Integrated Sensing and Communication Beamforming Design Based on Mutual Information

Integrated sensing and communication (ISAC) unifies radar sensing and communication, and improves the efficiency of the spectrum, energy and hardware. In this paper, we investigate the ISAC beamforming design in a downlink system with a communication user and a point radar target to be perceived. Th...

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Bibliographic Details
Published inIEEE/CIC International Conference on Communications in China - Workshops (Online) pp. 383 - 388
Main Authors Li, Jin, Liu, Nan
Format Conference Proceeding
LanguageEnglish
Published IEEE 11.08.2022
Subjects
Array signal processing
beam-forming
Closed-form solutions
Downlink
Hardware
Integrated sensing and communication
Interference
Measurement
mutual information
Radar
semidefinite relaxation
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ISSN2474-9133
DOI10.1109/ICCCWorkshops55477.2022.9896665

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Summary:Integrated sensing and communication (ISAC) unifies radar sensing and communication, and improves the efficiency of the spectrum, energy and hardware. In this paper, we investigate the ISAC beamforming design in a downlink system with a communication user and a point radar target to be perceived. The design criterion for radar sensing is the mutual information between the target response matrix and the echo signals, while the single user transmission rate is used as the performance metric of the communication. Two scenarios without and with interference from the communication user are investigated. A closed-form solution with low complexity and a solution based on the semidefinite relaxation (SDR) method are provided to solve these two problems, respectively. Numerical results demonstrate that, compared to the results obtained by SDR based on the CVX toolbox, the closed-form solution is tight in the feasible region. In addition, we show that the SDR method obtains an optimal solution.
ISSN:2474-9133
DOI:10.1109/ICCCWorkshops55477.2022.9896665