Energy Efficiency Optimization for Rotatable Antenna-Enabled Uplink NOMA Systems
For wireless communication system designers, this work introduces a novel antenna configuration to improve energy efficiency in NOMA systems, though the gains are demonstrated only through simulations.
This paper proposes a rotatable antenna-enabled uplink NOMA system and develops an algorithm to maximize energy efficiency by jointly optimizing beamforming, power allocation, and antenna rotation. Numerical results show the proposed scheme outperforms benchmarks in energy efficiency.
This paper investigates a rotatable antenna (RA)-enabled uplink non-orthogonal multiple access (NOMA) system, where a base station equipped with multiple independently RAs serves both ground and aerial users. Specifically, we formulate an energy efficiency (EE) maximization problem by jointly optimizing receive beamforming, user power allocation, and RA rotation. To make the problem tractable, a new block coordinate descent-based algorithm is developed, in which the receive beamforming is updated via the minimum mean square error criterion, while the power allocation and RA rotation are handled by fractional programming and successive convex approximation. Numerical results demonstrate the EE superiority of the proposed RA-NOMA scheme over several benchmarks.