On the Performance of Cooperative Spectrum Sensing under Quantization

Details On the Performance of Cooperative Spectrum Sensing under Quantization On the Performance of Cooperative Spectrum Sensing under Quantization

2011-09-15

arxiv.org/abs/1109.3272v1

Computer Science

Information Theory

submitted to IEEE Transactions on Wireless Communications

Scientific paper

In cognitive radio, the cooperative spectrum sensing (CSS) plays a key role in determining the performance of secondary networks. However, there have not been feasible approaches that can analytically calculate the performance of CSS with regard to the multi-level quantization. In this paper, we not only show the cooperative false alarm probability and cooperative detection probability impacted by quantization, but also formulate them by two closed form expressions. These two expressions enable the calculation of cooperative false alarm probability and cooperative detection probability tractable efficiently, and provide a feasible approach for optimization of sensing performance. Additionally, to facilitate this calculation, we derive Normal approximation for evaluating the sensing performance conveniently. Furthermore, two optimization methods are proposed to achieve the high sensing performance under quantization.

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