Please use this identifier to cite or link to this item:
Title: Adaptive beamformer derived from a constrained null steering design
Authors: Leng, S.
Ser, W.
Ko, C.C. 
Keywords: Adaptive array
Array processing
Constrained null steering algorithm
Issue Date: May-2010
Citation: Leng, S., Ser, W., Ko, C.C. (2010-05). Adaptive beamformer derived from a constrained null steering design. Signal Processing 90 (5) : 1530-1541. ScholarBank@NUS Repository.
Abstract: In the environment where the desired signal is stronger or not significantly weaker than the interferences, nulling in the direction of interest becomes a problem for conventional zero tracking algorithm. The null steering algorithms with single and multiple constraints (NSASC, NSAMC) were proposed by the authors. With NSASC/NSAMC, the null positions can be selectively tracked one after another without affecting other null positions so that the interference signals can be rejected while the desired signal is concentrated by the array. The main advantage of NSASC/NSAMC is the simplicity. When compared with conventional LMS based linear constrained minimum variance (LCMV) beamforming algorithm, NSASC and NSAMC converge in a faster manner; and compared with QR-RLS based minimum variance distortionless response (MVDR) beamformer, NSASC and NSAMC have lower complexity. Furthermore, due to their cascade configurations, the signal self-nulling problem for conventional beamformer can be resolved by using NSASC/NSAMC. This paper provides further analysis and additional investigation on the convergence behavior, rules for sidelobe direction selection, ratio parameter and the effect of number of elements for NSASC/NSAMC. © 2009 Elsevier B.V. All rights reserved.
Source Title: Signal Processing
ISSN: 01651684
DOI: 10.1016/j.sigpro.2009.10.024
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Oct 12, 2018


checked on Oct 2, 2018

Page view(s)

checked on Sep 29, 2018

Google ScholarTM



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.