Robust adaptive array beamforming under steering angle mismatch
Resource
Signal Processing 86 (2): 296-309
Journal
Signal Processing
Journal Volume
86
Journal Issue
2
Pages
296-309
Date Issued
2006
Date
2006
Author(s)
Abstract
The problem of adaptive array beamforming with multiple-beam constraints in the presence of steering angle error is considered. We first construct a cost function consisting of terms that utilize a posteriori information due to the received array data and an exponential constraint associated with steering angle error, respectively. Then, an appropriate estimate of the actual phase angle vector associated with each of the desired signals can be obtained by performing nonlinear optimization based on the cost function. An implementation algorithm is further presented to iteratively solve the problem. Theoretical analysis regarding the convergence property of the iterative procedure is also investigated. Finally, several computer simulation examples are provided for illustration and comparison. © 2005 Elsevier B.V. All rights reserved.
Subjects
Adaptive array beamforming; Steering angle error
Other Subjects
Adaptive systems; Algorithms; Convergence of numerical methods; Information analysis; Optimization; Problem solving; Steering; Adaptive array beamforming; Exponential constraint; Phase angle vectors; Steering angle error; Robustness (control systems)
Type
journal article
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