Beam Pattern Synthesis for an FDA Radar with Hamming Window-Based Nonuniform Frequency Offset

Basit, Abdul; Qureshi, Ijaz Mansoor; Khan, Wasim; Rehman, Saifur; Khan, Muhammad Ahsan

doi:10.1109/lawp.2017.2714761

Cited by 110 publications

(85 citation statements)

References 9 publications

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“…In (6), the term e jφ n is exploited to steer the direction of the radiation peak. Different with those in previous works, for example, Basit et al, 10 here, the e jφ n is designed as…”

Section: Log-rfda Transmit Beampatternmentioning

confidence: 99%

“…• Low complexity at the transmitter end, since each element employs only a single carrier logarithmic offset and frequency offset optimization is not required. • The time-range relationship is considered, which has been overlooked in some previous works, for example, Basit et al 10 • The produced thumbtack-like beampattern is much more concentrated, that is, the energy distribution surrounding the target location is much lower than the peak. • The range resolution and side lobe suppression of the produced beampattern are enhanced without consuming additional bandwidth, for example, when the identical maximum bandwidth 20.794 kHz is adopted in different transmitter schemes, the proposed log-RFDA has a better target resolution compared with the log-FDA.…”

Section: Introductionmentioning

confidence: 99%

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Frequency diverse array with random logarithmically increasing frequency offset

Huang

Ding

Ouyang

et al. 2020

Micro & Optical Tech Letters

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The frequency diverse arrays (FDAs) have been extensively investigated since it can provide a unique anglerange-dependent beampattern. This range-dependent characteristic can suppress the range ambiguous clutters, leading to many novel potential Radar applications. Two issues, however, exist in conventional FDA (CFDA) beampatterns, that is, range-angle coupling and range periodicity. Therefore, for a CFDA Radar, target range information cannot be obtained directly from the beampattern peaks and target ambiguity occurs in the range domain. In this work, a new frequency diverse array (FDA) transmitter architecture with random logarithmically increasing frequency offset (log-RFDA) is presented. It is shown that the proposed strategy provides a nonperiodic thumbtack-like beampattern, eliminating the ambiguity in range domain, suffered in the CFDA Radar. Furthermore, reduced side lobe and higher detection resolution can be achieved, compared with the previously reported log-FDA. K E Y W O R D Sfrequency diverse arrays, higher detection resolution, nonperiodic thumbtacklike beampattern, random logarithmically increasing frequency offset

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“…In (6), the term e jφ n is exploited to steer the direction of the radiation peak. Different with those in previous works, for example, Basit et al, 10 here, the e jφ n is designed as…”

Section: Log-rfda Transmit Beampatternmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Frequency diverse array with random logarithmically increasing frequency offset

Huang

Ding

Ouyang

et al. 2020

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…Therefore, it will produce many peaks at the same time, which causes difficulties in range-angle localization and jamming suppression. To create a decoupled dot-shaped beampattern in range-angle dimensions, the FDA frameworks using logarithmically increasing frequency offset and Hamming window-based frequency offset are proposed in [18,19], respectively. Whether the frequency offsets of these methods are symmetric or not, the essence of both of them is that the nonlinear frequency offset can result in an unusual beampattern which we can make full use of.…”

Section: Beampattern Designmentioning

confidence: 99%

“…Many studies about FDA have been presented in recent years [8][9][10][11][12][13][14][15][16][17]. Many researchers take their exploration in getting rid of the disadvantages of FDA beampattern such as range-angle coupling [18][19][20] and time-variant [21,22]. Taking use of the range-angle property, many methods are proposed for the FDA in range-angle two-dimensional localization [23,24] and mainlobe deceptive jamming suppression [25,26].…”

Section: Introductionmentioning

confidence: 99%

“…In [18], a new FDA scheme with logarithmically increasing frequency offset is proposed, and the target can be located at a single maximum. A uniformly spaced symmetric FDA with nonuniform frequency offsets is proposed to form a range-angle-decoupled beampattern [19]. By employing particle swarm optimization algorithm to optimally determine the frequency offsets and element spacing, a pencil beampattern design approach is proposed, which also has lower sidelobes in range-angle dimensions [20].…”

Section: Introductionmentioning

confidence: 99%

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FDA-MIMO Beampattern Synthesis with Hamming Window Weighted Linear Frequency Increments

Tan

Wang

Yuan

et al. 2020

International Journal of Aerospace Engineering

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By utilizing a tiny frequency increment across the array elements, frequency diverse array (FDA) generates a beampattern possessing the property of range-angle-dependent. However, the beampattern of the conventional FDA is "S"-shaped, which means it is coupled in range-angle domains, resulting in low target indication accuracy and poor jamming suppression ability. In this paper, taking advantage of multiple-input multiple-output (MIMO) technique and multiple matched filters, a new FDA framework using Hamming window weighted linear frequency increments is proposed. Correct FDA-MIMO framework and multiple matched filters are used to remove the influence of the time parameter. A range-angle-decoupled beampattern with sharp pencil-shaped mainlobe and low sidelobe levels can be produced. Comparing with the existing FDA-decoupled transmit beampattern design methods, a more focusing beampattern can be achieved. Simulation results validate the superiority of the proposed system.

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Range‐angle beamforming with frequency diverse array radar using irregular superposed multicarrier approach for target indication

Tan

Dai

Wang

et al. 2021

Int J RF Microw Comput Aided Eng

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Due to the rapid progress of electronic countermeasures in the radar area, it is urgent to meet the demand of novel technologies that possess more possibilities for precise target indication without the influence of mainlobe jamming.Recently, frequency diverse array (FDA) steals the spotlight due to its property of range-angle-dependent beamforming. Besides, the multicarrier methods are also presented to generate range-dependent beampattern. In this paper, a novel multicarrier approach is proposed based on FDA radar, namely, irregular superposed multicarrier approach. Pencil-shaped range-angle beampattern can be generated. Moreover, in the equal amount of frequency components, our proposed scheme outperforms the existing multicarrier FDA systems considering four aspects of performance. Simulations and comparative results validate the superiority of the proposed scheme.

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Beam Pattern Synthesis for an FDA Radar with Hamming Window-Based Nonuniform Frequency Offset

Cited by 110 publications

References 9 publications

Frequency diverse array with random logarithmically increasing frequency offset

Frequency diverse array with random logarithmically increasing frequency offset

FDA-MIMO Beampattern Synthesis with Hamming Window Weighted Linear Frequency Increments

Range‐angle beamforming with frequency diverse array radar using irregular superposed multicarrier approach for target indication

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