Active RIS-Assisted Uplink NOMA with MADDPG for Remote State Estimation in Wireless Sensor Networks

• Published in: Sensors (Basel, Switzerland) Vol. 25; no. 15; p. 4878
• Main Authors: Li, Rongzhen, Xu, Lei
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 07.08.2025; MDPI
• Subjects: Accuracy; Adaptability; Decision making; Energy efficiency; Internet of Things; MADDPG algorithm; Optimization; Parameter estimation; RIS; RSE error; Sensors; uplink NOMA; wireless sensor networks; wireless sensor networks; RIS; uplink NOMA; RSE error; MADDPG algorithm

Non-orthogonal multiple access (NOMA) and reconfigurable intelligent surfaces (RISs) are recognized as key technologies for beyond 5G and 6G wireless communications. To address the high computational complexity and non-convex optimization challenges, this letter proposes an optimization framework ba...