Doubly Constrained Robust Blind Beamforming Algorithm
We propose doubly constrained robust least-squares constant modulus algorithm (LSCMA) to solve the problem of signal steering vector mismatches via the Bayesian method and worst-case performance optimization, which is based on the mismatches between the actual and presumed steering vectors. The weig...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Journal of Applied Mathematics |
| Online Access: | http://dx.doi.org/10.1155/2013/245609 |
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| author | Xin Song Jingguo Ren Qiuming Li |
| author_facet | Xin Song Jingguo Ren Qiuming Li |
| author_sort | Xin Song |
| collection | DOAJ |
| description | We propose doubly constrained robust least-squares constant modulus algorithm (LSCMA) to solve the problem of signal steering vector mismatches via the Bayesian method and worst-case performance optimization, which is based on the mismatches between the actual and presumed steering vectors. The weight vector is iteratively updated with penalty for the worst-case signal steering vector by the partial Taylor-series expansion and Lagrange multiplier method, in which the Lagrange multipliers can be optimally derived and incorporated at each step. A theoretical analysis for our proposed algorithm in terms of complexity cost, convergence performance, and SINR performance is presented in this paper. In contrast to the linearly constrained LSCMA, the proposed algorithm provides better robustness against the signal steering vector mismatches, yields higher signal captive performance, improves greater array output SINR, and has a lower computational cost. The simulation results confirm the superiority of the proposed algorithm on beampattern control and output SINR enhancement. |
| format | Article |
| id | doaj-art-06515fc45a1844d1bfc4d3bffa495a1b |
| institution | Kabale University |
| issn | 1110-757X 1687-0042 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Applied Mathematics |
| spelling | doaj-art-06515fc45a1844d1bfc4d3bffa495a1b2025-08-20T03:54:16ZengWileyJournal of Applied Mathematics1110-757X1687-00422013-01-01201310.1155/2013/245609245609Doubly Constrained Robust Blind Beamforming AlgorithmXin Song0Jingguo Ren1Qiuming Li2Engineering Optimization and Smart Antenna Institute, Northeastern University at Qinhuangdao, Qinhuangdao 066004, ChinaEngineering Optimization and Smart Antenna Institute, Northeastern University at Qinhuangdao, Qinhuangdao 066004, ChinaEngineering Optimization and Smart Antenna Institute, Northeastern University at Qinhuangdao, Qinhuangdao 066004, ChinaWe propose doubly constrained robust least-squares constant modulus algorithm (LSCMA) to solve the problem of signal steering vector mismatches via the Bayesian method and worst-case performance optimization, which is based on the mismatches between the actual and presumed steering vectors. The weight vector is iteratively updated with penalty for the worst-case signal steering vector by the partial Taylor-series expansion and Lagrange multiplier method, in which the Lagrange multipliers can be optimally derived and incorporated at each step. A theoretical analysis for our proposed algorithm in terms of complexity cost, convergence performance, and SINR performance is presented in this paper. In contrast to the linearly constrained LSCMA, the proposed algorithm provides better robustness against the signal steering vector mismatches, yields higher signal captive performance, improves greater array output SINR, and has a lower computational cost. The simulation results confirm the superiority of the proposed algorithm on beampattern control and output SINR enhancement.http://dx.doi.org/10.1155/2013/245609 |
| spellingShingle | Xin Song Jingguo Ren Qiuming Li Doubly Constrained Robust Blind Beamforming Algorithm Journal of Applied Mathematics |
| title | Doubly Constrained Robust Blind Beamforming Algorithm |
| title_full | Doubly Constrained Robust Blind Beamforming Algorithm |
| title_fullStr | Doubly Constrained Robust Blind Beamforming Algorithm |
| title_full_unstemmed | Doubly Constrained Robust Blind Beamforming Algorithm |
| title_short | Doubly Constrained Robust Blind Beamforming Algorithm |
| title_sort | doubly constrained robust blind beamforming algorithm |
| url | http://dx.doi.org/10.1155/2013/245609 |
| work_keys_str_mv | AT xinsong doublyconstrainedrobustblindbeamformingalgorithm AT jingguoren doublyconstrainedrobustblindbeamformingalgorithm AT qiumingli doublyconstrainedrobustblindbeamformingalgorithm |