Robust Rank Reduction Algorithm with Iterative Parameter Optimization and Vector Perturbation
AbstractIn dynamic propagation environments, beamforming algorithms may suffer from strong interference, steering vector mismatches, a low convergence speed and a high computational complexity. Reduced-rank signal processing techniques provide a way to address the problems mentioned above. This paper presents a low-complexity robust data-dependent dimensionality reduction based on an iterative optimization with steering vector perturbation (IOVP) algorithm for reduced-rank beamforming and steering vector estimation. The proposed robust optimization procedure jointly adjusts the parameters of a rank reduction matrix and an adaptive beamformer. The optimized rank reduction matrix projects the received signal vector onto a subspace with lower dimension. The beamformer/steering vector optimization is then performed in a reduced dimension subspace. We devise efficient stochastic gradient and recursive least-squares algorithms for implementing the proposed robust IOVP design. The proposed robust IOVP beamforming algorithms result in a faster convergence speed and an improved performance. Simulation results show that the proposed IOVP algorithms outperform some existing full-rank and reduced-rank algorithms with a comparable complexity. View Full-Text
Scifeed alert for new publicationsNever miss any articles matching your research from any publisher
- Get alerts for new papers matching your research
- Find out the new papers from selected authors
- Updated daily for 49'000+ journals and 6000+ publishers
- Define your Scifeed now
Li, P.; Feng, J.; de Lamare, R.C. Robust Rank Reduction Algorithm with Iterative Parameter Optimization and Vector Perturbation. Algorithms 2015, 8, 573-589.
Li P, Feng J, de Lamare RC. Robust Rank Reduction Algorithm with Iterative Parameter Optimization and Vector Perturbation. Algorithms. 2015; 8(3):573-589.Chicago/Turabian Style
Li, Peng; Feng, Jiao; de Lamare, Rodrigo C. 2015. "Robust Rank Reduction Algorithm with Iterative Parameter Optimization and Vector Perturbation." Algorithms 8, no. 3: 573-589.