Spectrum Sensing and Sharing for Cognitive Radar Systems

The IEEE 802.22 standard specifies the air interface, including the cognitive medium access control layer (MAC) and physical layer (PHY), of point-to-multipoint wireless regional area networks (WRAN) comprised of a professional fixed Base Station (BS) with fixed and portable user terminals, referred as the Customer Premise Equipment (CPE) devices, operating in the white spaces in the VHF/UHF TV broadcast bands while avoiding interference to the incumbent broadcast services. This work focuses on a Passive Coherent Location (PCL) system that exploits the signals emitted by IEEE 802.22 devices and is referred hereafter as a White Space PCL (WS-PCL) system. To cope with the very low transmitted EIRP of the IEEE 802.22 emitters, we focus on the design of a WS-PCL system that exploits all the useful signals received in each frame, and therefore the signals emitted from both the BS and CPEs. In this work we study the feasibility of the WS-PCL system, we derive the Receiver Operating Characteristic (ROC) of the WS-PCL receiver and we define a multistatic velocity profiling algorithm for the estimation of the target velocity vector. The performances of the proposed receiver are compared with those of a WS-PCL system that exploits only the signal emitted by the BS