Results 51 to 60 of about 166,227,951 (129)

On a Closer Look of a Doppler Tolerant Noise Radar Waveform in Surveillance Applications

Sensors
The prevalence of Low Probability of Interception (LPI) and Low Probability of Exploitation (LPE) radars in contemporary Electronic Warfare (EW) presents an ongoing challenge to defense mechanisms, compelling constant advances in protective strategies ...
Maximiliano Barbosa, Leandro Pralon, Antonio L. L. Ramos, José Antonio Apolinário   +3 more
doaj   +1 more source

Cognitive MIMO Frequency Diverse Array Radar with High LPI Performance

International Journal of Antennas and Propagation, 2016
Frequency diverse array (FDA) has its unique advantage in realizing low probability of intercept (LPI) technology for its dependent beam pattern. In this paper, we proposed a cognitive radar based on the frequency diverse array multiple-input multiple ...
Ling Huang, Kuandong Gao, Zhiming He, Jingye Cai   +3 more
doaj   +1 more source

IUDR‐Net: Improved U‐Lite Denoising and Recognition Network for Automatic Modulation Recognition of LPI Radar Signals

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper introduces a novel AMR method named IUDR‐Net to address the challenge of poor recognition accuracy under low SNR conditions. The method first employs the improved U‐Lite network to suppress the impact of noise effectively and then adopts the ResNet18‐1D network to perform the AMR task efficiently.
Haikun Fang, Shiwen Chen, Li Zhang, Chaopeng Wu, Gangyin Sun   +4 more
wiley   +1 more source

A Method for Open‐Set Recognition of LPI Radar Signal Modulation Based on MGPL

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper introduces the multiple Gaussian prototypes learning (MGPL) method to address the automatic modulation open set recognition (AMOSR) problem for Low Probability of Intercept (LPI) radar signals. The method assigns multiple Gaussian prototypes to each known class and achieves effective representation in the latent feature space through the ...
Haikun Fang, Shiwen Chen, Kaibin Zhang, Aofeng Du, Rui Yuan   +4 more
wiley   +1 more source

A Two‐Stage Genetic Algorithm for Joint Optimization of PAPR and PSLR for Precise Signal Reconstruction in OFDM‐ISAC Systems

IET Communications, Volume 20, Issue 1, January/December 2026.
This paper presents a two‐stage genetic algorithm based waveform design framework for OFDM integrated sensing and communication (ISAC) systems. In Stage‐1, a multi‐objective genetic algorithm jointly optimizes the peak‐to‐average power ratio (PAPR) and peak sidelobe level ratio (PSLR) under forward error correction and reserved subcarrier constraints ...
Haidong Xu, Zhanya Li, Xiaoxiao Zhuo, Guyue Zhu, Chenfeng Xu, Liang Tang, Yu Zhao   +6 more
wiley   +1 more source

Low probability of intercept (LPI) free-space optical communication with wavelength diversity in strong atmospheric turbulence regime

Optics Express
In physical-layer security and cryptography we are concerned with the security of the transmitted data, while in low probability of intercept (LPI) communication with protecting the privacy of the end users. In our recent publications related to LPI communications and radars over free-space optical (FSO) links we proposed to hide the constant-amplitude
Vijay Nafria, Ivan B. Djordjevic
openaire   +1 more source

Sig2text: A Vision‐Language Model for Non‐Cooperative Radar Signal Parsing

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
We propose Sig2text, a symbolic radar signal recognition and parameter estimation framework that treats waveform analysis as a parsing task using a vision‐language model. By integrating time‐frequency representations with a context‐free grammar and transformer‐based architectures, Sig2text accurately identifies complex modulation types and estimates ...
Jun‐Yu Yuan, Si‐Yuan Chen, Shu‐Jian Yao, Rong Zhang, Han Cong Feng, Kai‐li Jiang, Yu‐Xin Shang, Yu‐Xin Zhao, Bin Tang   +8 more
wiley   +1 more source

LPI Sequences Optimization Method against Summation Detector Based on FFT Filter Bank

Remote Sensing
Waveform design is a crucial factor in electronic surveillance (ES) systems. In this paper, we introduce an algorithm that designs a low probability of intercept (LPI) radar waveform. Our approach directly minimizes the detection probability of summation
Qiang Liu, Fucheng Guo, Kunlai Xiong, Zhangmeng Liu, Weidong Hu   +4 more
doaj   +1 more source

Radar signal recognition exploiting information geometry and support vector machine

IET Signal Processing, 2023
Aiming at the recognition of low‐probability‐of‐intercept (LPI) radar signals, a support vector machine (SVM)‐based algorithm is proposed, where the information geometry theory is utilised to optimise the kernel function of the SVM.
Yuqing Cheng, Muran Guo, Limin Guo
doaj   +1 more source

WFH: A Wideband Frequency Hopping‐Based Anti‐Jamming Navigation Signal Structure

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
Given the limitations of existing satellite navigation signals in antijamming performance amid growing environmental jamming, this paper proposes a navigation signal structure based on wideband frequency hopping (WFH) modulation to enhance both antijamming capability and measurement accuracy. It further introduces the nonstationary effective carrier‐to‐
Chenyang Wang, Yihai Liao, Sicong Liu, Jianghong Shi, Ao Peng   +4 more
wiley   +1 more source