A5073925011- Direction-of-Arrival Estimation Techniques
- Speech and Audio Processing
- Antenna Design and Optimization
- Radar Systems and Signal Processing
- Advanced Adaptive Filtering Techniques
- Advanced SAR Imaging Techniques
- Advanced Wireless Communication Techniques
- Antenna Design and Analysis
- Indoor and Outdoor Localization Technologies
- Target Tracking and Data Fusion in Sensor Networks
- Advanced Data Compression Techniques
- Microwave Engineering and Waveguides
- Radio Astronomy Observations and Technology
- Advanced Antenna and Metasurface Technologies
- Wireless Communication Networks Research
- Underwater Acoustics Research
- Advanced Steganography and Watermarking Techniques
- Chaos-based Image/Signal Encryption
- Magnesium Alloys: Properties and Applications
- PAPR reduction in OFDM
- Sparse and Compressive Sensing Techniques
- Music and Audio Processing
- Aluminum Alloys Composites Properties
- Error Correcting Code Techniques
- Electromagnetic Simulation and Numerical Methods
Nanjing University of Science and Technology
2015-2024
Baotou Medical College
2024
Inner Mongolia University of Science and Technology
2024
China Electronics Technology Group Corporation
2023
Ningxia Water Conservancy
2021
China University of Petroleum, Beijing
2021
Harbin University of Science and Technology
2012-2019
BOE Technology Group (China)
2018
National Supercomputing Center in Wuxi
2015-2017
Shandong University
2012-2017
An adaptive digital beamforming technique with compressed sensing (CS) for sparse receiving arrays is proposed. Because of the angle sparseness arriving signals, CS theory can be adopted to sample signals. Then, signals from absent elements on antenna aperture reconstructed by using method. Adaptive algorithms are form beam, whose main lobe steered desired direction and nulls directions interference.
The use of the polarization diversity a target signal at polarization-sensitive antenna array can enhance detection and tracking capabilities radar. In this article, manifold separation steering vector modeling technique is used to develop maximum likelihood method for joint direction arrival (DOA) estimation. Manifold incorporate nonideal characteristics (e.g., cross polarization, mutual coupling) into estimation algorithm using calibration measurements. proposed technique, problem...
In this article, an improved real-valued dimension-reduction MUSIC (IRDR-MUSIC) algorithm is proposed for a crossed-dipole array. Initially, conjugate symmetry of the spatial component in manifold vector derived such that two matrices sum and difference covariance are constructed, which consist real imaginary parts complex matrix respectively. However, with information loss would deteriorate performance. Thus, given have identical null space, joint sum–difference combining both includes...
A weighted subspace-constrained minimum variance distortion-less response (WS-MVDR) beamformer is proposed for robustly controlling the peak sidelobe level (PSL) as well shape of adaptive array pattern with stable mainlobe. The weight vector projected onto subspace constructed from steering vectors. norm projection constrained below derived constant value determined by desired PSL. only inequality constraint introduced to conventional MVDR beamformer, resulting in a second-order cone...
Objective Our study aimed to visualize the global status and frontiers in stem cell therapy for spinal cord injury by using bibliometric methodology. Methods Publication citation information related (SCI) studies between 2003 2022 was retrieved from Web of Science Core Collection database. For visualized study, VOS viewer software Graph Pad Prism 9.5 were used perform analysis included data publication number statistics SCI domain. Results A total 6,686 publications retrieved. The USA China...
By applying phase-only technique in array antenna pattern synthesis, arrays can form desired patterns with the use of phase shifters only. A novel synthesis algorithm is proposed for passive phased seeker. This synthesizes main beam through least-squares approximation, thus minimizing errors between actual and beams. The problem be solved by gradient-descent optimization. item suppressing side lobes added to above problem. To obtain a lobe level as low possible, assigns different weights...
The adaptive phase-only beamforming technique is very important for conventional phased array radar to suppress interference. Similar radar, the digital also useful and can be used enhance power by making full use of transmit module microwave each element. In this paper, a algorithm based on semidefinite relaxation proposed. It interference minimizing output maintain desired signal without distortion. weighting converted non-convex quadratic optimization problem, then convex problem (SDR)...
A novel feature extraction algorithm of Inverse Synthetic Aperture Radar (ISAR) image based on wavelet transform (WT) and multi-scale block local binary pattern (MB-LBP) is proposed in this paper. Firstly, the mathematical morphology method adopted to enhance ISAR image. Secondly, 2D used get low frequency sub-band from enhancement Then, divided into small regions which (BLBP) with different weight histograms are extracted concatenated a vector be as an efficient descriptor. At last...
The use of micro-Doppler radar signatures for feature extraction and classification human activities has become a focus recently thanks to the discovering effect. Compared with traditional Doppler radar, LFMCW is able distinguish Multi-objective detect target range. In this paper, we analyze difference between running walking which are based on Boulic model Short Time Fourier Transform (STFT) in time-frequency domain give four features. After that, image processing used extract spectrogram...
Unknown array non-ideal characteristics, including mutual coupling between elements, channel gain/phase errors, and sensor position will degrade the performance of direction finding beamforming. In this letter, we propose an improved maximum likelihood (ML) calibration algorithm to estimate all such characteristics with lower computational complexity faster convergence rate. First a modified formulation ML function is developed avoid matrix inversion in each iteration. Then, damped Newton...
The linear dipole array (LDA) with the same elemental orientation is polarization insensitive and can only perform 1-D direction-of-arrival (DOA) estimation. While by appropriate element rotation, LDA becomes sensitive to has potential 2-D DOA In this article, information perception principle of explored, orientations are optimized for enhanced First, diversity quantified an analytical sensitivity (PS) factor. PS factor larger than zero revealing it capable Then, proven that containing three...