efficiency of the network. Let us consider wireless ad hoc communication as a target application for AAA, taking advantage of AAA's interference cancellation capability. The low DOF and insufficient resolution will be crucial problems compared to other wireless systems, since there is no centralized facility to control the nodes to avoid interferences in such systems. A number of interferences might impinge on a node from any direction of arrival (DOA) without any timing control. In this paper, focusing on such limitations of AAA applied in ad hoc communications, we propose a new scheme, Forward Interference Avoidance (FIA), using AAA for ad hoc communications in order to avoid problems caused by the limitation of the AAA capability. It enables nodes to avoid interfering with other nodes so that it increases the number of co-existent wireless links. The performance improvement of ad hoc communications in terms of the number of co-existent links is investigated through computer simulations.
Ad Hoc网络中防耳聋的定向MAC协议
DOI：
--
发表时间：
2007
期刊：
IEICE (Institute of Electronics, Information and Communication Engineers) Transactions on Communications Vol.E90-B, No.4
影响因子：
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作者：
Masanori Takata;Masanori Takata;Masanori Takata
通讯作者：
Masanori Takata