Improved Mainlobe Interference Suppression Based on Blocking Matrix Preprocess
For the problem of mainlobe direction shifting that is caused by the mainlobe interference suppression based on blocking matrix preprocess, an effective method is proposed which is based on the combination of diagonal loading and linear constraints. Therein, the reason for mainlobe direction shiftin...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | Journal of Electrical and Computer Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/964901 |
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| _version_ | 1850172499265847296 |
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| author | Jie Yang Congfeng Liu |
| author_facet | Jie Yang Congfeng Liu |
| author_sort | Jie Yang |
| collection | DOAJ |
| description | For the problem of mainlobe direction shifting that is caused by the mainlobe interference suppression based on blocking matrix preprocess, an effective method is proposed which is based on the combination of diagonal loading and linear constraints. Therein, the reason for mainlobe direction shifting is analyzed and found to be that the covariance matrix mismatch exists in the realization of the adaptive beamforming. Therefore, the diagonal loading processing is used to overcome the mismatch and correct the mainlobe direction shifting, and the linear constraints are used to make sure of the beam pattern nulling in the interference directions; then the desired performance of adaptive beamforming is obtained. Simulation results attest the correctness and effectiveness of the proposed method, and they also show that the proposed method is insensitive to the selection of diagonal loading level, which means the loading factor is easy to choose. |
| format | Article |
| id | doaj-art-c7cbd09ee425419d8f8034d64def766d |
| institution | OA Journals |
| issn | 2090-0147 2090-0155 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Electrical and Computer Engineering |
| spelling | doaj-art-c7cbd09ee425419d8f8034d64def766d2025-08-20T02:20:05ZengWileyJournal of Electrical and Computer Engineering2090-01472090-01552015-01-01201510.1155/2015/964901964901Improved Mainlobe Interference Suppression Based on Blocking Matrix PreprocessJie Yang0Congfeng Liu1School of Communication and Information, Ai’an University of Post & Telecommunication, Xi’an, Shaanxi 710121, ChinaResearch Institute of Electronic Countermeasure, Xidian University, Xi’an, Shaanxi 710071, ChinaFor the problem of mainlobe direction shifting that is caused by the mainlobe interference suppression based on blocking matrix preprocess, an effective method is proposed which is based on the combination of diagonal loading and linear constraints. Therein, the reason for mainlobe direction shifting is analyzed and found to be that the covariance matrix mismatch exists in the realization of the adaptive beamforming. Therefore, the diagonal loading processing is used to overcome the mismatch and correct the mainlobe direction shifting, and the linear constraints are used to make sure of the beam pattern nulling in the interference directions; then the desired performance of adaptive beamforming is obtained. Simulation results attest the correctness and effectiveness of the proposed method, and they also show that the proposed method is insensitive to the selection of diagonal loading level, which means the loading factor is easy to choose.http://dx.doi.org/10.1155/2015/964901 |
| spellingShingle | Jie Yang Congfeng Liu Improved Mainlobe Interference Suppression Based on Blocking Matrix Preprocess Journal of Electrical and Computer Engineering |
| title | Improved Mainlobe Interference Suppression Based on Blocking Matrix Preprocess |
| title_full | Improved Mainlobe Interference Suppression Based on Blocking Matrix Preprocess |
| title_fullStr | Improved Mainlobe Interference Suppression Based on Blocking Matrix Preprocess |
| title_full_unstemmed | Improved Mainlobe Interference Suppression Based on Blocking Matrix Preprocess |
| title_short | Improved Mainlobe Interference Suppression Based on Blocking Matrix Preprocess |
| title_sort | improved mainlobe interference suppression based on blocking matrix preprocess |
| url | http://dx.doi.org/10.1155/2015/964901 |
| work_keys_str_mv | AT jieyang improvedmainlobeinterferencesuppressionbasedonblockingmatrixpreprocess AT congfengliu improvedmainlobeinterferencesuppressionbasedonblockingmatrixpreprocess |