Results 271 to 280 of about 41,729 (299)

ANN-Assisted Quasi-Time-Invariant Beamforming for Retrodirective Frequency Diverse Array

IEEE Transactions on Antennas and Propagation
Due to the range-angle-dependent beampattern, frequency diverse array (FDA) has attracted extensive attention. However, the inherent time-varying and range-angle coupling problems of the FDA are still troublesome.
Y. Hei, Xiao Yan Ju, Longyuan Ma, W. Li, X. Shi   +4 more
semanticscholar   +1 more source

Photonic-Assisted Frequency Diverse Array

IEEE transactions on microwave theory and techniques
A new microwave photonic signal processor for use in a frequency diverse array (FDA) to generate a dot-shaped beampattern is presented. The microwave photonic signal processor is implemented based on a dual-polarization quadrature phase shift keying (DP ...
Baohang Mo, Jingxu Chen, Chuizhen Li, E. H. Chan, Xudong Wang, Xinhuan Feng, Bai-Ou Guan, Jianping Yao   +7 more
semanticscholar   +1 more source

General Bandwidth Synthesis Approach for Multiresolution SAR Imaging With Frequency Diverse Array

IEEE Transactions on Geoscience and Remote Sensing
Frequency diverse array (FDA) introduces frequency increment across array elements, resulting in increased controllable degrees-of-freedom (DOFs) in spatial and frequency domains.
Keyi Wang, Guisheng Liao, Jingwei Xu, Yanhong Xu, Yuhong Zhang   +4 more
semanticscholar   +1 more source

Target Specific Frequency Selection Criteria for Frequency Diverse Array Radar

IEEE International Conference on Electronics, Computing and Communication Technologies
The frequency diverse array (FDA) radar is based on a new array processing technique having a unique advantage of range-dependent beam formation. The design criteria for frequency components of FDA has been an important area of research.
Venugopal Kulkarni, K. P. Ray, V. A
semanticscholar   +1 more source

The Effect of Coherent Frequency Diverse Array on Watson-Watt Direction-Finding System

2024 4th International Conference on Neural Networks, Information and Communication (NNICE)
Frequency diverse array(FDA) offer potential applications for enhancing the RF safety performance of FDA systems. This is due to the time-varying angle-distance coupling characteristics of the transmit beam map, which are caused by small frequency shifts
Qiang Liu, Kunlai Xiong, Fucheng Guo, Tao Xu   +3 more
semanticscholar   +1 more source

Decoupled Transmit Beampattern Synthesis for Frequency Diverse Array Radar with Nonlinear Frequency Offsets

2024 7th International Conference on Information Communication and Signal Processing (ICICSP)
Frequency diverse array (FDA) radar has more degree of freedom in beamforming and modulation than conventional phased array radar. When the phase points to the fixed direction, the range of interest can also be specified by adjusting the frequencies of ...
Qiushi Chen, Yanyue Yang, Di Yao, Mengxiao Zhao, Chunlei Pang, Xuguang Yang   +5 more
semanticscholar   +1 more source

Ultrasonic nonlinear frequency diverse array: principle and applications

Structural Health Monitoring
In ultrasonic testing, omnidirectional wave propagation presents challenges of nonfocus energy loss and interface interference. Traditional phased array (PA) methods, despite their focusing capabilities, suffer from limitations in energy utilization and ...
Xiaolei Xu, Yanping Zhu, Yiming Wang, Fucai Li, Wensheng Su, Zhigang Xue   +5 more
semanticscholar   +1 more source

Establishing Secure Region for Covert Communication Based on Frequency Diverse Array

2024 IEEE/CIC International Conference on Communications in China (ICCC)
This work investigates the frequency diverse array (FDA)-assisted covert communication system, in which the general beampattern generated by FDA is utilized to establish a secure region for the legitimate user, thereby improving the system’s covert ...
Yiting Zhou, Jinsong Hu, Youjia Chen, Jun Wang, Feng Shu, Zhizhang David Chen   +5 more
semanticscholar   +1 more source

Reduced-dimensional MUSIC Algorithm for Frequency Diverse Array in MIMO Radar System

Asia-Pacific Signal and Information Processing Association Annual Summit and Conference
The paper proposes a reduced-dimensional multiple signal classification (RD-MUSIC) algorithm for frequency diverse array (FDA) multi-input multi-output (MIMO) radar.
Beizuo Zhu, Kazunori Hayashi, Hiroki Mori   +2 more
semanticscholar   +1 more source

Quantum guidelines for solid-state spin defects

Nature Reviews Materials, 2021
Gary Wolfowicz, F Joseph Heremans, Christopher P Anderson   +2 more
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