Two-dimensional pulse-to-pulse canceller of ground clutter in airborne radar

Li, X.-M.; Feng, Da‐Zheng; Liu, H.-W.; Xing, Mengdao; Luo, Dehan

doi:10.1049/iet-rsn:20080108

Cited by 10 publications

(4 citation statements)

References 21 publications

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“…This feature is conducive to the subsequent GMTI. Thus, given the tradeoff between performance and efficiency, NSCC can be also used as a pre‐processing step for STAP when necessary [23].…”

Section: Proposed Methods Description and Discussionmentioning

confidence: 99%

Non‐adaptive space‐time clutter canceller for multi‐channel synthetic aperture radar

Chen

Zhang

Zhou

et al. 2019

IET signal process.

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A non-adaptive space-time clutter canceller (NSCC) for multi-channel (MC) synthetic aperture radar (SAR) was proposed. First, a new three-part range equation was derived on the basis of the two-dimensional Taylor series expansion. Then, each part of the model was analysed. By compensating of the high-order coupling part and the compression of the Doppler extension part of the derived equation, the interlaced signal of a moving target and a clutter patch was easily separated in a space-time domain. The clutter signal in different pulses only contained a constant phase difference. Using radar parameters, the authors constructed a non-adaptive clutter canceller that prevented traditional space time adaptive processing (STAP) issues, such as secondary sample support, computational complexity burden, and unknown moving target information. Compared with the representative non-adaptive method, that is displaced phase centre antenna (DPCA), NSCC is robust to a small degree of parameter error. It can be applied when DPCA condition is not satisfied. The effectiveness of the proposed method was validations through simulation.

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Section: Proposed Methods Description and Discussionmentioning

confidence: 99%

Non‐adaptive space‐time clutter canceller for multi‐channel synthetic aperture radar

Chen

Zhang

Zhou

et al. 2019

IET signal process.

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“…For example, the distribution of the ground clutter in the azimuth-Doppler domain can be determined in advance when the platform velocity and the crab angle, which can be obtained by the inertial navigation system (INS) and global positioning system (GPS), combined with radar operating parameters are known. References [34,35] brought forward the method of twodimension pulse-pulse canceller (TDPC) of ground clutter based on this kind of prior knowledge, which is verified to be an effective clutter suppression method for airborne radar.…”

Section: Introductionmentioning

confidence: 99%

The Robust Ground Clutter Canceller Based on Inaccurate Prior Knowledge in Airborne Radar

Dang

Zhou

2021

Mathematical Problems in Engineering

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Two-dimensional pulse-to-pulse canceller (TDPC) of ground clutter can effectively suppress the clutter along the clutter trace, and therefore the moving target detectability of the following space-time adaptive processing (STAP) algorithm can be improved after TDPC as the clutter prefilter. However, TDPC may greatly impair the energy of moving target when inaccurate knowledge is exploited, which is detrimental to target detection. Aiming at this problem, a robust two-dimensional pulse-to-pulse canceller (RTDPC) of ground clutter is proposed. In order to enhance the TDPC’s robustness with inaccurate radar system parameters, which are mainly the platform velocity and crab angle, the errors of estimated platform velocity and crab angle are taken as the prior knowledge and added into the design of the clutter filter coefficient matrix. By exploiting RTDPC as the clutter prefilter, the moving target detectability of the following nonadaptive detection algorithm or STAP algorithm can also be enhanced. The simulated and MCARM data are utilized to verify the clutter suppression performance of RTDPC with inaccurate platform velocity and crab angle.

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“…Due to the dynamics of the platform and ground clutter, the received signal is slightly distorted, which can be modeled by considering the Doppler frequency shift. Since the range-Doppler (RD) map clearly shows the Doppler frequencies, RD-processing is crucial in many radar applications, including a synthetic aperture radar (SAR) [6] and a moving target indicator [7]. Hence, the modeling of the radar echo signal in a time-domain is required when considering the effect of all the aforementioned factor's needed to generate an accurate RD map.…”

Section: Introductionmentioning

confidence: 99%

Modeling of Monopulse Radar Signals Reflected from Ground Clutter in a Time Domain Considering Doppler Effects

Nam

Rim

Lee

et al. 2020

J Electromagn Eng Sci

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To evaluate the performance of a monopulse radar system, it is necessary to accurately model radar return signals from the ground surface in a time domain. In this paper, we propose a numerical method to model these return signals including radar radio frequency specifications, such as the pulse repetition interval, frequency, and polarization, as well as the antenna geometry, the ground clutter backscattering characteristics, and so on. The Doppler effect is also incorporated into the signal generation scheme because of the dynamics of the platform/clutter and the antenna orientation. The Doppler frequency shift caused by the ground clutter is modeled by employing the time correlation of the received signals. In some scenarios, the monopulse signals are generated and numerically examined. For real radar application, the effect of the platform’s roll stabilization on the monopulse signals is investigated based on the proposed signal generation scheme.

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Two-dimensional pulse-to-pulse canceller of ground clutter in airborne radar

Cited by 10 publications

References 21 publications

Non‐adaptive space‐time clutter canceller for multi‐channel synthetic aperture radar

Non‐adaptive space‐time clutter canceller for multi‐channel synthetic aperture radar

The Robust Ground Clutter Canceller Based on Inaccurate Prior Knowledge in Airborne Radar

Modeling of Monopulse Radar Signals Reflected from Ground Clutter in a Time Domain Considering Doppler Effects

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