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This paper proposes a passive UHF RFID indoor localization system for both tag and tag-free target based on interference. We take number of tags as landmarks and interpolate virtual tags using nature-neighbour interpolation. We monitor the interference by measuring the phase difference of reference tags. Two situations are considered: on the ground and in free-space. When tag or tag-free target is...
The paper investigates a decode-and-forward buffer-aided relay selection for an underlay cognitive radio network in the presence of an eavesdropper. The secondary users operating on the same band used by primary user, so the QoS of primary user should be guaranteed. Eavesdropper can intercept the information transmission from the secondary transmitter or relay to the corresponding receiver, which...
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