Applying cognitive radio concepts to HF communications
Applying cognitive radio concepts to HF communications
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DOI：
10.1049/cp.2009.0060
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发表时间：
2009-04
期刊：
影响因子：
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通讯作者：
E. Koski;W. Furman
中科院分区：
文献类型：
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作者：
E. Koski;W. Furman
认知无线电的概念最初是在1998年提出的，自那以后激发了越来越多的兴趣和研究活动。虽然“认知无线电”一词的正确定义仍然存在争议，但通常作为认知无线电的例子提供的概念似乎都涉及无线电系统可以感知其环境的相关特征，例如位置、频谱利用和频谱可用性，并根据法规限制、设备状态和其他因素智能地调整其行为和资源使用的方式，以最好地满足用户的通信需求。虽然在短波无线电系统中广泛使用的自动链路建立技术经常被用作早期有限形式的认知无线电的例子，但这一领域的大多数研究关注的是远高于短波30 MHz上限的通信频段。在本文中，我们首先简要概述了认知无线电概念的各种应用技术，并根据短波通信介质的独特特性及其典型用途考虑了这些技术在短波通信中的适用性。然后，我们考虑是否有独特的认知技术有希望改善短波通信的有效性，尽管它们在其他领域很少或没有受到关注，并讨论了影响认知技术成功应用于短波通信的前景的潜在挑战和关键成功因素。
The concept of cognitive radio, originally proposed in 1998, has since then inspired growing interest and research activity. While the proper definition of the term "cognitive radio" remains debated, the concepts commonly offered as examples of cognitive radio all seem to involve ways in which a radio system can sense relevant features of its environment such as location, spectrum utilization, and spectrum availability, and intelligently adapt its behaviour and resource usage in light of regulatory constraints, equipment state, and other factors, so as to best meet the communication needs of the user. While the automatic link establishment techniques widely used in HF radio systems are frequently offered as an example of an early, limited form of cognitive radio, most of the research attention in this area has been given to communications bands well above the 30 MHz upper limit of HF. In this paper, we first provide a concise overview of the variety of techniques that have been proposed as applications of the cognitive radio concept, and consider the applicability of these techniques to HF communications, in light of the distinctive characteristics of the HF communications medium and its typical uses. We then consider whether there might be distinctive cognitive techniques having promise to improve the effectiveness of HF communications, in spite of their having received little or no attention in other domains, and discuss potential challenges and critical success factors impacting the prospects for successful application of cognitive techniques to HF communications.