Interference suppression by element position control of phased arrays using LM algorithm

Abu-Al-Nadi, Dia I.; Ismail, T. H.; Mismar, M. J.

doi:10.1016/j.aeue.2005.02.005

Cited by 29 publications

(14 citation statements)

References 10 publications

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“…Furthermore, suppression of interfering signals from prescribed directions due to the increasing pollution of electromagnetic environment is considered as an important problem in modern radar and communication system applications. In literature, there are many works concerned with reducing the SLL of a radiation pattern [1][2][3][4] or suppressing the regions having interfering signals [5][6][7][8][9][10]. Generally, these requirements are achieved by using two different methods.…”

Section: Introductionmentioning

confidence: 99%

The Multi-Objective Optimization of Non-Uniform Linear Phased Arrays Using the Genetic Algorithm

Tokan¹,

Güneş²

2009

PIER B

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Abstract-In this article, a linear phased antenna array for beam scanning is considered with a fixed narrow/broad interference out of the scanning region. This interference is aimed to be suppressed by optimizing the positions of array elements while avoiding the rise of maximum sidelobe level (MSLL) during the main beam is scanning within the prescribed region. These two objectives; suppressing the fixed interference and avoiding the rise of MSLL during scanning are in conflict with one another. In order to evaluate the effectiveness of such multi-objective approaches it is important to report Pareto optimal solutions which are the objective way of solving multi-objective optimization problems. Thus, in this work, the genetic algorithm (GA) is introduced for the purpose of obtaining the Pareto optimal fronts for the two conflicting objectives to show the effectiveness of the proposed method.

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Section: Introductionmentioning

confidence: 99%

The Multi-Objective Optimization of Non-Uniform Linear Phased Arrays Using the Genetic Algorithm

Tokan¹,

Güneş²

2009

PIER B

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“…By assuming that the phase or position perturbations are small, the nulling equations can be linearized. The phase-only control [5,6,9,17,21,22] utilizes the phase shifters while the position-only control [7][8][9][10][11]15] needs a mechanical driving system such as servomotors to move the array elements. Phase-only null synthesizing is less complicated and attractive for the phased arrays since the required controls are available at no extra cost, but it has still common problem.…”

Section: Introductionmentioning

confidence: 99%

Amplitude-Only Pattern Nulling of Linear Antenna Arrays With the Use of Bees Algorithm

Güney¹,

Onay²

2007

PIER

122

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Abstract-An efficient method based on bees algorithm (BA) for the pattern synthesis of linear antenna arrays with the prescribed nulls is presented. Nulling of the pattern is achieved by controlling only the amplitude of each array element. Numerical examples of Chebyshev pattern with the single, multiple and broad nulls imposed at the directions of interference are given to show the accuracy and flexibility of the BA.

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“…However, several challenges remain in the development of these adaptive systems. The techniques of placing nulls in the antenna patterns to suppress interference and the maximizing their gain in the direction of desired signal has received considerable attention in the past and still of great interest [4][5][6][7][8][9][10][11][12][13][14]. These techniques are very important in communication system, sonar, and radar applications for maximizing signal-to-interference ratio (or signal to interference and noise ratio) [11].…”

Section: Introductionmentioning

confidence: 99%

“…The technique of null steering including controlling the complex weights (the amplitude and phase) the excitation amplitude only and phase-only, and the element position only have been extensively considered in the literature [6,7,9,14]. The phase-only is of particular interest in pattern null steering [4].…”

Section: Introductionmentioning

confidence: 99%

Smart Antenna Array Patterns Synthesis: Null Steering and Multi-User Beamforming by Phase Control

Mouhamadou¹,

Vaudon²,

Rammal³

2006

PIER

158

118

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Abstract-In this article, an efficient method for the pattern synthesis of the linear antenna arrays with the prescribed null and multi-lobe Beamforming is presented. Multi-lobe pattern and adaptive nulling of the pattern is achieved by controlling only the phase of each array element. The proposed method is based on the Sequential Quadratic Programming (SQP) algorithm and the linear antenna array synthesis was modelled as a multi-objective optimization problem. Multi-objective optimization is concerned with the maximization (or minimization) of a vector of objectives functions in the directions of desired signal that can be subject of a number of constraints (in our case, the constraints can be imposed as the null in the direction of interfering signal). To verify the validity of the technique, several illustrative examples of uniform excited array patterns with the main beam is placed in the direction of the useful signal and null is placed in the direction of potential interferers, and multi-beam patterns are demonstrated.

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Interference suppression by element position control of phased arrays using LM algorithm

Cited by 29 publications

References 10 publications

The Multi-Objective Optimization of Non-Uniform Linear Phased Arrays Using the Genetic Algorithm

The Multi-Objective Optimization of Non-Uniform Linear Phased Arrays Using the Genetic Algorithm

Amplitude-Only Pattern Nulling of Linear Antenna Arrays With the Use of Bees Algorithm

Smart Antenna Array Patterns Synthesis: Null Steering and Multi-User Beamforming by Phase Control

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