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Blind Energy-based Detection for Spatial Spectrum Sensing

机译:基于盲能量的空间光谱检测

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Conventional energy detection (ED) spectrum sensing method requires the knowledge of noise power and consequently suffers from noise uncertainty. In this letter we propose a novel blind spatial spectrum sensing method to conquer this problem. We utilize an Electronically Steerable Parasitic Antenna Receptor (ESPAR) which can divide the space into several sectors and switch receive beampattern to each sector in a time-division fashion. The difference of received signal energies among sectors heavily depends on the presence/absence of the primary user (PU) signal. Motivated by this fact, we introduce a blind energy-based spatial spectrum sensing algorithm using the ratio of maximum-minimum energy (MMEN). The MMEN spectrum sensing method can overcome the noise uncertainty problem and achieve higher accuracy performance with lower computational complexity. Theoretical performance analysis of the proposed MMEN method is also provided. Simulation results are presented to verify the efficiency of the proposed algorithm.
机译:传统的能量检测(ED)频谱感测方法需要了解噪声功率,因此会遭受噪声不确定性的困扰。在这封信中,我们提出了一种新颖的盲空间光谱传感方法来解决这个问题。我们利用电子可控寄生天线接收器(ESPAR),可以将空间划分为几个扇区,并以时分方式将接收波束图切换到每个扇区。扇区之间接收信号能量的差异在很大程度上取决于主要用户(PU)信号的存在与否。基于这一事实,我们引入了一种基于最大最小能量之比(MMEN)的基于盲能量的空间频谱感测算法。 MMEN频谱感测方法可以克服噪声不确定性问题,并以较低的计算复杂度实现更高的精度性能。还提供了所提出的MMEN方法的理论性能分析。仿真结果表明了该算法的有效性。

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