Results 61 to 70 of about 3,627 (192)
Countermeasure for Interrupted-sampling Repeater Jamming based on Fractional Fourier Transformation
MATEC Web of Conferences, 2018 Today, the interrupted-sampling repeater jamming (ISRJ) has posed a serious threat to LFM radars. In this paper, a countermeasure to suppressing ISRJ based on fractional Fourier transformation (FrFT) is presented.
Liu Ming, Tao Shu, Chen Qingrong
doaj +1 more source
Optical transformation from chirplet to fractional Fourier transformation kernel
, 2009 We find a new integration transformation which can convert a chirplet function to fractional Fourier transformation kernel, this new transformation is invertible and obeys Parseval theorem.
Dirac PAM, Hong-yi Fan, Li-yun Hu
core +1 more source
Using lightweight denoising network to suppress multiple barrage jamming in range‐Doppler domain
IET Radar, Sonar &Navigation, Volume 18, Issue 11, Page 2308-2324, November 2024.To address the issue of single‐channel radar resisting multiple barrage jamming, this paper proposes a novel jamming suppression framework based on range‐Doppler domain denoising. It also proposes a deep denoising network with a lightweight multi‐resolution encoding and decoding structure.
Minghua Wu +5 more
wiley +1 more source
Pseudopolar Format Matrix Description of Near-Range Radar Imaging and Fractional Fourier Transform
Remote SensingNear-range radar imaging (NRRI) has evolved into a vital technology with diverse applications spanning fields such as remote sensing, surveillance, medical imaging and non-destructive testing.
Lilong Zou, Ying Li, Amir M. Alani
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International Journal of Antennas and Propagation, 2020 Synthetic aperture radar (SAR) was originally exploited to image stationary scenes. However, it is important to derive target information of velocity for many applications.
Chao Chen +5 more
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IET Radar, Sonar &Navigation, Volume 18, Issue 10, Page 1691-1709, October 2024.This paper proposes a three‐dimensional interferometric inverse synthetic aperture radar imaging algorithm for the ship targets based on the cubic phase signal (CPS) model. This method approximates the azimuth echo signal as a CPS and utilises the particle swarm optimisation algorithm to estimate the higher order phase coefficients.
Junting Yang, Yong Wang
wiley +1 more source
Spatial correlations in parametric down-conversion
, 2010 The transverse spatial effects observed in photon pairs produced by parametric down-conversion provide a robust and fertile testing ground for studies of quantum mechanics, non-classical states of light, correlated imaging and quantum information.
Monken, C. H. +3 more
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Radar active oppressive interference suppression based on generative adversarial network
IET Radar, Sonar &Navigation, Volume 18, Issue 7, Page 1193-1202, July 2024.An intelligent interference suppression method based on deep learning is proposed. Its interference suppression performance and robustness are better than the existing methods. Abstract Modern radar systems often face various interference signals in complex and rapidly changing electronic environments.
Yongzhi Yu, Yu You, Ping Wang, Limin Guo
wiley +1 more source
Joint estimation of doppler frequency and DOA-DOD based on FRFT in bistatic MIMO radar system
Tongxin xuebao, 2012 A novel method for the joint parameters estimate in the bistatic multiple-input multiple-output (MIMO) radar system was proposed.Firstly,a novel signal model to accurately estimate parameters of the et was proposed.Two Doppler parameters,initial Doppler ...
Li LI, Tian-shuang QIU
doaj +2 more sources
Electronics Letters, Volume 60, Issue 12, June 2024.Our manuscript introduces a novel method that modifies the normalization process in the fractional Fourier transform (FRFT) domain by incorporating a threshold mechanism to counteract the effects of non‐normal distributions. Additionally, we propose a target detection method that utilizes three new features extracted from this modified FRFT domain ...
Jian Guan +5 more
wiley +1 more source