Joint Optimization Scheme for Subcarrier Selection and Power Allocation in Multicarrier Dual-Function Radar-Communication System

Dual-function radar-communications (DFRC) system has been recognized as a promising solution to alleviate the radio frequency spectrum congestion and the shortage of spectrum resources. In this article, we address the problem of designing the joint subcarrier selection and power allocation scheme to...

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Veröffentlicht in:	IEEE systems journal Jg. 15; H. 1; S. 947 - 958
Hauptverfasser:	Shi, Chenguang, Wang, Yijie, Wang, Fei, Salous, Sana, Zhou, Jianjiang
Format:	Journal Article
Sprache:	Englisch
Veröffentlicht:	New York IEEE 01.03.2021 The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:	Algorithms Communications systems Cyclic minimization algorithm (CMA) Frequency spectrum joint subcarrier selection and power allocation Karush–Kuhn–Tuckers (KKT) optimality conditions multicarrier dual-function radar-communications (DFRC) system OFDM Optimization Power consumption Power demand power-saving performance Radar Resource management Subcarriers System performance Wireless communication
ISSN:	1932-8184, 1937-9234
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Abstract	Dual-function radar-communications (DFRC) system has been recognized as a promising solution to alleviate the radio frequency spectrum congestion and the shortage of spectrum resources. In this article, we address the problem of designing the joint subcarrier selection and power allocation scheme to minimize the power consumption of a DFRC system, under a general scenario in which the DFRC system is capable of performing a primary radar purpose and a secondary communications purpose in the meantime. In particular, the key mechanism is to minimize the total radiated power of the multicarrier DFRC system by jointly selecting the best possible subcarriers for radar and communications purposes in sequence and allocating the optimal power resource on the corresponding subcarriers, under the constraints of a predefined mutual information for target characterization and a desired communications data rate for information transmission. The resulting problem is formulated as a two-variable nonconvex optimization problem, one for subcarrier selection and the other for power allocation. Then, after convex relaxation reformulation and problem partition, an efficient three-step solution technique is developed for the joint optimization scheme, which combines the cyclic minimization algorithm and Karush-Kuhn-Tuckers optimality conditions. Finally, numerical results are provided to validate the theoretical findings and to verify the effectiveness of the proposed joint optimization scheme.
AbstractList	Dual-function radar-communications (DFRC) system has been recognized as a promising solution to alleviate the radio frequency spectrum congestion and the shortage of spectrum resources. In this article, we address the problem of designing the joint subcarrier selection and power allocation scheme to minimize the power consumption of a DFRC system, under a general scenario in which the DFRC system is capable of performing a primary radar purpose and a secondary communications purpose in the meantime. In particular, the key mechanism is to minimize the total radiated power of the multicarrier DFRC system by jointly selecting the best possible subcarriers for radar and communications purposes in sequence and allocating the optimal power resource on the corresponding subcarriers, under the constraints of a predefined mutual information for target characterization and a desired communications data rate for information transmission. The resulting problem is formulated as a two-variable nonconvex optimization problem, one for subcarrier selection and the other for power allocation. Then, after convex relaxation reformulation and problem partition, an efficient three-step solution technique is developed for the joint optimization scheme, which combines the cyclic minimization algorithm and Karush-Kuhn-Tuckers optimality conditions. Finally, numerical results are provided to validate the theoretical findings and to verify the effectiveness of the proposed joint optimization scheme.
Author	Zhou, Jianjiang Salous, Sana Shi, Chenguang Wang, Fei Wang, Yijie
Author_xml	– sequence: 1 givenname: Chenguang orcidid: 0000-0002-2507-2954 surname: Shi fullname: Shi, Chenguang email: scg_space@163.com organization: Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing, China – sequence: 2 givenname: Yijie orcidid: 0000-0002-8787-0433 surname: Wang fullname: Wang, Yijie email: wyj751953@163.com organization: Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing, China – sequence: 3 givenname: Fei orcidid: 0000-0001-8633-5829 surname: Wang fullname: Wang, Fei email: wangxiaoxian@nuaa.edu.cn organization: Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing, China – sequence: 4 givenname: Sana orcidid: 0000-0002-4227-9893 surname: Salous fullname: Salous, Sana email: sana.salous@durham.ac.uk organization: School of Engineering and Computing Sciences, Durham University, Durham, U.K – sequence: 5 givenname: Jianjiang surname: Zhou fullname: Zhou, Jianjiang email: zjjee@nuaa.edu.cn organization: Key Laboratory of Radar Imaging and Microwave Photonics, Ministry of Education, Nanjing University of Aeronautics and Astronautics, Nanjing, China
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Snippet	Dual-function radar-communications (DFRC) system has been recognized as a promising solution to alleviate the radio frequency spectrum congestion and the...
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SubjectTerms	Algorithms Communications systems Cyclic minimization algorithm (CMA) Frequency spectrum joint subcarrier selection and power allocation Karush–Kuhn–Tuckers (KKT) optimality conditions multicarrier dual-function radar-communications (DFRC) system OFDM Optimization Power consumption Power demand power-saving performance Radar Resource management Subcarriers System performance Wireless communication
Title	Joint Optimization Scheme for Subcarrier Selection and Power Allocation in Multicarrier Dual-Function Radar-Communication System
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