Cooperative spectrum sensing in cognitive radio, part I: Two user networks
Cooperative spectrum sensing in cognitive radio, part I: Two user networks
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DOI：
10.1109/twc.2007.05775
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发表时间：
2007-06-01
影响因子：
10.4
通讯作者：
Li, Ye (Geoffrey)
中科院分区：
文献类型：
--
作者：
Ganesan, Ghurumuruhan;Li, Ye (Geoffrey)
在认知无线网络中，认知（未经许可）用户需要连续监视主要（许可）用户的频谱。在本文中，我们说明了认知无线电中合作的好处。我们表明，通过允许认知用户在同一频段合作，我们可以减少检测时间，从而提高整体敏捷性。我们首先考虑一个两用户的认知无线网络，并展示如何利用网络中的固有不对称性来提高敏捷性。我们表明，我们的合作计划将认知用户的敏捷性提高了35％。然后，我们将我们的合作计划扩展到每个载体两个用户的多载波网络，并分析渐近敏捷性增长。我们制定了一个分散的合作协议，该协议可确保任意大型认知网络人口的敏捷性增长。
In cognitive radio networks, cognitive (unlicensed) users need to continuously monitor spectrum for the presence of primary (licensed) users. In this paper, we illustrate the benefits of cooperation in cognitive radio. We show that by allowing the cognitive users operating in the same band to cooperate we can reduce the detection time and thus increase the overall agility. We first consider a two-user cognitive radio network and show how the inherent asymmetry in the network can be exploited to increase the agility. We show that our cooperation scheme increases the agility of the cognitive users by as much as 35%. We then extend our cooperation scheme to multicarrier networks with two users per carrier and analyze asymptotic agility gain.In Part II of our paper [1], we investigate multiuser single carrier networks. We develop a decentralized cooperation protocol which ensures agility gain for arbitrarily large cognitive network population.