Fast Sidelobe Suppression Based on Two-Dimensional Joint Iterative Adaptive Filtering

Ma, Jin-Yeul; Li, Kun; Tian, Jing; Long, Xingwang; Wu, Siliang

doi:10.1109/taes.2021.3076175

Cited by 13 publications

(2 citation statements)

References 46 publications

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“…Te studies in [25] combines the metasurface with amplitude and phase controllable unit cell, and realize the side-lobe levels suppression of a metasurface lens. Reference [26] proposes a 2D joint iterative adaptive fltering method by adopting the reiterative minimum mean square error (RMMSE) criterion to reduce the side lobe. Some papers consider both the sidelobe reduction and anti-interference performance of the array.…”

Section: Introductionmentioning

confidence: 99%

Side Null Analysis of the Main-Auxiliary Antenna Array for Noncooperative Interference Cancellation

Li,

Zhang,

et al. 2023

International Journal of Antennas and Propagation

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In interference cancellation, the null at the angle of arrival (AoA) of interference can suppress interference. However, due to the large spacing between array elements and the periodicity of the array, some small nulls at the angles of noninterference are formed inevitably. When the AoA of the desired signal is in these small nulls, they impair the effectiveness of interference cancellation by attenuating the desired signal. This paper proposes the concept of a side null to represent these nulls in the noninterference direction. And the cancellation ratio of the desired signal (SCR) is deduced to quantitatively characterize the side null. The spatial noncooperative interference cancellation model based on the main-auxiliary antenna array is established. Based on this, the SCR is derived to evaluate the amount of desired signal attenuation. Then the simulation, respectively, in two-dimensional plane and three-dimensional space, describes the side null visually. Moreover, the method of side null reduction is discussed by modulation of the array. Finally, the existence of side null and its influence on interference cancellation are verified through the experiments. The results of the simulation and experiment are in good agreement, and both support the theoretical analysis.

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Section: Introductionmentioning

confidence: 99%

Side Null Analysis of the Main-Auxiliary Antenna Array for Noncooperative Interference Cancellation

Li,

Zhang,

et al. 2023

International Journal of Antennas and Propagation

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“…L INEAR frequency modulation (LFM) signal is widely used in the modern radar system. Since target detection performance is often adversely affected by the uncertainty of the noise power [1], matched filters (MF) are typically leveraged to improve the signal-to-noise ratio (SNR) without increasing the radar's peak transmitted power [2]. However, high peak sidelobe level (PSL) of MF output tends to cause masking problems between strong and weak targets that come close.…”

Section: Introductionmentioning

confidence: 99%

Optimal Mismatched Filter Design by Combining Convex Optimization With Circular Algorithm

et al. 2022

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Mismatched filters (MMF) have been intensively explored for linear-frequency modulation (LFM) waveform sidelobe reduction. Unlike other design strategies, the use of convex optimization (CO) techniques is able to find the optimal design. However, existing studies for CO-based MMF design have focused on minimizing peak sidelobe level (PSL), which might not take the mainlobe widening sacrifice into account. To address this issue, this paper proposes a weighted CO model targeting a flexible tradeoff between sidelobe suppression and mainlobe widening. Moreover, to better control the optimization problem via the presented CO model, the cyclic algorithm (CA) is employed to determine upper limits on mainlobe width. Consequently, the proposed tradeoff MMF design by combining CA with CO would be feasible to meet the requirements of different target detection scenarios. Comprehensive simulations have been carried out to demonstrate the effectiveness of our presented MMF design.INDEX TERMS Mismatched filter, convex optimization, cyclic algorithm, sidelobe suppression.

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Robust iterative adaptive filtering against intrapulse Doppler shifts

Tian

et al. 2023

Signal Processing

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Fast Sidelobe Suppression Based on Two-Dimensional Joint Iterative Adaptive Filtering

Cited by 13 publications

References 46 publications

Side Null Analysis of the Main-Auxiliary Antenna Array for Noncooperative Interference Cancellation

Side Null Analysis of the Main-Auxiliary Antenna Array for Noncooperative Interference Cancellation

Optimal Mismatched Filter Design by Combining Convex Optimization With Circular Algorithm

Robust iterative adaptive filtering against intrapulse Doppler shifts

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