Array pattern synthesis approach using a genetic algorithm

Elkamchouchi, Hassan M.; Hassan, Mohamed M.

doi:10.1049/iet-map.2013.0718

Cited by 20 publications

(23 citation statements)

References 11 publications

(11 reference statements)

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“…The key is to calculate the excitation amplitudes and phase delays of each element accurately in accord with the system requirement [19]. A variety of solutions such as simulated annealing [20]- [22], genetic algorithm (GA) [23]- [25], particle swarm optimization (PSO) [26] and compressive sensing [27] have been suggested, but they often require more complicated hardware design and delicate error control. Moreover, they might be too slow for application in a real operational system.…”

Section: Introductionmentioning

confidence: 99%

An Overview on Time/Frequency Modulated Array Processing

Wang

Farina³

2017

IEEE J. Sel. Top. Signal Process.

189

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Time and frequency modulated arrays have numerous application areas including radar, navigation and communications. Specifically, a time modulated array can create a beampattern with low sidelobes via connecting and disconnecting the antenna elements from the feed network, while the frequency modulated frequency diverse array produces a range-dependent pattern. In this paper, we aim to introduce these advanced arrays to the signal processing community so that more investigations in terms of theory, methods and applications, can be facilitated. The research progress of time/frequency modulated array studies is reviewed and the most recent advances are discussed. Moreover, potential applications in radar and communications are presented, along with their technical challenges, especially in signal processing aspects.Index Terms-Time modulated array, frequency modulated array, frequency diverse array, array signal processing, phasedarray, range-dependent beamforming, multiple-input multipleoutput (MIMO) radar.

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Section: Introductionmentioning

confidence: 99%

An Overview on Time/Frequency Modulated Array Processing

Wang

Farina³

2017

IEEE J. Sel. Top. Signal Process.

189

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“…Compared with equally spaced arrays, unequally spaced arrays with optimally spaced sensors have advantages including their capability of achieving higher spatial resolutions or lower sidelobe, or we can use fewer sensors to meet similar pattern specifications by carefully designing the locations of array sensors [4][5][6]. By changing the amplitudes and phases of the array elements' complex weights without any physical changes in the array, the method becomes suitable for adaptive processing applications in which the array pattern is dynamically adapted to the environments [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Array Pattern Synthesis Using Particle Swarm Optimization with Dynamic Inertia Weight

Han

2016

International Journal of Antennas and Propagation

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A Feedback Particle Swarm Optimization (FPSO) with a family of fitness functions is proposed to minimize sidelobe level (SLL) and control null. In order to search in a large initial space and converge fast in local space to a refined solution, a FPSO with nonlinear inertia weight algorithm is developed, which is determined by a subtriplicate function with feedback taken from the fitness of the best previous position. The optimized objectives in the fitness function can obtain an accurate null level independently. The directly constrained SLL range reveals the capability to reduce SLL. Considering both element positions and complex weight coefficients, a low-level SLL, accurate null at specific directions, and constrained main beam are achieved. Numerical examples using a uniform linear array of isotropic elements are simulated, which demonstrate the effectiveness of the proposed array pattern synthesis approach.

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“…Aperiodic arrays with optimally spaced sensors have the advantage of achieving higher spatial resolutions or lower sidelobe. On the other hand, many techniques proposed in the literatures adjust the weight coefficients when deriving the solution to beam pattern synthesis [9]- [11]. Phase-only control widely used in phased arrays to provide beam scanning are less expensive to produce, and also, are more likely to minimize excitation errors and preserve coherence [10].…”

Section: Introductionmentioning

confidence: 99%