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
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 MasourosDual-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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IEEE Open Journal of the Communications SocietyISSN
2644-125XPublisher
IEEEExternal DOI
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3Page range
986-1006Department affiliated with
- Engineering and Design Publications
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© 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
2022-06-06First Open Access (FOA) Date
2022-06-06First Compliant Deposit (FCD) Date
2022-06-06Usage metrics
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