Active and Passive Beamforming for IRS-Aided Vehicle Communication

• Xiangping Kong,
• Yu Wang,
• Lei Zhang,
• Yulong Shang,
• Ziyan Jia,

Vol. 17, No. 5, May 31, 2023
10.3837/tiis.2023.05.011, Download Paper (Free):

• Intelligent reflecting surface
• Convex optimization
• Vehicular Communication
• V2I and V2V communication
• beamforming

Abstract

This paper considers the jointly active and passive beamforming design in the IRS-aided MISO downlink vehicle communication system where both V2I and V2V communication paradigms coexist.We formulate the problem as an optimization problem aiming to minimize the total transmit power of the base station subject to SINR requirements of both V2I and V2V users, total transmit power of base station and IRS’s phase shift constraints. To deal with this non-convex problem, we propose a method which can alternately optimize the active beamforming at the base station and the passive beamforming at the IRS. By using first-order Taylor expansion, matrix analysis theory and penalized convex-concave process method, the non-convex optimization problem with coupled variables is converted into two decoupled convex sub-problems. The simulation results show that the proposed alternate optimization algorithm can significantly decrease the total transmit power of the vehicle base station.

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