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CR Based Video Communication Testbed with Robust Spectrum Sensing/ Handoff

机译：基于CR基于CR的视频通信测试与强大的频谱感测/切换

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As radio spectrum is becoming congested, wireless communications require more efficient spectrum usage. Recently, the cognitive radio (CR) techniques have become attractive as they can utilize any unused spectrum. In this paper, we build a CR video communication test-bed, which implements spectrum sensing and spectrum handoff functionalities in USRP boards. We have implemented compressive spectrum sensing, intelligent spectrum handoff, multi-video-flow transmission, under TDMA scheduling and Raptor codes for reliable video transmissions. By using compressive sensing in spectrum sensing method, the spectrum detection accuracy is improved without much algorithm complexity, and it is also robust to the noise uncertainty due to the use of cyclostationary features. To realize intelligent spectrum handoff, we have designed a real-time jamming detection scheme, as well as synchronized spectrum switching method. We have also implemented a multi-point TDMA-based communication system, which enables any node to send out multiple video flows to different neighbors with pipelined and scheduled data transmissions. We also proposed a special rateless codes called prioritized Raptor codes for more reliable video transmission and implemented in the GNU Radio applications. The proposed CR video transmission testbed can be used for new protocol testing purpose.
机译：随着无线电频谱变得拥塞，无线通信需要更有效的频谱使用。最近，认知无线电（CR）技术已经变得有吸引力，因为它们可以利用任何未使用的光谱。在本文中，我们建立了CR视频通信测试床，其实现了USRP板中的频谱感测和频谱切换功能。我们在TDMA调度和Raptor码下实现了压缩频谱感测，智能频谱切换，多视频流传输，用于可靠的视频传输。通过使用频谱感测方法的压缩感测，可以在没有多种算法复杂性的情况下提高频谱检测精度，并且由于使用睫状体特征，对噪声不确定性也很稳健。为了实现智能频谱切换，我们设计了一个实时干扰检测方案，以及同步频谱切换方法。我们还实现了一种基于多点TDMA的通信系统，它使得任何节点都能够向不同的邻居发送多个视频流，具有流水线和调度的数据传输。我们还提出了一种特殊的代码，称为优先猛禽代码，用于更可靠的视频传输并在GNU无线电应用中实现。所提出的CR视频传输测试床可用于新的协议测试目的。

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