Results 241 to 250 of about 41,729 (299)

Liquid biopsy in cancer diagnosis and prognosis: a paradigm shift in precision oncology. [PDF]

Front Mol Biosci
Abreu RDS, Ferreira DDP, de Araujo NS, Horita S, Tilli TM, Degrave W, Moreira ADS, Waghabi MC.   +7 more
europepmc   +1 more source

Molecular advances in transfusion medicine: a narrative review. [PDF]

Front Med (Lausanne)
Arishi WA, Yaqinuddin A, Sajid MR.
europepmc   +1 more source

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Spatiotemporal Evolution of Orbital Angular Momentum (OAM) Beams Based on a Uniform Circular Frequency Diverse Array (UC-FDA)

IEEE Transactions on Antennas and Propagation, 2023
Radar imaging based on orbital angular momentum (OAM) beams has become a significant approach to realize high resolution and multidimensional target detection.
Jingcan Ma, Jiazhen Cai, Zhennan Zheng, Xinlu Gao, Shanguo Huang   +4 more
openaire   +2 more sources

A frequency diverse array (FDA) of dispersive lamb waves for grating lobes suppression

Mechanical Systems and Signal Processing
Yanfeng Lang, Zhibo Yang, Zhongqing Su, Qingqing Wang, Xuefeng Chen   +4 more
openaire   +2 more sources

Frequency Diverse Array (FDA) and Phased Array: An Impartial Comparison

IEEE Transactions on Antennas and Propagation
The construction of time-invariant spatial-focusing beampatterns (BPs) using frequency diverse arrays (FDAs) has received significant attention in recent years for secure communications.
M. Fartookzadeh
openaire   +2 more sources

A Low Probability of Intercept Method Based on Power Optimization for Frequency Diverse Array and Cooperative Jammer

IEEE Transactions on Aerospace and Electronic Systems
A radio frequency (RF) stealth method on power optimization is proposed for frequency diverse array (FDA) radar with a cooperative jammer. This method focuses on the collaboration between the FDA radar and the jammer to optimize transmit power during ...
Siyuan Zhang, Hui Chen, Wenkai Jia, Wenqin Wang   +3 more
semanticscholar   +1 more source

A Bayesian-Genetic Hybrid Method for Frequency Diverse Array Transmit Beampattern Optimization

IEEE Sensors Journal
This article proposes a new method to find the optimum frequency offsets (FOs) in a frequency diverse array (FDA) radar transmit beampattern that minimizes the peak sidelobe level (PSLL) and half power beamwidth (HPBW).
Ahmad Bilal, Yash H. Shah, Abdul Hadee, S. Bhattacharjee, Choon Sik Cho   +4 more
semanticscholar   +1 more source

Frequency Diverse Array OFDM Transmit System with Partial Overlap in Frequency

International Symposium on Joint Communications & Sensing
A frequency-diverse array (FDA) is an alternative array architecture in which each antenna is preceded by a mixer instead of a phase shifter. The mixers introduce a frequency offset between signals transmitted by each antenna, resulting in a time-varying
Marcin Wachowiak, A. Bourdoux, Sofie Pollin   +2 more
semanticscholar   +1 more source

Analysis of Beam Pattern Variation Due to Frequency Noise in Frequency Diverse Array Using Cramér–Rao Bound and FDTD

IEEE Sensors Journal
We investigate the influence of frequency noise on the beam pattern within a frequency diverse array (FDA) utilizing the Cramér-Rao lower bound (CRLB). FDA radar offers an ability to adjust the beam pattern with distance as well as angle. This technology
Yunsoo Kim, Youngwook Kim
semanticscholar   +1 more source

Wideband and Flexible Beamforming of Frequency Diverse Array Based on Microwave Photonic Dual-Carrier Signal Generation

IEEE transactions on microwave theory and techniques
In contrast to conventional phased array technology, frequency diverse array (FDA) presents a promising technology for addressing applications sensitive to distance. In order to generate FDA signals with a large bandwidth, as well as to solve the problem
Jiajun Tan, Weile Zhai, Xirui Zhong, Hao Yin, Xiaoyan Pang, Wanzhao Cui, Yongsheng Gao   +6 more
semanticscholar   +1 more source