English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Unmanned Aerial Vehicles (UAV)-enabled communication is a promising solutionfor secure air-to-ground (A2G) networks due to the additional secure degrees offreedom afforded by mobility. However, the jittering characteristics caused bythe random airflow and the body vibration of the UAV itself have anon-negligible impact on the performance of UAV communication. Considering theimpact of UAV jittering, this paper propose a robust and secure transmissiondesign assisted by an novel active intelligent reflecting surface (IRS),wherethe reflecting elements in IRS not only adjust the phase shift but also amplifythe amplitude of signals. Specifically, under the worst-case secrecy rateconstraints, we aim to minimize the transmission power by the robust jointdesign of active IRS's reflecting coefficient and beamforming at the UAV-bornebase station (UBS). However,it is challenging to solve the joint optimizationproblem due to its non-convexity. To tackle this problem, the non-convexproblem is reformulated with linear approximation for the channel variationsand linear matrix inequality transformed by S-procedure and Schur's complement.Then, we decouple this problem into two sub-problems, namely, passivebeamforming and active IRS's reflecting coefficient optimization, and solvethem through alternate optimization (AO). Finally, the numerical resultsdemonstrate the potential of active IRS on power saving under securetransmission constraints and the impact of UAV jittering.

Active Intelligent Reflecting Surface Assisted Secure Air-to-Ground Communication with UAV Jittering