Virtual occupancy in cognitive radio

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI:10.1109/DYSPAN.2011.5936221

M. Burke, Bridget T Lally, A. Kerans

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引用次数: 6

Abstract

Cognitive radio technologies have the potential to increase the efficiency and effectiveness with which the radiofrequency spectrum is used. However, before cognitive radio devices are brought into widespread use, planning and regulatory arrangements must be considered and developed where appropriate to ensure adequate protection for existing users. This paper addresses the issue of harmful intermodulation interference caused by the mixing of a transmission from a cognitive radio device with that from a licensed transmitter in the land mobile radio service. Due to the generation of intermodulation products, seemingly open channels may be unable to be used by cognitive radio devices. This situation is termed virtual occupancy. In this paper, a model is described to characterise the effect of virtual occupancy on the availability of channels for use by a cognitive radio device in the land mobile service in the radiofrequency band from 450 to 470 MHz. The results show that for areas where the spectrum is highly allocated, virtual occupancy could be a significant barrier to the deployment of cognitive radios in the land mobile radio service.

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认知无线电中的虚拟占用

认知无线电技术具有提高射频频谱使用效率和有效性的潜力。然而，在认知无线电装置得到广泛使用之前，必须酌情考虑和制定规划和管理安排，以确保对现有用户的充分保护。本文讨论了在陆地移动无线电业务中，由认知无线电设备的传输与许可发射机的传输混合而引起的有害互调干扰问题。由于互调产品的产生，看似开放的信道可能无法被认知无线电设备使用。这种情况被称为虚拟占用。在本文中，描述了一个模型来描述虚拟占用对450至470 MHz射频频段内陆地移动业务中认知无线电设备使用的信道可用性的影响。结果表明，在频谱高度分配的地区，虚拟占用可能成为在陆地移动无线电业务中部署认知无线电的重大障碍。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN)

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