Efficient Transceiving Search Scheme and Implementation Method for Collocated Distributed Coherent Aperture Radar via Grating Lobes Exploitation
Distributed coherent aperture radar (DCAR) can realize high-precision long-range detection because of its excellent angular resolution. However, it is accompanied by a low search efficiency problem caused by the narrow main lobe and the angular ambiguity problem stemming from the high grating lobes....
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/15/9/2262 |
| _version_ | 1797601823347965952 |
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| author | Liubo Hu Jianxin Wu Lei Zhang |
| author_facet | Liubo Hu Jianxin Wu Lei Zhang |
| author_sort | Liubo Hu |
| collection | DOAJ |
| description | Distributed coherent aperture radar (DCAR) can realize high-precision long-range detection because of its excellent angular resolution. However, it is accompanied by a low search efficiency problem caused by the narrow main lobe and the angular ambiguity problem stemming from the high grating lobes. By simultaneously utilizing multiple grating lobes, we propose an effective search method and pertinent unambiguous signal processing algorithms to address the issue of using collocated DCAR for unambiguous target search. We investigate the beam migration of a grating lobe-irradiated target at various frequencies in order to carry out the multi-frequency coherent integration of the suggested search method in DCAR. In order to address the issue of using multiple beam lobes to simultaneously detect multiple targets, we also take into account the scenario of multiple targets and introduce the multiple hypothesis method to solve the problem. The DCAR search efficiency can be improved by tens of times through grating lobes exploitation, which makes use of DCAR to make the searches feasible. We also improved the performance of multi-frequency DOA ambiguity solving compared to existing algorithms with the sliding window clustering scheme. The viability of using grating lobes for the DCAR target searching and detection is shown in simulations. The experiments confirm the performance enhancement of multi-frequency coherent integration for parameter estimation. |
| first_indexed | 2024-03-11T04:08:08Z |
| format | Article |
| id | doaj.art-9394a21cf7294fbe846e326f7d100a16 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-11T04:08:08Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-9394a21cf7294fbe846e326f7d100a162023-11-17T23:37:44ZengMDPI AGRemote Sensing2072-42922023-04-01159226210.3390/rs15092262Efficient Transceiving Search Scheme and Implementation Method for Collocated Distributed Coherent Aperture Radar via Grating Lobes ExploitationLiubo Hu0Jianxin Wu1Lei Zhang2School of Electronics and Communication Engineering, Sun Yat-sen University, No. 66, Gongchang Road, Guangming District, Shenzhen 518107, ChinaSchool of Electronics and Communication Engineering, Sun Yat-sen University, No. 66, Gongchang Road, Guangming District, Shenzhen 518107, ChinaSchool of Electronics and Communication Engineering, Sun Yat-sen University, No. 66, Gongchang Road, Guangming District, Shenzhen 518107, ChinaDistributed coherent aperture radar (DCAR) can realize high-precision long-range detection because of its excellent angular resolution. However, it is accompanied by a low search efficiency problem caused by the narrow main lobe and the angular ambiguity problem stemming from the high grating lobes. By simultaneously utilizing multiple grating lobes, we propose an effective search method and pertinent unambiguous signal processing algorithms to address the issue of using collocated DCAR for unambiguous target search. We investigate the beam migration of a grating lobe-irradiated target at various frequencies in order to carry out the multi-frequency coherent integration of the suggested search method in DCAR. In order to address the issue of using multiple beam lobes to simultaneously detect multiple targets, we also take into account the scenario of multiple targets and introduce the multiple hypothesis method to solve the problem. The DCAR search efficiency can be improved by tens of times through grating lobes exploitation, which makes use of DCAR to make the searches feasible. We also improved the performance of multi-frequency DOA ambiguity solving compared to existing algorithms with the sliding window clustering scheme. The viability of using grating lobes for the DCAR target searching and detection is shown in simulations. The experiments confirm the performance enhancement of multi-frequency coherent integration for parameter estimation.https://www.mdpi.com/2072-4292/15/9/2262distributed aperture radargrating lobe exploitationcoherent integrationsearching efficiencyangle ambiguity |
| spellingShingle | Liubo Hu Jianxin Wu Lei Zhang Efficient Transceiving Search Scheme and Implementation Method for Collocated Distributed Coherent Aperture Radar via Grating Lobes Exploitation Remote Sensing distributed aperture radar grating lobe exploitation coherent integration searching efficiency angle ambiguity |
| title | Efficient Transceiving Search Scheme and Implementation Method for Collocated Distributed Coherent Aperture Radar via Grating Lobes Exploitation |
| title_full | Efficient Transceiving Search Scheme and Implementation Method for Collocated Distributed Coherent Aperture Radar via Grating Lobes Exploitation |
| title_fullStr | Efficient Transceiving Search Scheme and Implementation Method for Collocated Distributed Coherent Aperture Radar via Grating Lobes Exploitation |
| title_full_unstemmed | Efficient Transceiving Search Scheme and Implementation Method for Collocated Distributed Coherent Aperture Radar via Grating Lobes Exploitation |
| title_short | Efficient Transceiving Search Scheme and Implementation Method for Collocated Distributed Coherent Aperture Radar via Grating Lobes Exploitation |
| title_sort | efficient transceiving search scheme and implementation method for collocated distributed coherent aperture radar via grating lobes exploitation |
| topic | distributed aperture radar grating lobe exploitation coherent integration searching efficiency angle ambiguity |
| url | https://www.mdpi.com/2072-4292/15/9/2262 |
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