DocumentCode :
1107193
Title :
An adaptive nulling system for a narrow-band signal with a look-direction constraint utilizing the conjugate gradient method
Author :
Sarkar, T.K. ; Sangruji, N.
Author_Institution :
Dept. of Electr. Eng., Syracuse Univ., NY, USA
Volume :
37
Issue :
7
fYear :
1989
fDate :
7/1/1989 12:00:00 AM
Firstpage :
940
Lastpage :
944
Abstract :
The problem of iterative adjustments of the weights of a phased array with a look-direction constraint in the presence of jammers is presented. The technique described uses the adaptive conjugate method instead of the popularly used method of steepest descent to eliminate the jammer components, thus minimizing the error between the received signal and the actual one. This iterative method minimized the L/sub 2/ norm (the mean square error) and is guaranteed to converge in a finite number of steps which is not available for the present techniques utilized to solve this problem. Improvement in rate of convergence is thus achieved at the expense of algorithmic complexity.<>
Keywords :
antenna phased arrays; convergence of numerical methods; interference suppression; iterative methods; jamming; adaptive nulling system; antenna arrays; conjugate gradient method; convergence rates; iterative method; jammers; look-direction constraint; mean square error; narrow-band signal; phased array; Adaptive arrays; Adaptive systems; Convergence; Covariance matrix; Gradient methods; Interference constraints; Iterative algorithms; Jamming; Narrowband; Phased arrays;
fLanguage :
English
Journal_Title :
Antennas and Propagation, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-926X
Type :
jour
DOI :
10.1109/8.29389
Filename :
29389
Link To Document :
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