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

Dizdar, Onur; Kaushik, Aryan; Clerckx, Bruno; Masouros, Christos

doi:10.48550/arxiv.2202.09128

Cited by 2 publications

(3 citation statements)

References 38 publications

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“…In the scope of this paper, we present optimal RF selection mechanism with hardware impairments and interference terms taken into account, similar fractional programingbased RF chain selection procedures can also be extended with DAC-bit selection in JRC systems such as in Ref. [43].…”

Section: Simulation Resultsmentioning

confidence: 99%

Towards 6G: Spectrally efficient joint radar and communication with radio frequency selection, interference and hardware impairments (invited paper)

Kaushik

Vlachos

Thompson

et al. 2022

IET Signal Processing

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The joint radar‐communication (JRC) system is envisioned as an emerging sixth generation (6G) technology to tackle spectral congestion and hardware limitations by jointly implementing the communication and radar sensing on the same hardware platform and using the common radio frequency (RF) resources. Joint radar‐communication systems with a multi‐antenna setup leads to higher degrees of freedom, and hybrid beamforming can be exploited to achieve lower hardware complexity than conventional fully digital systems. This paper aims to design a spectral efficiency maximisation approach for a 6G inclined JRC system with hybrid beamforming and multi‐antenna setup while considering the interference between communication and radar operations and hardware impairments in the system. The rate expressions for communication and radar operations are defined, and the joint spectral efficiency is maximised via optimising the number of RF chains using an efficient selection algorithm taking into account the interference of one operation to the other and system hardware distortion. The simulation results are shown to support the effectiveness of the proposed approach, and they are compared with that of existing fully digital and hybrid beamforming based baseline methods with fixed number of RF chains. The proposed approach also exhibits a desirable communication‐radar trade‐off in terms of spectral efficiency gains.

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Section: Simulation Resultsmentioning

confidence: 99%

Towards 6G: Spectrally efficient joint radar and communication with radio frequency selection, interference and hardware impairments (invited paper)

Kaushik

Vlachos

Thompson

et al. 2022

IET Signal Processing

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“…Inspired by the appealing advantages of RSMA in multiantenna systems, the benefits of introducing RSMA and HAD to tackle the MUI in the context of mmWave massive MIMO communications were demonstrated in [18], [19]. As a consequence, the interplay between RSMA-assisted ISAC and mmWave massive MIMO is becoming another interesting research topic [10].…”

Section: A Rsma-assisted Isac With Mmwave Massive Mimomentioning

confidence: 99%

“…[9] investigated the RSMA-assisted ISAC satellite system, which facilitates the integration of communications and moving target sensing in space networks. The design of RSMA-assisted ISAC with low resolution digital-to-analog converter (DAC) units was introduced in [10], where RSMA was shown to achieve an improved energy-efficiency by employing a smaller number of RF chains, owing to its generalized structure and improved interference management capabilities.…”

Section: Introductionmentioning

confidence: 99%

Rate-Splitting Multiple Access for 6G -- Part II: Interplay with Integrated Sensing and Communications

Li¹,

Mao²,

Dizdar³

et al. 2022

Preprint

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This letter is the second part of a three-part tutorial focusing on rate-splitting multiple access (RSMA) for 6G. As Part II of the tutorial, this letter addresses the interplay between RSMA and integrated radar sensing and communications (ISAC). In particular, we introduce a general RSMAassisted ISAC architecture, where the ISAC platform has a dual capability to simultaneously communicate with downlink users and probe detection signals to a moving target. Then, the metrics of radar sensing and communications are respectively introduced, followed by a RSMA-assisted ISAC waveform design example which jointly minimizes the Cramér-Rao bound (CRB) of target estimation and maximizes the minimum fairness rate (MFR) amongst communication users subject to the per-antenna power constraint. The superiority of RSMA-assisted ISAC is verified through simulation results in both terrestrial and satellite scenarios. RSMA is demonstrated to be a powerful multiple access and interference management strategy for ISAC, and provides a better communication-sensing trade-off compared with the conventional benchmark strategies. Consequently, RSMA is a promising technology for next generation multiple access (NGMA) and future networks such as 6G and beyond.

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

Cited by 2 publications

References 38 publications

Towards 6G: Spectrally efficient joint radar and communication with radio frequency selection, interference and hardware impairments (invited paper)

Towards 6G: Spectrally efficient joint radar and communication with radio frequency selection, interference and hardware impairments (invited paper)

Rate-Splitting Multiple Access for 6G -- Part II: Interplay with Integrated Sensing and Communications

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