Green joint radar-communications: RF selection with low resolution DACs and hybrid precoding

Kaushik, Aryan, Vlachos, Evangelos, Masouros, Christos, Tsinos, Christos and Thompson, John (2022) Green joint radar-communications: RF selection with low resolution DACs and hybrid precoding. 2022 IEEE International Conference on Communications (ICC), Seoul, South Korea, 16–20 May 2022. Published in: IEEE International Conference on Communications (ICC). IEEE Xplore (Accepted)

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This paper considers a multiple-input multiple-output (MIMO) joint radar-communication (JRC) transmission with hybrid precoding and low resolution digital to analog converters (DACs). An energy efficient radio frequency (RF) chain and DAC bit selection approach is presented for a subarrayed hybrid MIMO JRC system. We introduce a weighting formulation to represent the combined radar-communications information rate. The presented selection mechanism is incorporated with fractional programming to solve an energy efficiency maximization problem for JRC which selects the optimal number of RF chains and DAC bit resolution. Subsequently, a weighted minimization problem to compute the precoding matrices is formulated, which is solved using an alternating minimization approach. The numerical results show the effectiveness of the proposed method in terms of high energy efficiency whilst maintaining good rate and desirable radar beampattern performance.

Item Type: Conference Proceedings
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Schools and Departments: School of Engineering and Informatics > Engineering and Design
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Date Deposited: 19 Jan 2022 10:10
Last Modified: 19 Jan 2022 10:10

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