Results 41 to 50 of about 467 (179)

Efficient Coherent Integration Based on RDT‐SCFT‐KT for Manoeuvring Target With Doppler Ambiguity

IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.
An efficient method based on RDT‐SCFT‐KT is proposed for effective coherent integration of an accelerated manoeuvring target with Doppler ambiguity. The proposed approach exhibits low computational complexity without requiring parameter searching process.
Zeyu Xu, Gongjian Zhou
wiley   +1 more source

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

An Interrupted Sampling Repeater Jamming Suppression Algorithm Combines Grey Entropy With Multidimensional Filtering

IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.
To effectively suppress ISRJ, the paper proposes an ISRJ suppression algorithm combines grey entropy with multidimensional filtering. Compared with the same type of algorithms, the proposed algorithm demonstrates improved interference suppression performance under low signal‐to‐noise ratio (SNR) or high jamming‐to‐signal ratio (JSR) conditions ...
Jun Luo, Hui Chen, Weijian Liu, Binbin Li, Pei Tian, Haoyang Wang   +5 more
wiley   +1 more source

Ship Velocity Estimation in Airborne Along-Track Interferometric SAR Imagery Based on the Fractional Fourier Transform

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, Yan Li, Kuihua Huang, Yonghong Long, Linlin Zhang, Kewei Ouyang   +5 more
doaj   +1 more source

A Feature Extraction Method of Early Faults of Rolling Bearings Based on Adaptive Feature Mode Decomposition and Nonconvex Overlapping Group Sparsity

Shock and Vibration, Volume 2025, Issue 1, 2025.
The strong background noise largely interferes with the feature extraction results of early faults of rolling bearings and the number of decomposed modes in the feature mode decomposition (FMD) algorithm depends on empirical selection. An overlapping group sparsity (OGS) method has an unsatisfactory performance in noise reduction.
Junhong Wang, Changjie Xu, Liting Wang, Jianguo Luo, Juanjuan Li, Jun Ding, Arcanjo Lenzi   +6 more
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

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, Yupei Lin, Dongyang Cheng, Dan Song, Bin Rao, Wei Wang   +5 more
wiley   +1 more source

Performance Improvement by FRFT-OFDM for Visible Light Communication and Positioning Systems

Photonics
In indoor visible light communication (VLC) and visible light positioning (VLP) systems, the performance of conventional orthogonal frequency-division multiplexing (OFDM) schemes is often compromised due to the nonlinear characteristics and limited ...
Wenyang Li, Zixiong Wang, Jinlong Yu
doaj   +1 more source

Three‐dimensional interferometric inverse synthetic aperture radar imaging of ship target based on cubic phase signal model

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

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