● PNT Tactical Data Link based on CR/SDR Ad-hoc Network
Currently, we are researching PNT tactical data link using CR and SDR technology. PNT tactical data link has a hierarchical structure based on CR ad-hoc networks. Each communication unit coexists with secondary users and primary users through dynamic spectrum access CR-MAC protocol and exchange data in the multi-hop CR environments by exploiting CR network/transport protocols.
We are developing the CR ad-hoc network protocols and time synchronization protocol on the simulator and we implement the protocols on a CR ad-hoc network HW platform which is based on SDR. To meet the characteristics of CR ad-hoc network HW platform, which has cognitive capability and reconfigurability, we use the state-of-the-art SDR device. By using the SDR device, we can change several reconfigurable parameters to test and evaluate the PNT tactical data link prototype.