Robust Adaptive Beamforming against Signal Steering Vector Mismatch and Jammer Motion
Since adaptive beamformer suffers from output performance degradation in the presence of interference nonstationarity and signal steering vector mismatch, a novel robust null broadening adaptive beamforming is proposed. The proposed method is realized by the combination of projection transform and d...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2015-01-01
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| Series: | International Journal of Antennas and Propagation |
| Online Access: | http://dx.doi.org/10.1155/2015/780296 |
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| _version_ | 1832560368621191168 |
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| author | Xiaojun Mao Wenxing Li Yingsong Li Yaxiu Sun Zhuqun Zhai |
| author_facet | Xiaojun Mao Wenxing Li Yingsong Li Yaxiu Sun Zhuqun Zhai |
| author_sort | Xiaojun Mao |
| collection | DOAJ |
| description | Since adaptive beamformer suffers from output performance degradation in the presence of interference nonstationarity and signal steering vector mismatch, a novel robust null broadening adaptive beamforming is proposed. The proposed method is realized by the combination of projection transform and diagonal loading techniques. First, a new projection matrix with null broadening ability is constructed and then projects the array received data onto the projection matrix. With the diagonal loading technique, a new sample covariance matrix is obtained. The theoretical analysis shows that the projection transform operation can expand the incident direction of the interference and improve orthogonality between the signal-plus-interference and the noise subspaces; thus the proposed beamformer can effectively broaden the jammer null and enhance the null depth. The analytical expressions of the proposed algorithm are also provided, which are efficient and easily solved. Simulation results are presented and demonstrated that the proposed beamformer can provide strong robustness against signal steering vector mismatch and jammer motion. |
| format | Article |
| id | doaj-art-0f6c4bcd74274300bfe963a64c3f5625 |
| institution | Kabale University |
| issn | 1687-5869 1687-5877 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Antennas and Propagation |
| spelling | doaj-art-0f6c4bcd74274300bfe963a64c3f56252025-02-03T01:27:37ZengWileyInternational Journal of Antennas and Propagation1687-58691687-58772015-01-01201510.1155/2015/780296780296Robust Adaptive Beamforming against Signal Steering Vector Mismatch and Jammer MotionXiaojun Mao0Wenxing Li1Yingsong Li2Yaxiu Sun3Zhuqun Zhai4College of Information and Communications Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Information and Communications Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Information and Communications Engineering, Harbin Engineering University, Harbin 150001, ChinaCollege of Information and Communications Engineering, Harbin Engineering University, Harbin 150001, ChinaInstitute of Systems, Beijing 100161, ChinaSince adaptive beamformer suffers from output performance degradation in the presence of interference nonstationarity and signal steering vector mismatch, a novel robust null broadening adaptive beamforming is proposed. The proposed method is realized by the combination of projection transform and diagonal loading techniques. First, a new projection matrix with null broadening ability is constructed and then projects the array received data onto the projection matrix. With the diagonal loading technique, a new sample covariance matrix is obtained. The theoretical analysis shows that the projection transform operation can expand the incident direction of the interference and improve orthogonality between the signal-plus-interference and the noise subspaces; thus the proposed beamformer can effectively broaden the jammer null and enhance the null depth. The analytical expressions of the proposed algorithm are also provided, which are efficient and easily solved. Simulation results are presented and demonstrated that the proposed beamformer can provide strong robustness against signal steering vector mismatch and jammer motion.http://dx.doi.org/10.1155/2015/780296 |
| spellingShingle | Xiaojun Mao Wenxing Li Yingsong Li Yaxiu Sun Zhuqun Zhai Robust Adaptive Beamforming against Signal Steering Vector Mismatch and Jammer Motion International Journal of Antennas and Propagation |
| title | Robust Adaptive Beamforming against Signal Steering Vector Mismatch and Jammer Motion |
| title_full | Robust Adaptive Beamforming against Signal Steering Vector Mismatch and Jammer Motion |
| title_fullStr | Robust Adaptive Beamforming against Signal Steering Vector Mismatch and Jammer Motion |
| title_full_unstemmed | Robust Adaptive Beamforming against Signal Steering Vector Mismatch and Jammer Motion |
| title_short | Robust Adaptive Beamforming against Signal Steering Vector Mismatch and Jammer Motion |
| title_sort | robust adaptive beamforming against signal steering vector mismatch and jammer motion |
| url | http://dx.doi.org/10.1155/2015/780296 |
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