A Fast Parameter Estimation Algorithm for Near-field Non-circular Signals
In this paper, a fast parameter estimation algorithm for near-field non-circular signals is proposed, which is based on symmetric, uniform, and linear array, that decouple the near-field steering vector via non-circularity and symmetry. Then, the position parameters are estimated based upon polynomi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
China Science Publishing & Media Ltd. (CSPM)
2020-09-01
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| Series: | Leida xuebao |
| Subjects: | |
| Online Access: | https://radars.ac.cn/cn/article/doi/10.12000/JR20053 |
| _version_ | 1797430156674990080 |
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| author | Jiaqi SONG Haihong TAO |
| author_facet | Jiaqi SONG Haihong TAO |
| author_sort | Jiaqi SONG |
| collection | DOAJ |
| description | In this paper, a fast parameter estimation algorithm for near-field non-circular signals is proposed, which is based on symmetric, uniform, and linear array, that decouple the near-field steering vector via non-circularity and symmetry. Then, the position parameters are estimated based upon polynomial rooting technique instead of traditional spectral search. After fixing the array structure, the parameters for estimation equation are ascertained. Then the values of position parameters are obtained by solving the polynomial equations; consequently, computational difficulty is alleviated effectively. In addition, the Degree-Of-Freedom (DOF) is increased by utilizing the non-circularity characteristics of the impinging sources. It can be seen from the performance analysis and computer simulation experiments that the proposed algorithm can resolve more near-field non-circular signals and can improve parameter estimation performance, which is closer to the Cramer–Rao Bound (CRB) estimation. |
| first_indexed | 2024-03-09T09:23:35Z |
| format | Article |
| id | doaj.art-ea5bb2cd96fc4b439256a276003a7de1 |
| institution | Directory Open Access Journal |
| issn | 2095-283X |
| language | English |
| last_indexed | 2024-03-09T09:23:35Z |
| publishDate | 2020-09-01 |
| publisher | China Science Publishing & Media Ltd. (CSPM) |
| record_format | Article |
| series | Leida xuebao |
| spelling | doaj.art-ea5bb2cd96fc4b439256a276003a7de12023-12-02T06:50:26ZengChina Science Publishing & Media Ltd. (CSPM)Leida xuebao2095-283X2020-09-019463263910.12000/JR20053R20053A Fast Parameter Estimation Algorithm for Near-field Non-circular SignalsJiaqi SONG0Haihong TAO1National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, ChinaNational Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, ChinaIn this paper, a fast parameter estimation algorithm for near-field non-circular signals is proposed, which is based on symmetric, uniform, and linear array, that decouple the near-field steering vector via non-circularity and symmetry. Then, the position parameters are estimated based upon polynomial rooting technique instead of traditional spectral search. After fixing the array structure, the parameters for estimation equation are ascertained. Then the values of position parameters are obtained by solving the polynomial equations; consequently, computational difficulty is alleviated effectively. In addition, the Degree-Of-Freedom (DOF) is increased by utilizing the non-circularity characteristics of the impinging sources. It can be seen from the performance analysis and computer simulation experiments that the proposed algorithm can resolve more near-field non-circular signals and can improve parameter estimation performance, which is closer to the Cramer–Rao Bound (CRB) estimation.https://radars.ac.cn/cn/article/doi/10.12000/JR20053near-field parameter estimationnon-circular signalrank reduction theorypolynomial rooting techniquecramer-rao bound (crb) |
| spellingShingle | Jiaqi SONG Haihong TAO A Fast Parameter Estimation Algorithm for Near-field Non-circular Signals Leida xuebao near-field parameter estimation non-circular signal rank reduction theory polynomial rooting technique cramer-rao bound (crb) |
| title | A Fast Parameter Estimation Algorithm for Near-field Non-circular Signals |
| title_full | A Fast Parameter Estimation Algorithm for Near-field Non-circular Signals |
| title_fullStr | A Fast Parameter Estimation Algorithm for Near-field Non-circular Signals |
| title_full_unstemmed | A Fast Parameter Estimation Algorithm for Near-field Non-circular Signals |
| title_short | A Fast Parameter Estimation Algorithm for Near-field Non-circular Signals |
| title_sort | fast parameter estimation algorithm for near field non circular signals |
| topic | near-field parameter estimation non-circular signal rank reduction theory polynomial rooting technique cramer-rao bound (crb) |
| url | https://radars.ac.cn/cn/article/doi/10.12000/JR20053 |
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