Spectrum mobility demonstration of SMSE based overlay cognitive radio via software defined radio

2011 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) Pub Date : 2011-05-03 DOI:10.1109/DYSPAN.2011.5936270

Ruolin Zhou, Xue Li, V. Chakravarthy, Zhiqiang Wu

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引用次数: 2

Abstract

In our previous work, we have demonstrated an interference avoidance overlay cognitive radio using software defined radio [1][2]. By employing spectrally modulated spectrally encoded (SMSE) framework based multi-carrier transmission waveforms, the cognitive radio is capable of turning off certain subcarriers to avoid interference to the primary users in the band. Hence, the cognitive radio operates over multiple noncontiguous spectrum holes. Here, we extend our previous work to implement and demonstrate spectrum mobility in cognitive radio. Specifically, while the cognitive radio operates over a 2MHz band, the cognitive radio will continuously sense the spectrum wider than the 2MHz band. When the total available spectrum, which is determined by stitching all spectrum holes together in the 2MHz band, is insufficient to support the required cognitive radio transmission, the cognitive radio dynamically moves to a different frequency band where enough spectrum holes exist. We demonstrate real time video transmission between two cognitive radio nodes and seamless transition when the spectrum handoff occurs.

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基于软件定义无线电的SMSE叠加认知无线电频谱移动性论证

在我们之前的工作中，我们已经展示了使用软件定义无线电的干扰避免覆盖认知无线电[1][2]。通过采用基于频谱调制频谱编码(SMSE)框架的多载波传输波形，认知无线电能够关闭某些子载波，以避免对频带内主要用户的干扰。因此，认知无线电在多个不连续的频谱孔上工作。在这里，我们扩展了之前的工作，以实现和演示认知无线电中的频谱移动性。具体来说，当认知无线电在2MHz频段上工作时，认知无线电将持续感知比2MHz频段更宽的频谱。当2MHz频段内所有频谱孔拼接在一起确定的总可用频谱不足以支持所需的认知无线电传输时，认知无线电动态移动到存在足够频谱孔的其他频段。我们演示了两个认知无线电节点之间的实时视频传输以及频谱切换时的无缝过渡。

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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