Results 21 to 30 of about 519,811 (291)

Beampattern analysis of frequency diverse array radar: a review

EURASIP Journal on Wireless Communications and Networking, 2021
Electronic beam steering is an essential feature of state-of-the-art radar systems. Conventional phased array (PA) radars with fixed carrier frequencies are well-known for electronically steering their beam with high directivity.
Zeeshan Ahmad, Meng Chen, Shu-Di Bao
doaj   +1 more source

Accurate Theoretical Models for Frequency Diverse Array Based Wireless Power Transmission

Energies, 2022
Wireless power transfer (WPT) is a well-known problem, and has received wide attention in the next generation industrial applications and consumer electronics. On the other hand, frequency diverse array (FDA) is a new concept with the ability to generate
Zeeshan Ahmad, Zhonghan Wang, Zain ul Abidin Jaffri, Shudi Bao   +3 more
doaj   +1 more source

Frequency of occurrence of numbers in the World Wide Web [PDF]

, 2005
The distribution of numbers in human documents is determined by a variety of diverse natural and human factors, whose relative significance can be evaluated by studying the numbers' frequency of occurrence.
Albert, Argollo de Menezes, Argollo de Menezes, Bak, Barabási, Benford, Cowan, Dorogovtsev, Huberman, Huberman, J.F.F. Mendes, J.G. Oliveira, Landau, Mandelbrot, Miller, Newcomb, Pietronero, Raimi, Raimi, S.N. Dorogovtsev, Simon, Willis, Yule, Zipf   +23 more
core   +1 more source

Range-Ambiguous Clutter Suppression via FDA MIMO Planar Array Radar with Compressed Sensing

Remote Sensing, 2022
Range-ambiguous clutter is an inevitable issue for airborne forward-looking array radars, especially with the high pulse repetition frequency (PRF). In this paper, a method to suppress the range-ambiguous clutter is proposed in an FDA-MIMO radar with a ...
Yuzhuo Wang, Shengqi Zhu, Lan Lan, Ximin Li, Zhixin Liu, Zhixia Wu   +5 more
doaj   +1 more source

Beampattern Optimization for Frequency Diverse Array With Sparse Frequency Waveforms

IEEE Access, 2017
Multiple-input multiple-output (MIMO) radar equipped with a frequency diverse array (FDA) can produce a range-dependent beampattern and increase the degrees-of-freedom of the antenna array.
Chaoyun Mai, Songtao Lu, Jinping Sun, Guohua Wang   +3 more
doaj   +1 more source

Range-Angle-Dependent Beamforming by Frequency Diverse Array Antenna

International Journal of Antennas and Propagation, 2012
This paper proposes a range-angle-dependent beamforming for frequency diverse array (FDA) antenna systems. Unlike conventional phased-array antenna, the FDA antenna employs a small amount of frequency increment compared to the carrier frequency across ...
Wen-Qin Wang, Huaizong Shao, Jingye Cai
doaj   +1 more source

Frequency Diversity Array for Near-Field Focusing [PDF]

Electronics, 2020
In this study, a numerical optimization method is proposed to achieve the near-field focusing of square arrays and circular arrays. This method introduced the frequency diversity array (FDA) approach to change the initial amplitude and working frequency.
Xu Han, Shuai Ding, Yongmao Huang, Yuliang Zhou, Huan Tang, Bingzhong Wang   +5 more
openaire   +1 more source

An Overview of Frequency Diverse Array Radar Technology

Leida xuebao, 2018
The carrier frequencies of array elements in a Frequency Diverse Array (FDA) radar are slightly distinguished, leading to a range-angle-time-dependent transmit beampattern. Thus, an FDA radar carries additional information in a certain range and provides
Xu Jingwei, Zhu Shengqi, Liao Guisheng, Zhang Yuhong   +3 more
doaj   +1 more source

Frequency Diversity Array for DOA Estimation

Mehran University Research Journal of Engineering and Technology, 2017
The localization of targets has been presented in this article. DOA (Direction of Arrival) is an important parameter to be determined by radar. The MLE (Maximum Likelihood Estimator) has been widely used to accurately and efficiently estimate the DOAs of multiple targets.
NAUMAN ANWAR BAIG, MOHAMMAD BILAL MALIK, MUHAMMAD ZEESHAN   +2 more
openaire   +3 more sources

Planar frequency diverse array receiver architecture [PDF]

2012 IEEE Radar Conference, 2012
In this paper, we extend the beamforming theory for frequency diverse arrays (FDA) to planar array geometries and give spatial pattern snapshots from the transmit and receive aspects. This is a natural extension of linear FDA work. Prior to this paper, FDA has only been discussed as either a linear array on transmit or with a receive processing chain ...
A. M. Jones, B. D. Rigling
openaire   +1 more source