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Energy_Efficient_Dual-Functional_Radar-Communication_Rate-Splitting_Multiple_Access_Low-Resolution_DACs_and_RF_Chain_Selection.pdf (1.34 MB)

Energy efficient dual-functional radar-communication: rate-splitting multiple access, low-resolution DACs, and RF chain selection

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Version 2 2023-06-12, 07:42
Version 1 2023-06-10, 02:45
journal contribution
posted on 2023-06-12, 07:42 authored by Onur Dizdar, Aryan KaushikAryan Kaushik, Bruno Clerckx, Christos Masouros
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 DualFunctional 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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Publication status

  • Published

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  • Published version

Journal

IEEE Open Journal of the Communications Society

ISSN

2644-125X

Publisher

IEEE

Volume

3

Page range

986-1006

Department affiliated with

  • Engineering and Design Publications

Notes

© 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2022-06-06

First Open Access (FOA) Date

2022-06-06

First Compliant Deposit (FCD) Date

2022-06-06

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