Results 11 to 20 of about 927 (180)
Frontiers in Physics, 2022 In this article, we combine the frequency diverse array (FDA) with the vortex electromagnetic wave theory and propose a beamforming method in the generation of range-time-dependent orbital angular momentum (OAM) based on the circular FDA (CFDA).
Jiaang Ge, Junwei Xie
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Optimal Design of OFDM Radar Low Sidelobe Waveform Based on Genetic Algorithm [PDF]
Hangkong bingqi, 2021 Radar system environment is complex, and excessively high range sidelobes will cause weak targets to be lost and false targets. To solve this problem, a novel orthogonal frequency-division multiplexing(OFDM) radar low sidelobe waveform design method ...
Zhao Jinshan, Quan Yinghui, Liu Daijun, Zhang Rui, Xing Mengdao
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Sidelobe Suppression for Robust Capon Beamforming With Mainlobe-to-Sidelobe Power Ratio Maximization [PDF]
IEEE Antennas and Wireless Propagation Letters, 2012 High sidelobe level is a major disadvantage of the Capon beamforming. To suppress the sidelobe, this paper introduces a mainlobe to sidelobe power ratio constraint to the Capon beamforming. it minimizes the sidelobe power while keeping the mainlobe power constant. Simulations show that the obtained beamformer outperforms the Capon beamformer.
Yipeng Liu 0001, Qun Wan
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Spatially variant apodisation for sidelobe suppression in near range radar imagery
IET Radar, Sonar & Navigation, 2022 High sidelobes greatly reduce the quality of radar imageries. Under the near range condition, sidelobe suppression becomes more intractable due to the space‐variant characteristic of the wavenumber spectrum. The Spatially variant apodisation (SVA) method
Rongqiang Zhu, Jianxiong Zhou, Qiang Fu
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Remote Sensing, 2022 Circular ground-based SAR (GBSAR) is a new 3D imaging GBSAR with the potential of acquiring high-quality 3D SAR images and 3D deformation. However, its donut-shaped spectrum and short radius of antenna rotation cause high sidelobes on 3D curved surfaces,
Qiming Zhang +3 more
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Sidelobe Suppression in OFDM Systems [PDF]
, 2006 In this contribution, we develop a method for reducing out-of-band emis- sion caused by high sidelobes in OFDM systems. The method is termed multiple-choice sequences (MCS) and operates in the frequency domain of an OFDM system. The principle of MCS is to map the original trans- mission sequence onto a set of sequences and to choose, from this set, a ...
Cosovic, Ivan +1 more
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Joint Precoder and Window Design for OFDM Sidelobe Suppression
IEEE Communications Letters, 2022 Agencia Estatal de Investigación | Ref.
Khawar Hussain, Roberto López-Valcarce
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Millimetre-Wave Planar Phased Patch Array with Sidelobe Suppression for High Data-Rate Transmission
International Journal of Antennas and Propagation, 2019 A design of 38 GHz planar phased patch array with sidelobe suppression for data-rate enhancement is proposed in the paper. The proposed array is formed of three 24-element subarrays of patches.
Hung-Chen Chen +2 more
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Side Lobe Suppression in NC-OFDM Systems Using Variable Cancellation Basis Function
IEEE Access, 2017 In non-continuous orthogonal frequency division multiplexing (NC-OFDM)-based cognitive radio system, the sidelobe suppression methods use the fixed length rectangular windowing functions for canceling carriers (CCs) like the extended active interference ...
Shaik Yasmin Fathima +4 more
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Sidelobe Suppression with Null Steering by Independent Weight Control
International Journal of Antennas and Propagation, 2015 A uniform linear array of n antenna elements can steer up to n-1 nulls. In situations where less than n-1 nulls are required to be steered, the existing algorithms have no criterion to utilize the remaining weights for sidelobe suppression.
Zafar-Ullah Khan +4 more
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