In this paper, we investigate a communication system in which unmanned aerial vehicles (UAVs) are used as relays between ground-based terminals and a network base station. We develop an algorithm for optimizing the performance of the ground-to-relay links through control of the UAV heading angle. To quantify link performance, we define the ergodic normalized transmission rate (ENTR) for the links between the ground nodes and the relay, and derive a closed-form expression for it in terms of the eigenvalues of the channel correlation matrix. We show that the ENTR can be approximated as a sinusoid with an offset that depends on the heading of the UAV. Using this observation, we develop a closed-form expression for the UAV heading that maximizes the uplink network data rate while keeping the rate of each individual link above a certain threshold. When the current UAV relay assignments cannot meet the minimum link requirements, we investigate the deployment and heading control problem for new UAV relays as they are added to the network, and propose a smart handoff algorithm that updates node and relay assignments as the topology of the network evolves.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Wireless Relay Communications with Unmanned Aerial Vehicles: Performance and Optimization


    Contributors:


    Publication date :

    2011-07-01


    Size :

    3026120 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Wireless communications and networking for unmanned aerial vehicles

    Saad, Walid / Bennis, Mehdi / Mozaffari, Mohammad et al. | TIBKAT | 2020


    Wireless communications and networking for unmanned aerial vehicles

    Saad, Walid / Bennis, Mehdi / Mozaffari, Mohammad et al. | TIBKAT | 2020


    SECURE COMMUNICATIONS WITH UNMANNED AERIAL VEHICLES

    KANTOR IGOR / SRIVASTAVA ASHOK N / PASKO DOUGLAS M et al. | European Patent Office | 2016

    Free access

    Secure communications with unmanned aerial vehicles

    KANTOR IGOR / SRIVASTAVA ASHOK N / PASKO DOUGLAS M et al. | European Patent Office | 2017

    Free access