A novel adaptive beamforming with reduced side lobe level using GSA

Sharma, Abhinav; Mathur, Sanjay

doi:10.1108/compel-07-2017-0311

Cited by 11 publications

(4 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, to enhance the performance of beamformers in the interference active environment, sidelobes should be controlled along with maximizing the OSINR. In recent years, various approaches have been developed for suppressing the sidelobes [13], [14], [15], [16], [17], [18]. But these algorithms were applied to linear arrays and can only suppress the sidelobes.…”

Section: Introductionmentioning

confidence: 99%

Improvements in Sparse Array Based Beamformer via Additional Constraints

Thakur,

Baghel,

Talluri

2023

IJCDS

View full text Add to dashboard Cite

This paper presents the improvements that can be achieved through the additional constraints in the design of highly sparse arrays beamforming. The design of a highly sparse array beamformer is an optimization problem of multivariable functions and its performance depends on the given conditions. For a uniform linear array (ULA), the Output Signal to Noise Ratio (OSINR) is a linear function of antenna elements of the array. However, this linearity is not consistent in various antenna array environments. This deviation can be minimized by selecting an optimal sparse array with a lesser number of elements than that are actually required by an ULA. In this paper, a two-step procedure has been presented to find an optimal solution for designing a highly sparse antenna array beamformer with sidelobe control. Furthermore, to avoid the grating lobes and minimize the mutual coupling between the elements an additional degree of freedom in the form of separation between antenna elements is added to the optimization problem. Simulations results provided in the paper reveals that sparse arrays with the additional conditions are better in comparison with the arrays without constraints in terms of sidelobe level, grating lobes and mutual coupling.

show abstract

Section: Introductionmentioning

confidence: 99%

Improvements in Sparse Array Based Beamformer via Additional Constraints

Thakur,

Baghel,

Talluri

2023

IJCDS

View full text Add to dashboard Cite

show abstract

“…The essence of beamforming in modern array antenna systems has gained remarkable recognition and continues to constitute a field of intense research (Bailleul, 2016). Among them, one may discern the design of advanced 5G communication systems (Nadeem et al , 2019), the reconfigurable suppression of undesired side lobes (Sharma and Mathur, 2018) and minimisation of mutual coupling (Kim and Nam, 2019) in multiple-input multiple-output (MIMO) antennas (Moghaddam and Alibeigi, 2016; Lee et al , 2018; Buzzi and D’Andrea, 2018; Nguyen et al , 2020) as well as the development of energy-efficient wireless power transfer devices (Khattak and Akhtar, 2016; Lim et al , 2017; Dong et al , 2020). Not to mention the multi-mode pattern photonics-oriented structures (Nagayama et al , 2018; Numan et al , 2018; Johannsen and Hoeher, 2020; Emara et al , 2020) or the wideband, yet highly focusing, components for unmanned air vehicles (UAVs) (Jovanović et al , 2016; Zhou, 2019; Li et al , 2019).…”

Section: Introductionmentioning

confidence: 99%

Enhanced beamforming techniques for cylindrical-substrate microstrip array antennas

Exadaktylos

Karatzidis

Zygiridis

et al. 2022

COMPEL

View full text Add to dashboard Cite

Purpose A class of robust and efficient beamforming methods is developed in this paper for the optimised design of realistic microstrip antennas on arbitrarily curved substrates. More specifically, this paper aims to focus on the formulation of an effective and computationally light beamforming algorithm and its implementation on a novel realistic cylindrical-substrate microstrip array antenna with significantly decreased size, wideband operation and enhanced radiation characteristics. Design/methodology/approach The proposed multi-parametric schemes introduce an efficient null-steering concept, which drastically annihilates the undesired beamformer waveform artefacts, while retaining the real output signal undistorted. In particular, the key objective is the accurate calculation of the appropriate complex feeding weights, required to set nulls along the propagation directions of the unwanted signals and a maximum towards the propagation direction of the desired incoming signal. The featured technique, combined with a modified finite element method, is applied to the design of a new family of cylindrical-substrate microstrip array antennas. Findings Numerical results, mainly concerning customisable three-dimensional radiation patterns and attributes, certify the merits of the algorithm and its limited system demands. The introduced beamforming algorithms are applied to a variety of different inputs (desired radiation patterns), which indicate that the designed cylindrical-substrate antenna overwhelms existing designs in terms of computational cost for the beamforming algorithm, while retaining acceptable values for radiation characteristics, such as gain, directivity and side-lobe suppression. In this manner, the effectiveness of the prior methodology and the benefits of this newly shaped array antenna are comprehensively revealed and substantiated. Originality/value Rigorous beamforming techniques in conjunction with a class of contemporary array antennas are developed for potential use in high-end communication systems, such as 5G configurations. The proposed cylindrical-shaped structures are systematically designed, with an emphasis on space efficiency and wideband radiation effectiveness to offer fully adjustable setups. To this aim, the cylindrical-substrate microstrip antenna, because of its inherent azimuthal symmetry and confined overall dimensions, provides reliable operation and promising performance.

show abstract

“…It also provides lower SLL, simulation time and an improvement of 3dB beamwidth when compared to equally spaced array. In [13], a gravitational search algorithm (GSA) is presented for ABF in linear antenna arrays with multi-objective function in order to reduce the SLL and direct the main lobe towards desired user and make nulls towards the interfering signals.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid GA/GE Beamforming Technique for Side Lobe Cancellation of Linear Antenna Arrays

Abdel-Rahman

Hussein

Shaalan

2021

AEM

View full text Add to dashboard Cite

Side lobe level reduction is one of the most critical research topics in antenna arrays beamforming as it mitigates the interfering and jamming signals. In this paper, a hybrid combination between the Genetic algorithm (GA) optimization technique and the gauss elimination (GE) equation solving technique is utilized for the introduction of the proposed GA/GE beamforming technique for linear antenna arrays. The proposed technique estimates the optimum excitation coefficients and the non-uniform inter-elements spacing for a specific side lobe (SL) cancellation without disturbing the half power beamwidth (HPBW) of the main beam. Different size Chebychev linear antenna arrays are taken as simulation targets. The simulation results revealed the effectiveness of the proposed technique

show abstract

A novel adaptive beamforming with reduced side lobe level using GSA

Cited by 11 publications

References 23 publications

Improvements in Sparse Array Based Beamformer via Additional Constraints

Improvements in Sparse Array Based Beamformer via Additional Constraints

Enhanced beamforming techniques for cylindrical-substrate microstrip array antennas

A Hybrid GA/GE Beamforming Technique for Side Lobe Cancellation of Linear Antenna Arrays

Contact Info

Product

Resources

About