Results 1 to 10 of about 773,448 (292)

Kernel Function-Based Ambiguity Function and Its Application on DOA Estimation in Impulsive Noise [PDF]

Sensors, 2022
To solve the problem that the traditional ambiguity function cannot well reflect the time-frequency distribution characteristics of linear frequency modulated (LFM) signals due to the presence of impulsive noise, two robust ambiguity functions ...
Yuzi Dou, Sen Li
doaj   +2 more sources

Optimized Design of Sparse Antenna Array for 2D Subarrays Based on GA-PSO Algorithm and Ambiguity Function [PDF]

Micromachines
A sparse antenna array of subarrays can effectively reduce the digital channels of array antennas, system complexities, and hardware cost while simultaneously increasing the antenna aperture.
Jian Yang, Jian Lu, Tong Zhu, Chuanxiang Li, Yinghui Quan   +4 more
doaj   +2 more sources

Sequence Set Design for a New LFM-PC Hybrid Modulated Radar Signal

Sensors, 2021
In this paper we study the code design problem of a new form of linear frequency modulation phase-coded (LFM-PC) hybrid signal with wide Doppler tolerance based on a range-Doppler discrete ambiguity function (DAF) to get better detection performance and ...
Shiyi Li, Yuying Wang, Jindong Zhang, Daiyin Zhu   +3 more
doaj   +1 more source

Dynamic Optimization Method for Broadband ADCP Waveform with Environment Constraints

Sensors, 2021
Broadband acoustic Doppler current profiler (ADCP) is widely used in agricultural water resource explorations, such as river discharge monitoring and flood warning.
Yongshou Yang, Shiliang Fang
doaj   +1 more source

Wigner-Ville distribution and ambiguity function associated with the quaternion offset linear canonical transform

Demonstratio Mathematica, 2022
Wigner-Ville transform or Wigner-Ville distribution (WVD) associated with quaternion offset linear canonical transform (QOLCT) was proposed by Bhat and Dar. This work is devoted to the development of the theory proposed by them, which is an emerging tool
Bhat Mohammad Younus, Almanjahie Ibrahim M., Dar Aamir H., Dar Javid G.   +3 more
doaj   +1 more source

On the Analysis of PM/FM Noise Radar Waveforms Considering Modulating Signals with Varied Stochastic Properties

Sensors, 2021
Noise Radar technology is the general term used to describe radar systems that employ realizations of a given stochastic process as transmit waveforms. Originally, carriers modulated in amplitude by a Gaussian random signal, derived from a hardware noise
Leandro Pralon, Gabriel Beltrao, Alisson Barreto, Bruno Cosenza   +3 more
doaj   +1 more source

Performance Evaluation of Photonics-Based Coherent MIMO Radar Systems for Maritime Surveillance

Inventions, 2023
Multiple-input multiple-output (MIMO) radars offer significant advantages over conventional standalone radars in terms of target detection and localization capabilities.
Malik Muhammad Haris Amir, Salvatore Maresca, Gaurav Pandey, Antonio Malacarne, Antonella Bogoni, Mirco Scaffardi   +5 more
doaj   +1 more source

A radar waveform recognition method based on ambiguity function generative adversarial network data enhancement under the condition of small samples

IET Radar, Sonar & Navigation, 2023
This study proposes a small sample recognition method for radar waveforms based on data enhancement of ambiguity function generative adversarial networks (AFGAN) to address the issue of low recognition rate and unbalanced class recognition rate.
Haijun Wang, Tao Hu, Zhongfu Xu, Di Wu, Huanyao Dai, Pinpin Lv, Yage Zhang, Zewen Wang   +7 more
doaj   +1 more source

Experimental Results of Underwater Acoustic Communication with Nonlinear Frequency Modulation Waveform

Sensors, 2021
In this paper, we propose underwater acoustic (UWA) communications using a generalized sinusoidal frequency modulation (GSFM) waveform, which has a distinct ambiguity function (AF) and correlation function characteristic.
Jeongha An, Hyungin Ra, Changhyun Youn, Kiman Kim   +3 more
doaj   +1 more source

System Design and Target Detection Experiments for LTE-based Passive Radar

Leida xuebao, 2020
This article presents experimental results of target detection using a miniaturized multichannel passive radar system that exploits Long Term Evolution (LTE) signals.
Xianrong WAN, Tongtong LIU, Jianxin YI, Yangpeng DAN, Xiaokai HU   +4 more
doaj   +1 more source