Null Steering in Failed Antenna Arrays

Null Steering in Failed Antenna Arrays

Antenna array pattern nulling is desirable in order to suppress the interfering signals. But in large antenna arrays, there is always a possibility of failure of some elements, which may degrade the radiation pattern with an increase in side lobe level (SLL) and removal of the nulls from desired pos...

Full description

Bibliographic Details
Main Authors: Om Prakash Acharya, Amalendu Patnaik, Sachendra N. Sinha
Format: Article
Language:English
Published: Hindawi Limited 2011-01-01
Series:Applied Computational Intelligence and Soft Computing
Online Access:http://dx.doi.org/10.1155/2011/692197
id doaj-8984ba148713442c909c748c2e90e94a
record_format Article
spelling doaj-8984ba148713442c909c748c2e90e94a2020-11-25T00:32:51ZengHindawi LimitedApplied Computational Intelligence and Soft Computing1687-97241687-97322011-01-01201110.1155/2011/692197692197Null Steering in Failed Antenna ArraysOm Prakash Acharya0Amalendu Patnaik1Sachendra N. Sinha2Department of Electronics and Computer Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, IndiaDepartment of Electronics and Computer Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, IndiaDepartment of Electronics and Computer Engineering, Indian Institute of Technology Roorkee, Roorkee 247 667, IndiaAntenna array pattern nulling is desirable in order to suppress the interfering signals. But in large antenna arrays, there is always a possibility of failure of some elements, which may degrade the radiation pattern with an increase in side lobe level (SLL) and removal of the nulls from desired position. In this paper a correction procedure is introduced based on Particle Swarm Optimization (PSO) which maintains the nulling performance of the failed antenna array. Considering the faulty elements as nonradiating elements, PSO reoptimizes the weights of the remaining radiating elements to reshape the pattern. Simulation results for a Chebyshev array with imposed single, multiple, and broad nulls with failed antenna array are presented.http://dx.doi.org/10.1155/2011/692197
collection DOAJ
language English
format Article
sources DOAJ
author Om Prakash Acharya
Amalendu Patnaik
Sachendra N. Sinha
spellingShingle Om Prakash Acharya
Amalendu Patnaik
Sachendra N. Sinha
Null Steering in Failed Antenna Arrays
Applied Computational Intelligence and Soft Computing
author_facet Om Prakash Acharya
Amalendu Patnaik
Sachendra N. Sinha
author_sort Om Prakash Acharya
title Null Steering in Failed Antenna Arrays
title_short Null Steering in Failed Antenna Arrays
title_full Null Steering in Failed Antenna Arrays
title_fullStr Null Steering in Failed Antenna Arrays
title_full_unstemmed Null Steering in Failed Antenna Arrays
title_sort null steering in failed antenna arrays
publisher Hindawi Limited
series Applied Computational Intelligence and Soft Computing
issn 1687-9724
1687-9732
publishDate 2011-01-01
description Antenna array pattern nulling is desirable in order to suppress the interfering signals. But in large antenna arrays, there is always a possibility of failure of some elements, which may degrade the radiation pattern with an increase in side lobe level (SLL) and removal of the nulls from desired position. In this paper a correction procedure is introduced based on Particle Swarm Optimization (PSO) which maintains the nulling performance of the failed antenna array. Considering the faulty elements as nonradiating elements, PSO reoptimizes the weights of the remaining radiating elements to reshape the pattern. Simulation results for a Chebyshev array with imposed single, multiple, and broad nulls with failed antenna array are presented.
url http://dx.doi.org/10.1155/2011/692197
work_keys_str_mv AT omprakashacharya nullsteeringinfailedantennaarrays
AT amalendupatnaik nullsteeringinfailedantennaarrays
AT sachendransinha nullsteeringinfailedantennaarrays
_version_ 1725318674668060672

Similar Items