Rate-Splitting Multiple Access for Multi-Antenna Joint Radar and Communications

Xu, Chengcheng; Clerckx, Bruno; Chen, Shiwa; Mao, Yijie; Zhang, Jianyun

doi:10.1109/jstsp.2021.3110312

Cited by 94 publications

(46 citation statements)

References 31 publications

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“…Inspired by the formidable interference management capability of RSMA, an RSMA-aided dual-functional radarcommunication (DFRC) transmission framework was first proposed in [117], [197] considering one multi-antenna transmitter simultaneously detecting radar targets and serving multiple communication users based on 1-layer RS. By designing the precoders to simultaneously maximize the WSR of the communication users and minimize the MSE for radar beampattern approximation, RSMA improves the tradeoff between WSR and MSE compared to conventional SDMAbased DFRC.…”

Section: ) Simultaneous Wireless Information and Power Transfer (Swipt)mentioning

confidence: 99%

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Rate-Splitting Multiple Access: Fundamentals, Survey, and Future Research Trends

Mao,

Dizdar,

Clerckx

et al. 2022

Preprint

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Rate-splitting multiple access (RSMA) has emerged as a novel, general, and powerful framework for the design and optimization of non-orthogonal transmission, multiple access (MA), and interference management strategies for future wireless networks. By exploiting splitting of user messages as well as non-orthogonal transmission of common messages decoded by multiple users and private messages decoded by their corresponding users, RSMA can softly bridge and therefore reconcile the two extreme interference management strategies of fully decoding interference and treating interference as noise. RSMA has been shown to generalize and subsume as special cases four existing MA schemes, namely, orthogonal multiple access (OMA), physical-layer multicasting, space division multiple access (SDMA) based on linear precoding (currently used in the fifth generation wireless network-5G), and non-orthogonal multiple access (NOMA) based on linearly precoded superposition coding with successive interference cancellation (SIC). Through information and communication theoretic analysis, RSMA has been shown to be optimal (from a Degrees-of-Freedom region perspective) in several transmission scenarios. Compared to the conventional MA strategies used in 5G, RSMA enables spectral efficiency (SE), energy efficiency (EE), coverage, user fairness, reliability, and quality of service (QoS) enhancements for a wide range of network loads (including both underloaded and overloaded regimes) and user channel conditions. Furthermore, it enjoys a higher robustness against imperfect channel state information at the transmitter (CSIT) and entails lower feedback overhead and complexity. Despite its great potential to fundamentally change the physical (PHY) layer and media access control (MAC) layer of wireless communication networks, RSMA is still confronted with many challenges on the road towards standardization. In this paper, we present the first comprehensive tutorial on RSMA by providing a survey of the pertinent state-ofthe-art research, detailing its architecture, taxonomy, and various appealing applications, as well as comparing with existing MA schemes in terms of their overall frameworks, performance, and complexities. An in-depth discussion of future RSMA research challenges is also provided to inspire future research on RSMAaided wireless communication for beyond 5G systems.

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Section: ) Simultaneous Wireless Information and Power Transfer (Swipt)mentioning

confidence: 99%

“…• Intelligent reconfigurable surface (IRS) [126], [127], [134]. • Joint communication and radar [117], [139], [140].…”

Section: B Rsma In Multi-antenna Networkmentioning

confidence: 99%

Rate-Splitting Multiple Access: Fundamentals, Survey, and Future Research Trends

Mao,

Dizdar,

Clerckx

et al. 2022

Preprint

Self Cite

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“…Recent works [35], [36] have tackled the interference management problem in MIMO DFRC systems by employing RSMA, however, without any considerations for EE or interference due to imperfect CSIT. In [37], [38], the authors deal with the sum-rate maximization of a DFRC system employing RSMA under imperfect CSIT, without considering the EE performance, low-resolution DACs or the problem of RF chain selection.…”

Section: A Literature Reviewmentioning

confidence: 99%

“…First, we write an equivalent problem as in (36), with C ′ l = ln 2C l . Then, we introduce the slack variables ω k,l and ν k,l and rewrite the constraint (36c) in 3 new constraints as…”

Section: Proposed Sca/sdr-based Algorithm For Optimal Rf Chain Selectionmentioning

confidence: 99%

“…Next, we describe the modifications for the RF chain selection procedure. The use of R(M) c,k,l (P l , Λ, B) and R(M) c,k,l (P l , Λ, B) in the formulation (30) averages of the logarithmic terms in the formulation (36), which respectively translate the constraints (42b), (42c), (41d), (40a), (40b), (37c), (44) in (48) to the ones given below:…”

Section: Formulation Under Imperfect Csitmentioning

confidence: 99%

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Energy Efficient Dual-Functional Radar-Communication: Rate-Splitting Multiple Access, Low-Resolution DACs, and RF Chain Selection

Dizdar¹,

Kaushik²,

Clerckx³

et al. 2022

Preprint

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Dual-Functional Radar-Communication systems enhance the benefits of communications and radar sensing by jointly implementing these on the same hardware platform and using the common RF resources. An important and latest concern to be addressed in designing such Dual-Functional Radar-Communication systems is maximizing the energy-efficiency. In this paper, we consider a Dual-Functional Radar-Communication system performing simultaneous multi-user communications and radar sensing, and investigate the energy-efficiency behaviour with respect to active transmission elements. Specifically, we formulate a problem to find the optimal precoders and the number of active RF chains for maximum energy-efficiency by taking into consideration the power consumption of low-resolution Digital-to-Analog Converters on each RF chain under communications and radar performance constraints. We consider Rate-Splitting Multiple Access to perform multi-user communications with perfect and imperfect Channel State Information at Transmitter. The formulated non-convex optimization problem is solved by means of a novel algorithm. We demonstrate by numerical results that Rate Splitting Multiple Access achieves an improved energy-efficiency by employing a smaller number of RF chains compared to Space Division Multiple Access, owing to its generalized structure and improved interference management capabilities.

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Joint Radar and Communication Empowered by Digital Programmable Metasurface

Wan

Huang

Wang

et al. 2022

Advanced Intelligent Systems

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Digital programmable metasurfaces (DPMs) can dynamically modulate electromagnetic waves in space, time, and frequency domains with powerful capabilities. In contrast, joint radar and communication (JRC) is an important avenue to use the electromagnetic waves universally and intelligently. Hence, combining DPM and JRC may produce a promising way to achieve universal and intelligent electromagnetic terminals. Herein, a mechanism of extremely flexible JRC based on DPM is proposed, in which DPM can improve the flexibility of JRC in processing multidimensional information, and JRC endows DPM with the capabilities of perception, expression, and cognition to promote its intelligent level. Three kinds of functions are explored to interpret the mechanism. First, encryption and decryption of wireless secure communications are realized through DPM; second, range profile imaging is accomplished by using DPM‐based biphase‐coded signals; and third, wireless communication and radar detection are simultaneously presented using DPM. The combination of DPM and JRC greatly decreases the complexity of signal processing and simplifies the architecture of the JRC system, and promotes the intelligent level of DPM.

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Rate-Splitting Multiple Access for Multi-Antenna Joint Radar and Communications

Cited by 94 publications

References 31 publications

Rate-Splitting Multiple Access: Fundamentals, Survey, and Future Research Trends

Rate-Splitting Multiple Access: Fundamentals, Survey, and Future Research Trends

Energy Efficient Dual-Functional Radar-Communication: Rate-Splitting Multiple Access, Low-Resolution DACs, and RF Chain Selection

Joint Radar and Communication Empowered by Digital Programmable Metasurface

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