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arXiv 1406.3495cs.NIcs.ITmath.IT
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一种提高频谱感知性能的新方案

A Novel Scheme to improve spectrum sensing performance

S. Taruna, Bhumika Pahwa

摘要:

由于仅许可用户的频谱可用性有限,因此非许可用户对二次接入的需求正在增加。事实证明,认知无线电有助于这种情况,因为所需要的只是一种技术,可以有效地检测空闲空间并将其提供给辅助设备,而不会对主要(许可)用户造成任何干扰。频谱感知是认知无线电的首要功能,它感知环境中的空白空间。能量检测是正在研究的各种频谱感测技术之一。早先已经表明,与瑞利信道相比,能量检测在AWGN信道下工作得更好,然而,传统的频谱感测技术具有高的虚警概率,并且对于较高的SNR值也显示出更好的检测概率。需要一种新技术,其显示出降低的虚警概率以及对于较低值的SNR的检测概率的增加。在目前的工作中,传统的能量检测技术已得到加强,以获得更好的结果。

英文摘要:

Due to limited availability of spectrum for licensed users only, the need for secondary access by unlicensed users is increasing. Cognitive radio turns out to be helping this situation because all that is needed is a technique that could efficiently detect the empty spaces and provide them to the secondary devices without causing any interference to the primary (licensed) users. Spectrum sensing is the foremost function of the cognitive radio which senses the environment for white spaces. Energy detection is one of the various spectrum sensing techniques that are under research. Earlier it was shown that energy detection works better under AWGN channel as compared to Rayleigh channel, however the conventional spectrum sensing techniques have a high probability of false alarm and also show a better probability of detection for higher values of SNR. There is a need for a new technique that shows a reduced probability of false alarm as well as an increase in the probability of detection for lower values of SNR. In the present work the conventional energy detection technique has been enhanced to get better results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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