Influence of Transmission Channel on Propagating Primary User Signals Based on Polarization Adaptation Detector

Cognitive Radios are proposed for secondary users (SU) recovering spectrum holes unused by primary users (PU) on the multi-dimension. Polarization spectrum sensing technology is a novel spectrum sensing technology which detects spectrum holes of polarization domain exist in the secondary spectrum usage scenario. In this paper, firstly the dual hypothesis models of a polarization spectrum holes sensing scheme—polarization adaptation detector is constructed based on different transmission channels. Secondly, the influence of the transmission channel on the polarization state(α 0,φ 0) of the propagating PU signal are evaluated. At last, the detection performance of polarization adaptation detector is analyzed and compared in different transmission channels. The insights gained are potentially useful to those engaged in the development and validation of polarization detection algorithms in polarization spectrum sensing for cognitive radios.

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