Range–angle-decoupled beampattern synthesis with subarray-based frequency diverse array
The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degr...
Ausführliche Beschreibung
Autor*in: |
Xu, Yanhong [verfasserIn] |
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E-Artikel |
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Sprache: |
Englisch |
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2017transfer abstract |
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11 |
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Übergeordnetes Werk: |
Enthalten in: Modelling SARS-CoV-2 transmission in a UK university setting - Hill, Edward M. ELSEVIER, 2021, a review journal, Orlando, Fla |
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Übergeordnetes Werk: |
volume:64 ; year:2017 ; pages:49-59 ; extent:11 |
Links: |
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DOI / URN: |
10.1016/j.dsp.2017.02.005 |
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ELV036057991 |
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520 | |a The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. | ||
520 | |a The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. | ||
650 | 7 | |a Range–angle-decoupled |2 Elsevier | |
650 | 7 | |a Multiple subarrays |2 Elsevier | |
650 | 7 | |a Frequency diverse array |2 Elsevier | |
650 | 7 | |a Beampattern synthesis |2 Elsevier | |
650 | 7 | |a Range and angle domains |2 Elsevier | |
700 | 1 | |a Shi, Xiaowei |4 oth | |
700 | 1 | |a Xu, Jingwei |4 oth | |
700 | 1 | |a Huang, Lei |4 oth | |
700 | 1 | |a Li, Wentao |4 oth | |
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10.1016/j.dsp.2017.02.005 doi GBVA2017017000019.pica (DE-627)ELV036057991 (ELSEVIER)S1051-2004(17)30029-5 DE-627 ger DE-627 rakwb eng 620 620 DE-600 610 VZ 44.75 bkl Xu, Yanhong verfasserin aut Range–angle-decoupled beampattern synthesis with subarray-based frequency diverse array 2017transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. Range–angle-decoupled Elsevier Multiple subarrays Elsevier Frequency diverse array Elsevier Beampattern synthesis Elsevier Range and angle domains Elsevier Shi, Xiaowei oth Xu, Jingwei oth Huang, Lei oth Li, Wentao oth Enthalten in Academic Press Hill, Edward M. ELSEVIER Modelling SARS-CoV-2 transmission in a UK university setting 2021 a review journal Orlando, Fla (DE-627)ELV006540295 volume:64 year:2017 pages:49-59 extent:11 https://doi.org/10.1016/j.dsp.2017.02.005 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.75 Infektionskrankheiten parasitäre Krankheiten Medizin VZ AR 64 2017 49-59 11 045F 620 |
spelling |
10.1016/j.dsp.2017.02.005 doi GBVA2017017000019.pica (DE-627)ELV036057991 (ELSEVIER)S1051-2004(17)30029-5 DE-627 ger DE-627 rakwb eng 620 620 DE-600 610 VZ 44.75 bkl Xu, Yanhong verfasserin aut Range–angle-decoupled beampattern synthesis with subarray-based frequency diverse array 2017transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. Range–angle-decoupled Elsevier Multiple subarrays Elsevier Frequency diverse array Elsevier Beampattern synthesis Elsevier Range and angle domains Elsevier Shi, Xiaowei oth Xu, Jingwei oth Huang, Lei oth Li, Wentao oth Enthalten in Academic Press Hill, Edward M. ELSEVIER Modelling SARS-CoV-2 transmission in a UK university setting 2021 a review journal Orlando, Fla (DE-627)ELV006540295 volume:64 year:2017 pages:49-59 extent:11 https://doi.org/10.1016/j.dsp.2017.02.005 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.75 Infektionskrankheiten parasitäre Krankheiten Medizin VZ AR 64 2017 49-59 11 045F 620 |
allfields_unstemmed |
10.1016/j.dsp.2017.02.005 doi GBVA2017017000019.pica (DE-627)ELV036057991 (ELSEVIER)S1051-2004(17)30029-5 DE-627 ger DE-627 rakwb eng 620 620 DE-600 610 VZ 44.75 bkl Xu, Yanhong verfasserin aut Range–angle-decoupled beampattern synthesis with subarray-based frequency diverse array 2017transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. Range–angle-decoupled Elsevier Multiple subarrays Elsevier Frequency diverse array Elsevier Beampattern synthesis Elsevier Range and angle domains Elsevier Shi, Xiaowei oth Xu, Jingwei oth Huang, Lei oth Li, Wentao oth Enthalten in Academic Press Hill, Edward M. ELSEVIER Modelling SARS-CoV-2 transmission in a UK university setting 2021 a review journal Orlando, Fla (DE-627)ELV006540295 volume:64 year:2017 pages:49-59 extent:11 https://doi.org/10.1016/j.dsp.2017.02.005 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.75 Infektionskrankheiten parasitäre Krankheiten Medizin VZ AR 64 2017 49-59 11 045F 620 |
allfieldsGer |
10.1016/j.dsp.2017.02.005 doi GBVA2017017000019.pica (DE-627)ELV036057991 (ELSEVIER)S1051-2004(17)30029-5 DE-627 ger DE-627 rakwb eng 620 620 DE-600 610 VZ 44.75 bkl Xu, Yanhong verfasserin aut Range–angle-decoupled beampattern synthesis with subarray-based frequency diverse array 2017transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. Range–angle-decoupled Elsevier Multiple subarrays Elsevier Frequency diverse array Elsevier Beampattern synthesis Elsevier Range and angle domains Elsevier Shi, Xiaowei oth Xu, Jingwei oth Huang, Lei oth Li, Wentao oth Enthalten in Academic Press Hill, Edward M. ELSEVIER Modelling SARS-CoV-2 transmission in a UK university setting 2021 a review journal Orlando, Fla (DE-627)ELV006540295 volume:64 year:2017 pages:49-59 extent:11 https://doi.org/10.1016/j.dsp.2017.02.005 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.75 Infektionskrankheiten parasitäre Krankheiten Medizin VZ AR 64 2017 49-59 11 045F 620 |
allfieldsSound |
10.1016/j.dsp.2017.02.005 doi GBVA2017017000019.pica (DE-627)ELV036057991 (ELSEVIER)S1051-2004(17)30029-5 DE-627 ger DE-627 rakwb eng 620 620 DE-600 610 VZ 44.75 bkl Xu, Yanhong verfasserin aut Range–angle-decoupled beampattern synthesis with subarray-based frequency diverse array 2017transfer abstract 11 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. Range–angle-decoupled Elsevier Multiple subarrays Elsevier Frequency diverse array Elsevier Beampattern synthesis Elsevier Range and angle domains Elsevier Shi, Xiaowei oth Xu, Jingwei oth Huang, Lei oth Li, Wentao oth Enthalten in Academic Press Hill, Edward M. ELSEVIER Modelling SARS-CoV-2 transmission in a UK university setting 2021 a review journal Orlando, Fla (DE-627)ELV006540295 volume:64 year:2017 pages:49-59 extent:11 https://doi.org/10.1016/j.dsp.2017.02.005 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA 44.75 Infektionskrankheiten parasitäre Krankheiten Medizin VZ AR 64 2017 49-59 11 045F 620 |
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Range–angle-decoupled beampattern synthesis with subarray-based frequency diverse array |
abstract |
The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. |
abstractGer |
The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. |
abstract_unstemmed |
The beam steering of conventional phased array (PA) is fixed in one direction, thus its beampattern synthesis can only be performed in angle domain. Compared with the conventional PA, frequency diverse array (FDA), which applies an additional frequency shift across the array aperture, possesses degrees-of-freedom (DOFs) in not only angle domain but also range domain, thus providing great superiority and many potential applications. However, the range and angle information of the FDA cannot be exclusively determined at the output of the array due to the fact that its beam steering is coupled in range and angle domains. In this paper, we firstly propose a subarray-based FDA framework to obtain the range–angle-decoupled beampattern. Specifically, the array is divided into multiple non-overlapped subarrays with different frequency shifts and these subarrays with non-zero frequency shifts exist in pairs. With the devised subarray-based FDA framework, the DOFs in both range and angle domains can be obtained simultaneously. On this basis, a novel beampattern synthesis method based on semidefinite relaxation (SDR) is proposed to focus the transmit energy in the desired range–angle region. The aim of the constructed constrained optimization problem is to find an optimal transmit weight matrix such that the true transmit beampattern best approximates a desired beampattern. Numerical simulations are implemented to demonstrate the effectiveness of the proposed range–angle-decoupled beampattern synthesis approach. |
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Range–angle-decoupled beampattern synthesis with subarray-based frequency diverse array |
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