Waveforms for simultaneous SAR and GMTI

Murthy, Vinay; Pillai, Unnikrishna; Davis, Mark E.

doi:10.1109/radar.2012.6212110

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…Although techniques exist to assist in mitigating range-dependent interferences, such as the space-time adaptive processing technique [12][13][14][15][16], they have a high computational cost. On the other hand, the desire for new and more advanced array antennas is driven by the requirements of many emerging applications ranging from multitask radar [17] to radio astronomy [18] and relay communication systems [19,20].…”

Section: Introductionmentioning

confidence: 99%

Frequency Diverse Array Antenna: New Opportunities

Wang

2015

IEEE Antennas Propag. Mag.

216

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Phased-array antennas are known for their capability to electronically steer a beam with high effectiveness, but beam steering is fixed in an angle for all range cells. This paper reviews frequency diverse array (FDA) antennas. Different from a phased array, an FDA uses a small frequency increment, as compared with the carrier frequency, across array elements. The use of a frequency increment generates an array factor that is a function of the angle, the time, and the range, allowing the FDA antenna to transmit the energy over the desired range and angle. In addition to analyzing FDA factor characteristics, this paper investigates FDA potential applications in range-dependent energy control and technical challenges in system implementation, with an aim to call for further investigations on the FDA.

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Section: Introductionmentioning

confidence: 99%

Frequency Diverse Array Antenna: New Opportunities

Wang

2015

IEEE Antennas Propag. Mag.

216

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“…Although many techniques exist that can suppress a range‐dependent interference such as STAP techniques [28, 29] but they increase the computational cost and complexity. Therefore, the desire for more advanced array antennas such as multitask radar [30] to radio astronomy [31] and pursuit to localise and track multiple targets in more than one dimension has come up with a novel beam steering technique exploiting frequency diverse array (FDA) [32].…”

Section: Introductionmentioning

confidence: 99%

Development of frequency diverse array radar technology: a review

Basit

Khan

et al. 2018

IET Radar, Sonar & Navigation

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Diverse, orthogonal waveforms and signal processing architecture for joint GMTI and SAR applications

Majumder

Bell

Rangaswamy

2014

2014 IEEE Radar Conference

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In this research, we introduce a signal processing framework for joint GMTI and SAR algorithms that is based on orthogonal (transmit and receive) waveforms. Traditionally, radar systems are configured to operate either in GMTI or SAR processing mode, but not both simultaneously. This is due to the fact that operational parameters for these two modes are quite different. For example, exoclutter GMTI processing requires a high pulse repetition frequency (PRF), but a high PRF results in increased range ambiguity-and an increased processing burden-in SAR imaging. We propose combining diverse, orthogonal waveforms and introducing corresponding processing techniques to reduce the problems and complexities of joint GMTI and SAR exploitation. For the exoclutter GMTI problem, the necessary high-PRF pulse train will be used to achieve finer Doppler resolution for detecting fast moving objects. For the endoclutter GMTI and SAR imaging problem, we will transmit low PRF pulses. The goal for low PRF pulses for endoclutter GMTI and SAR imaging is to ensure that range ambiguity issue has been addressed. These new approaches will achieve following benefits: (1) accomplish GMTI and SAR processing concurrently by eliminating the complexities associated with reconfiguring a radar system, (2) more efficiently use bandwidth by employing appropriate bandwidth for exoclutter GMTI pulses and SAR image formation pulses, and (3) reduce range ambiguity issue associated with high PRF operation.

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Waveforms for simultaneous SAR and GMTI

Cited by 5 publications

References 8 publications

Frequency Diverse Array Antenna: New Opportunities

Frequency Diverse Array Antenna: New Opportunities

Development of frequency diverse array radar technology: a review

Diverse, orthogonal waveforms and signal processing architecture for joint GMTI and SAR applications

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