Simultaneous Correlative Interferometer Technique for Direction Finding of Signal Sources
In this paper, we propose a novel simultaneous Correlative Interferometer (CI) technique that elaborately estimates the Direction of Arrival (DOA) of multiple source signals incident on an antenna array. The basic idea of the proposed technique is that the antenna-array-based receiver compares the p...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/21/8938 |
| _version_ | 1797631278379433984 |
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| author | Minkyu Oh Young-Seok Lee In-Ki Lee Bang Chul Jung |
| author_facet | Minkyu Oh Young-Seok Lee In-Ki Lee Bang Chul Jung |
| author_sort | Minkyu Oh |
| collection | DOAJ |
| description | In this paper, we propose a novel simultaneous Correlative Interferometer (CI) technique that elaborately estimates the Direction of Arrival (DOA) of multiple source signals incident on an antenna array. The basic idea of the proposed technique is that the antenna-array-based receiver compares the phase of the received signal with one of the candidates at each time sample and jointly exploits these multiple time samples to estimate the DOAs of multiple signal sources. The proposed simultaneous CI-based DOA estimation technique collectively utilizes multiple time-domain samples and can be regarded as a generalized version of the conventional CI algorithm for the case of multiple time-domain samples. We first thoroughly review the conventional CI algorithm to comprehensively explain the procedure of the direction-finding algorithm that adopts the phase information of received signals. We also discuss several technical issues of conventional CI-based DOA estimation techniques that are originally proposed for the case of a single time-domain sample. Then, we propose a simultaneous CI-based DOA estimation technique with multi-sample diversity as a novel solution for the case of multiple time-domain samples. We clearly compare the proposed simultaneous CI technique with the conventional CI technique and we compare the existing Multiple Signal Classification (MUSIC)-based DOA estimation technique with the conventional CI-based technique by using the DOA spectrum as well. To the best of our knowledge, the simultaneous CI-based DOA estimation technique that effectively utilizes the characteristics of multiple signal sources over multiple time-domain samples has not been reported in the literature. Through extensive computer simulations, we show that the proposed simultaneous CI technique significantly outperforms both the conventional CI technique in terms of DOA estimation even in harsh environments and with various antenna array structures. It is worth noting that the proposed simultaneous CI technique results in much better performance than the classical MUSIC algorithm, which is one of the most representative subspace-based DOA estimation techniques. |
| first_indexed | 2024-03-11T11:21:34Z |
| format | Article |
| id | doaj.art-9ad40e7d5a024b7bb159f60875062e1b |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T11:21:34Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-9ad40e7d5a024b7bb159f60875062e1b2023-11-10T15:12:51ZengMDPI AGSensors1424-82202023-11-012321893810.3390/s23218938Simultaneous Correlative Interferometer Technique for Direction Finding of Signal SourcesMinkyu Oh0Young-Seok Lee1In-Ki Lee2Bang Chul Jung3Department of Electronics Engineering, Chungnam National University, Daejeon 34134, Republic of KoreaDepartment of Electronics Engineering, Chungnam National University, Daejeon 34134, Republic of KoreaSatellite Communication Infra Research Section, Electronics and Telecommunications Research Institute, Daejeon 34129, Republic of KoreaDepartment of Electronics Engineering, Chungnam National University, Daejeon 34134, Republic of KoreaIn this paper, we propose a novel simultaneous Correlative Interferometer (CI) technique that elaborately estimates the Direction of Arrival (DOA) of multiple source signals incident on an antenna array. The basic idea of the proposed technique is that the antenna-array-based receiver compares the phase of the received signal with one of the candidates at each time sample and jointly exploits these multiple time samples to estimate the DOAs of multiple signal sources. The proposed simultaneous CI-based DOA estimation technique collectively utilizes multiple time-domain samples and can be regarded as a generalized version of the conventional CI algorithm for the case of multiple time-domain samples. We first thoroughly review the conventional CI algorithm to comprehensively explain the procedure of the direction-finding algorithm that adopts the phase information of received signals. We also discuss several technical issues of conventional CI-based DOA estimation techniques that are originally proposed for the case of a single time-domain sample. Then, we propose a simultaneous CI-based DOA estimation technique with multi-sample diversity as a novel solution for the case of multiple time-domain samples. We clearly compare the proposed simultaneous CI technique with the conventional CI technique and we compare the existing Multiple Signal Classification (MUSIC)-based DOA estimation technique with the conventional CI-based technique by using the DOA spectrum as well. To the best of our knowledge, the simultaneous CI-based DOA estimation technique that effectively utilizes the characteristics of multiple signal sources over multiple time-domain samples has not been reported in the literature. Through extensive computer simulations, we show that the proposed simultaneous CI technique significantly outperforms both the conventional CI technique in terms of DOA estimation even in harsh environments and with various antenna array structures. It is worth noting that the proposed simultaneous CI technique results in much better performance than the classical MUSIC algorithm, which is one of the most representative subspace-based DOA estimation techniques.https://www.mdpi.com/1424-8220/23/21/89386Gwireless positioningDirection of Arrival (DOA)direction findingarray antennaUniform Circular Array (UCA) |
| spellingShingle | Minkyu Oh Young-Seok Lee In-Ki Lee Bang Chul Jung Simultaneous Correlative Interferometer Technique for Direction Finding of Signal Sources Sensors 6G wireless positioning Direction of Arrival (DOA) direction finding array antenna Uniform Circular Array (UCA) |
| title | Simultaneous Correlative Interferometer Technique for Direction Finding of Signal Sources |
| title_full | Simultaneous Correlative Interferometer Technique for Direction Finding of Signal Sources |
| title_fullStr | Simultaneous Correlative Interferometer Technique for Direction Finding of Signal Sources |
| title_full_unstemmed | Simultaneous Correlative Interferometer Technique for Direction Finding of Signal Sources |
| title_short | Simultaneous Correlative Interferometer Technique for Direction Finding of Signal Sources |
| title_sort | simultaneous correlative interferometer technique for direction finding of signal sources |
| topic | 6G wireless positioning Direction of Arrival (DOA) direction finding array antenna Uniform Circular Array (UCA) |
| url | https://www.mdpi.com/1424-8220/23/21/8938 |
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