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A novel spectrum sensing technique based on diversity reception

机译：一种基于分集接收的新型频谱感知技术

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摘要

Spectrum sensing is one of the key technologies in Cognitive Radio. A conventional approach to sensing primary user signal is using single antenna. Due to multi-path fading and shadowing effect, detection is unreliable. This can make cognitive radio susceptible to the “hidden node” problem. This paper proposes a novel spectrum sensing technique based on diversity reception by combining multi-antenna technology with energy detection. Firstly, received signals of primary users coming from every antenna are processed by diversity reception technique. Secondly, cognitive user judges the presence of primary user by energy detection. Simulation results show: Spectrum sensing technique based on diversity reception could improve reliability of energy detection and increase the detection performance significantly to primary user signal, overcoming the “hidden node” problem effectively.
机译：频谱感测是认知无线电中的关键技术之一。感测主要用户信号的常规方法是使用单个天线。由于多径衰落和阴影效应，检测不可靠。这会使认知无线电容易受到“隐藏节点”问题的影响。本文提出了一种新的基于分集接收的频谱感知技术，将多天线技术与能量检测相结合。首先，通过分集接收技术处理来自每个天线的主要用户的接收信号。其次，认知用户通过能量检测来判断主要用户的存在。仿真结果表明：基于分集接收的频谱感知技术可以提高能量检测的可靠性，并显着提高主要用户信号的检测性能，有效克服了“隐藏节点”问题。

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