PSO-based optimal beamforming in MmWave-NOMA systems with sparse antenna array

Azhiri, Fatemeh Asghari; Tazehkand, Behzad Mozaffari; Abdolee, Reza

doi:10.1007/s00500-022-06918-y

Cited by 3 publications

(1 citation statement)

References 33 publications

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“…An adaptive array beamformer using PSO is proposed in [29], where an initial DOA estimate is first determined using a PSO estimator to improve the overall beamformer performance. A PSO-based algorithm is utilized in [30] to address the outage problem for the millimeter-wave (mmWave) non-orthogonal multiple access (NOMA) system.…”

Section: Introductionmentioning

confidence: 99%

A Multiobjective Array Beamforming Method for Arrays of Flexible Shape

Meng,

Zhang,

Temiz

et al. 2024

Electronics

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High-performance beamforming incorporating multiple objectives for large-scale antenna arrays becomes increasingly important to improve the capacity and efficiency of wireless communication systems. The speed of synthesizing a desired beam pattern is critical in wireless communications systems to adapt to highly dynamic wireless channels. A modified particle swarm optimization (PSO) algorithm for synthesizing array beam patterns is proposed in this study. The initial positions of particles in PSO are designated following a Taylor distribution instead of being given uniformly distributed random values as in the classical PSO algorithm. The fitness functions are defined to include multiple objectives represented by producing multiple main lobes with customized deep and broadened nulls. Several scenarios have been established to examine the feasibility of the proposed algorithm. Moreover, the performance of the proposed algorithm is compared with those of the ones based on the classical PSO. A significant performance improvement for obtaining beamforming coefficients has been achieved. The robustness of the proposed algorithm is demonstrated further by applying it to a finite array on a curved surface for beamforming.

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Section: Introductionmentioning

confidence: 99%

A Multiobjective Array Beamforming Method for Arrays of Flexible Shape

Meng,

Zhang,

Temiz

et al. 2024

Electronics

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An optimized microstrip antenna to generate intense localized heating at target sites for maximum effect

Rajebi,

Pedrammehr,

Al-Abdullah

et al. 2024

Discov Appl Sci

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Nowadays, the use of electromagnetic waves in medical applications has become common, and hyperthermia is one of the popular areas. Nonetheless, designing effective antennas for electromagnetic hyperthermia poses a key challenge. In designing of hyperthermia antennas for medical applications, factors such as appropriate resonant frequencies and appropriate antenna sizes are important. Another critical aspect in the design of useful and usable hyperthermia antenna is the heat on the target body area, since a proper depth setting for heating is normally neglected. In this paper, using the Particle Swarm Optimization (PSO) algorithm, we focus on the heat on the target area when designing a hyperthermia antenna that operates at the frequency of 432 MHz. The antenna is analyzed using the finite difference time domain method, while the PSO fitness function is selected in such a way as to maintain the optimal frequency characteristics of the antenna, along with optimization of its heating performance. A series of simulation studies in MATLAB and the associated laboratory results confirm accuracy of the designed antenna. With minimal influence on healthy tissues, the temperature of approximately 42 degrees Celsius is achieved steadily after about 12 min from the start of heating in the target area, where the tumor is located. We observe minor differences between simulation and laboratory results, owing to not being able to use living tissue in the laboratory and lack of precision in the construction of antenna with optimized parameters.

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Performance Improvement of Millimeter Wave Antennas (Review)

Gupta

2022

Radioelectron.Commun.Syst.

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PSO-based optimal beamforming in MmWave-NOMA systems with sparse antenna array

Cited by 3 publications

References 33 publications

A Multiobjective Array Beamforming Method for Arrays of Flexible Shape

A Multiobjective Array Beamforming Method for Arrays of Flexible Shape

An optimized microstrip antenna to generate intense localized heating at target sites for maximum effect

Performance Improvement of Millimeter Wave Antennas (Review)

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