Cooperative Rate-Splitting for MISO Broadcast Channel with User Relaying, and Performance Benefits over Cooperative NOMA

Abstract

Due to its promising performance in a wide range of practical scenarios, Rate-Splitting (RS) has recently received significant attention in academia for the downlink of communication systems. In this letter, we propose and analyse a Cooperative Rate-Splitting (CRS) strategy based on the three-node relay channel where the transmitter is equipped with multiple antennas. By splitting user messages and linearly precoding common and private streams at the transmitter, and opportunistically asking the relaying user to forward its decoded common message, CRS can efficiently cope with a wide range of propagation conditions (disparity of user channel strengths and directions) and compensate for the performance degradation due to deep fading. The precoder design and the resource allocation are optimized by solving the Weighted Sum Rate (WSR) maximization problem. Numerical results demonstrate that our proposed CRS scheme can achieve an explicit rate region improvement compared to its non-cooperative counterpart and other cooperative strategies (such as cooperative NOMA).

References in corpus (6)

• Rate-Splitting Multiple Access for Downlink Communication Systems: Bridging, Generalizing and Outperforming SDMA and NOMA
• Rate Splitting for MIMO Wireless Networks: A Promising PHY-Layer Strategy for LTE Evolution
• A Rate Splitting Strategy for Massive MIMO with Imperfect CSIT
• Robust Transmission in Downlink Multiuser MISO Systems: A Rate-Splitting Approach
• Energy Efficiency of Rate-Splitting Multiple Access, and Performance Benefits over SDMA and NOMA
• Rate-Splitting for Multi-Antenna Non-Orthogonal Unicast and Multicast Transmission: Spectral and Energy Efficiency Analysis

Cited by in corpus (11)

• Rate-Splitting Multiple Access: Fundamentals, Survey, and Future Research Trends
• Max-min Fairness of K-user Cooperative Rate-Splitting in MISO Broadcast Channel with User Relaying
• Transmission Scheme, Detection and Power Allocation for Uplink User Cooperation with NOMA and RSMA
• On Secure mmWave RSMA Systems
• Precoding Based Downlink OAM-MIMO Communications with Rate Splitting
• Robust Beamforming Design for Rate Splitting Multiple Access-Aided MISO Visible Light Communications
• Beyond Dirty Paper Coding for Multi-Antenna Broadcast Channel with Partial CSIT: A Rate-Splitting Approach
• Rate-Splitting Multiple Access for Overloaded Cellular Internet of Things
• Rate-Splitting Multiple Access for Multigroup Multicast and Multibeam Satellite Systems
• Cooperative Rate-Splitting for Secrecy Sum-Rate Enhancement in Multi-antenna Broadcast Channels
• Rate-Splitting Multiple Access for Multigroup Multicast Cellular and Satellite Communications: PHY Layer Design and Link-Level Simulations