DocumentCode :
2505229
Title :
Robust adaptive beamforming algorithms using low-complexity mismatch estimation
Author :
Landau, Lukas ; De Lamare, Rodrigo C. ; Haardt, Martin
Author_Institution :
Dept. of Electron., Univ. of York, York, UK
fYear :
2011
fDate :
28-30 June 2011
Firstpage :
445
Lastpage :
448
Abstract :
We develop robust adaptive beamforming algorithms using low-complexity mismatch estimation (LOCME) of the array steering vector. The new feature is combined with the worst-case optimization-based beamformer, which can be solved as a second-order cone program (SOCP). In addition, we combine LOCME with a similar approach to the worst-case design using a joint optimization strategy based on the conjugate gradient method. The algorithms are developed in accordance with the constrained minimum variance design as well as the constrained constant modulus design criterion. While the LOCME feature does not affect the complexity order, the simulation results of all proposed algorithms show a superior performance, close to the optimum. Similarly to other mismatch estimation techniques, LOCME does not require additional information about the array steering vector mismatch. All proposed algorithms outperform the conventional worst-case optimization based algorithm, whereas the complexity is more than an order of magnitude lower, in case of the joint optimization-based approach.
Keywords :
array signal processing; conjugate gradient methods; estimation theory; optimisation; LOCME; SOCP; array steering vector mismatch; conjugate gradient method; constrained constant modulus design criterion; constrained minimum variance design; joint optimization strategy; low-complexity mismatch estimation technique; robust adaptive beamforming algorithm; second-order cone program; worst-case optimization-based beamformer; Algorithm design and analysis; Array signal processing; Arrays; Complexity theory; Optimization; Robustness; Signal processing algorithms; array steering vector mismatch estimation; low-complexity methods; robust adaptive beamforming;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Statistical Signal Processing Workshop (SSP), 2011 IEEE
Conference_Location :
Nice
ISSN :
pending
Print_ISBN :
978-1-4577-0569-4
Type :
conf
DOI :
10.1109/SSP.2011.5967727
Filename :
5967727
Link To Document :
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