This work focuses on the promising Rate-Splitting Multiple Access (RSMA) and its beamforming design problem to achieve max-min fairness (MMF) among multiple co-channel multicast groups with imperfect channel state information at transmitter (CSIT). Contrary conventional linear precoding (NoRS) that relies fully treating any residual interference as noise, we consider a novel multigroup strategy based RSMA. RSMA linearly precoded (RS) Successive Interference Cancellation (SIC) receivers, has...

Extreme crowding of electromagnetic spectrum in recent years has led to the challenges designing sensing and communications systems. Both systems require a broad range bandwidth, thus resulting competing interests exploiting spectrum. Efficient hardware utilization have emergence integrated (ISAC) systems, which recently emerged as candidate 6G technology. In particular, we provide potential techniques, namely opportunistic ISAC optimized ISAC. Rate-splitting multiple access (RSMA) is...

This paper investigates the joint beamforming design problem to achieve max-min rate fairness in a satellite-terrestrial integrated network (STIN) where satellite provides wide coverage multibeam multicast users (SUs), and terrestrial base station (BS) serves multiple cellular (CUs) densely populated area. Both BS operate same frequency band. Since rate-splitting access (RSMA) has recently emerged as promising strategy for non-orthogonal transmission robust interference management...

This paper studies the precoder design problem of achieving max-min fairness (MMF) amongst users in multigateway multibeam satellite communication systems with feeder link interference. We propose a beamforming strategy based on newly introduced transmission scheme known as rate-splitting multiple access (RSMA). RSMA relies multi-antenna at transmitter and successive interference cancellation (SIC) receivers, such that intended message for user is split into common part private partially...

This letter is the second part of a three-part tutorial focusing on rate-splitting multiple access (RSMA) for 6G. As Part II tutorial, this addresses interplay between RSMA and integrated radar sensing communications (ISAC). In particular, we introduce general RSMA-assisted ISAC architecture, where platform has dual capability to simultaneously communicate with downlink users probe detection signals moving target. Then, metrics are respectively introduced, followed by waveform design example...

Rate-splitting multiple access (RSMA) softly reconciles and decodes the extreme interference by non-orthogonal transmission, which can remarkably solve spectrum scarcity for future six-generation (6G) low earth orbits (LEO) satellite communication system. In this letter, we investigate power allocation problem in LEO networks with RSMA mechanism based on deep reinforcement learning (DRL) technique. Specifically, order to achieve better performance, base station (SBS) has effectively allocate...

This paper studies the beamforming design problem to achieve max-min fairness (MMF) in multibeam satellite communications. Contrary conventional linear precoding (NoRS) that relies on fully treating any residual interference as noise, we consider a novel multicast strategy based Rate-Splitting Multiple Access (RSMA). RSMA linearly precoded rate-splitting (RS) at transmitter and Successive Interference Cancellation (SIC) receivers enable flexible framework for non-orthogonal transmission...

In this paper, we initiate the study of rate-splitting multiple access (RSMA) for a mono-static integrated sensing and communication (ISAC) system, where dual-functional base station (BS) simultaneously communicates with users detects moving targets. We aim at optimizing ISAC waveform to jointly maximize max-min fairness (MMF) rate minimize largest eigenvalue Cramér-Rao bound (CRB) matrix unbiased estimation. The CRB considered in work is general as it involves estimation angular direction,...

Rate-splitting multiple access (RSMA) is a promising technique for downlink multi-antenna communications owning to its capability of enhancing the system performance in wide range network loads, user deployments and channel state information at transmitter (CSIT) inaccuracies. In this paper, we investigate achievable rate RSMA multi-user multiple-input single-output (MU-MISO) where only slow-varying statistical (CSI) available transmitter. RSMA-based beamforming split common stream optimized...

Rate-splitting multiple access (RSMA), relying on linearly precoded rate-splitting (RS) at the transmitter and successive interference cancellation (SIC) receivers has emerged as a powerful flexible strategy for downlink multi-user multi-antenna systems. Through message splitting transmission of both common private messages, RSMA been demonstrated to be robust management which enables partially decoding treating noise. In this work, we consider application in multigroup multicast scenario,...

Rate-splitting multiple access (RSMA) is an emerging technique for multi-antenna networks that splits messages into common and private parts flexible interference mitigation. Motivated by its robustness scalability, it promising to employ RSMA in integrated satellite-terrestrial (ISTN), where a satellite serves users (SUs) broadly with multibeam multicast transmission while terrestrial base station (BS) cellular (CUs) unicast transmission, operating the same frequency band. To avoid data...

Low earth orbit (LEO) satellite systems with sensing functionality are envisioned to facilitate global-coverage service and emerging applications in 6G. Currently, two fundamental challenges, namely, inter-beam interference among users power limitation at the LEO satellites, limit full potential of joint design communication. To effectively control interference, a rate-splitting multiple access (RSMA) scheme is employed as management strategy system design. On other hand, address limited...

Low earth orbit (LEO) satellite systems with sensing functionality is envisioned to facilitate global-coverage service and emerging applications in 6G. Currently, two fundamental challenges, namely, inter-beam interference among users power limitation at the LEO satellites, limit full potential of joint design communication. To effectively control interference, rate-splitting multiple access (RSMA) scheme employed as management strategy system design. On other hand, address limited supply we...

Future wireless networks, in particular, 5G and beyond, are anticipated to deploy dense Low Earth Orbit (LEO) satellites provide global coverage broadband connectivity. However, the limited frequency band coexistence of multiple constellations bring new challenges for interference management. In this paper, we propose a robust multilayer management scheme spectrum sharing heterogeneous satellite networks with statistical Channel State Information (CSI) at Transmitter (CSIT) Receivers (CSIR)....

This paper studies the beamforming design problem to achieve max-min fairness (MMF) in multibeam satellite communications. Contrary conventional linear precoding (NoRS) that relies on fully treating any residual interference as noise, we consider a novel multicast strategy based Rate-Splitting Multiple Access (RSMA). RSMA linearly precoded ratesplitting (RS) at transmitter and Successive Interference Cancellation (SIC) receivers enable flexible framework for non-orthogonal transmission...

Energy efficiency (EE) problem has become an important and major issue in satellite communications. In this paper, we study the beamforming design strategy to maximize EE of rate-splitting multiple access (RSMA) for multibeam communications by considering imperfect channel state information at transmitter (CSIT). We propose expectation-based robust algorithm against CSIT scenario. By combining successive convex approximation (SCA) with penalty function transformation, nonconvex maximization...

Rate-splitting multiple access (RSMA) is a promising technique for downlink multi-antenna communications owning to its capability of enhancing the system performance in wide range network loads, user deployments and channel state information at transmitter (CSIT) inaccuracies. In this paper, we investigate achievable rate RSMA multi-user multiple-input single-output (MU-MISO) where only slow-varying statistical (CSI) available transmitter. RSMA-based beamforming split common stream optimized...

In this paper, we initiate the study of rate-splitting multiple access (RSMA) for a mono-static integrated sensing and communication (ISAC) system, where dual-functional base station (BS) simultaneously communicates with users detects moving targets. We aim at optimizing ISAC waveform to jointly maximize max-min fairness (MMF) rate minimize largest eigenvalue Cram\'er-Rao bound (CRB) matrix unbiased estimation. The CRB considered in work is general as it involves estimation angular...

Future wireless networks, in particular, 5G and beyond, are anticipated to deploy dense Low Earth Orbit (LEO) satellites provide global coverage broadband connectivity. However, the limited frequency band coexistence of multiple constellations bring new challenges for interference management. In this paper, we propose a robust multilayer management scheme spectrum sharing heterogeneous satellite networks with statistical channel state information (CSI) at transmitter (CSIT) receivers (CSIR)....

Rate-splitting multiple access (RSMA) is an emerging technique for multi-antenna networks that splits messages into common and private parts flexible interference mitigation. Motivated by its robustness scalability, it promising to employ RSMA in integrated satellite-terrestrial (ISTN), where a satellite serves users (SUs) broadly with multibeam multicast transmission while terrestrial base station (BS) cellular (CUs) unicast transmission, operating the same frequency band. To avoid data...

Rate-splitting multiple access (RSMA) is a novel technique that breaks messages into common and private parts to mitigate interference in flexible manner. Motivated by its robustness, RSMA promising multibeam satellite systems, where broadly serves terrestrial users through multicast transmission with full frequency reuse among all spot beams. In the system, there are heterogeneous traffic demands To meet different requirements for beams, we present RSMA-enabled rate-matching framework...

This work focuses on the promising Rate-Splitting Multiple Access (RSMA) and its beamforming design problem to achieve max-min fairness (MMF) among multiple co-channel multicast groups with imperfect channel state information at transmitter (CSIT). Contrary conventional linear precoding (NoRS) that relies fully treating any residual interference as noise, we consider a novel multigroup strategy based RSMA. RSMA linearly precoded (RS) Successive Interference Cancellation (SIC) receivers, has...