Performance of DMI and eigenspace-based beamformers
- 1 November 1992
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 40 (11), 1336-1347
- https://doi.org/10.1109/8.202711
Abstract
The performance of the direct matrix inversion (DMI) method for antenna arrays of arbitrary geometry is analyzed by asymptotic statistical techniques. The effects of eigenspace disturbance caused by finite samples on the output interference and noise powers are examined under the unit gain constraint in the direction of the desired signal. The results show that the performance of the DMI method is degraded mostly by the disturbed noise subspace. That suggests the use of an eigenspace-based beamformer in which the weight vector is computed by using the signal-plus-interference subspace component of the sample correlation matrix. Convergence properties of the eigenspace-based beamformer are evaluated for the cases in which the source number is known and in which it is overestimated. Theoretical analyses validated by computer simulations indicate that the eigenspace-based beamformer has faster convergence rate than the DMI method.<>Keywords
This publication has 16 references indexed in Scilit:
- An improved eigenvector beamformerPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2005
- Adaptive antenna arrays using eigenvector methodsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- A constraint projection approach for robust adaptive beamformingPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1991
- An eigenanalysis interference cancelerIEEE Transactions on Signal Processing, 1991
- Eigenstructure based partially adaptive array designIEEE Transactions on Antennas and Propagation, 1988
- Simple, effective computation of principal eigenvectors and their eigenvalues and application to high-resolution estimation of frequenciesIEEE Transactions on Acoustics, Speech, and Signal Processing, 1986
- Multiple emitter location and signal parameter estimationIEEE Transactions on Antennas and Propagation, 1986
- A Fast Beamforming Algorithm for Large ArraysIEEE Transactions on Aerospace and Electronic Systems, 1983
- Adaptive Array PrinciplesPublished by Institution of Engineering and Technology (IET) ,1981
- The Retrieval of Harmonics from a Covariance FunctionGeophysical Journal International, 1973