Optimization of Sparse Time-Modulated Array by Genetic Algorithm for Radar Applications

Euziere, Jerome; Guinvarc'H, Régis; Uguen, Bernard; Gillard, Raphaël

doi:10.1109/lawp.2014.2299285

Cited by 39 publications

(20 citation statements)

References 5 publications

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“…Many authors have already worked on the optimization of the latter time dimension. On the former, specially for radar, we can mention the use of sparse arrays (STMA [7]) and Phase Only Synthesis solution (POSTMA [8]). For all these cases, the number of degrees of freedom can be large (multiple amplitudes and/or phases for w mp , different durations ∆t p ), which gives better results, but longer optimization time.…”

Section: Time Modulated Arraymentioning

confidence: 99%

Time Modulated Array – A Database Approach

Euziere¹,

Guinvarc'H²,

Saenz³

et al. 2019

2019 27th European Signal Processing Conference (EUSIPCO)

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Time Modulated Array offers a simple way to synthesize radiation patterns with low sidelobe levels, in timeaverage, using an optimized strategy of switching ON and OFF the elements of the array. In this work we show that the complexity of the optimization strategy can be reduced by first shrinking the search space to a subset, or database, of useful solutions over which the optimization will be launched. This reduction is obtained by applying the constraints in a progressive and hierarchical order. In this way, this problem of exponential growth is reduced to a polynomial growth, with respect to the size of the antenna array. We present the case of designing the time modulated array for radar applications where constant directivity and ability of intereference rejection is needed.

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Section: Time Modulated Arraymentioning

confidence: 99%

Time Modulated Array – A Database Approach

Euziere¹,

Guinvarc'H²,

Saenz³

et al. 2019

2019 27th European Signal Processing Conference (EUSIPCO)

Self Cite

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“…Such a capability of adaptive nulling in time-varying scenarios was evaluated in [32] by Poli et al, and completed in [33]. Further examples are the synthesis of the so-called power-patterns for wide coverage purposes [34,35], or radar applications [36,37]. …”

Section: State Of the Artmentioning

confidence: 99%

Time Modulated Arrays: From their Origin to Their Utilization in Wireless Communication Systems

Maneiro-Catoira

Bregáins

García-Naya

et al. 2017

Sensors

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Time-modulated arrays (TMAs) are electromagnetic systems whose radiated power pattern is controlled by the application of variable-width periodical pulses to the individual elements. The nonlinear nature of the array operation causes the appearance of radiation patterns at the harmonic frequencies of such periodic pulses. The technique can be used for improving the side-lobe level (SLL) topology of the radiation pattern at the central frequency and/or to profitably exploit the harmonic patterns in order to supply smart antenna capabilities. Among the latter features, the TMA harmonic beamforming takes on special importance due to its attractive trade-off performance-hardware complexity. From this perspective, TMAs are sensors capable of transforming the spatial diversity of a communication channel into frequency diversity, thus improving the performance of a wireless communication. In addition to a walk through the origins of the concept, and a brief analysis of the mathematical fundamentals, this paper organizes the prolific state of the art of TMAs in two major thematic blocks: (1) TMA design from an antenna perspective; and (2) TMA design from a signal processing perspective.

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“…To compensate for these drawbacks, we have developed two main techniques, one based on sparse array (Sparse Time Modulated Array, STMA), cf. [5], and the other based on phase-only synthesis [6]. Both actually rely on the same idea, which is to optimize along the array dimension and no longer along the time dimension.…”

Section: B Application To Radarmentioning

confidence: 99%

Time Modulated Array for dual function radar and communication

Euziere

Guinvarc'H

Hinostroza³

et al. 2015

2015 IEEE International Symposium on Antennas and Propagation &Amp; USNC/URSI National Radio Science Meeting

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International audienceA Time Modulated Array based technique is used to simultaneously do a radar function in the main lobe and a communication function in the side lobes. It uses an averaging to do the radar function, while the communication is done with the variation from an intermediary pattern to another. A 12-antenna array is shown with a stable main lobe for radar application and a variation of the magnitude of the side lobes to perform an Amplitude Modulation at 55° from the main lobe

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Optimization of Sparse Time-Modulated Array by Genetic Algorithm for Radar Applications

Cited by 39 publications

References 5 publications

Time Modulated Array – A Database Approach

Time Modulated Array – A Database Approach

Time Modulated Arrays: From their Origin to Their Utilization in Wireless Communication Systems

Time Modulated Array for dual function radar and communication

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