Results 241 to 250 of about 5,461,422 (271)
Some of the next articles are maybe not open access.
Spatial and directional modulation with random frequency diverse array
2018 IEEE 8th Annual Computing and Communication Workshop and Conference (CCWC), 2018A novel spatial and directional modulation (SDM) method is proposed for enhancing the physical layer security of traditional directional modulation (DM) in the context of random frequency diverse array (RFDA). The novelty of the proposed method is that the concept of spatial modulation (SM) is combined to increase the robustness against the distributed
Xing Wei +4 more
openaire +2 more sources
Comparison of Frequency Diverse Array Patterns with Nonuniform Frequency Offset
2020 IEEE MTT-S International Wireless Symposium (IWS), 2020Frequency Diverse Array (FDA) radar is a new type of radar technology proposed in recent years. It generates a range-dependent beampattern through a small frequency increment among the antenna elements, which overcomes the weakness of phased-array in this respect, so it has many potential applications.
Lihua Zhang +3 more
openaire +1 more source
Spatially resolving antenna arrays using frequency diversity
Journal of the Optical Society of America A, 2016Radio imaging devices and synthetic aperture radar typically use either mechanical scanning or phased arrays to illuminate a target with spatially varying radiation patterns. Mechanical scanning is unsuitable for many high-speed imaging applications, and phased arrays contain many active components and are technologically and cost prohibitive at ...
Daniel L, Marks +2 more
openaire +2 more sources
Cognitive frequency offset calculation for frequency diverse array radar
2015 12th International Bhurban Conference on Applied Sciences and Technology (IBCAST), 2015Frequency diverse array (FDA) radars have the ability to generate a beam pattern that is a function of range angle and time. The wavy beam pattern can be controlled by using a suitable frequency increment applied at the input of the array elements. Instead of using fixed frequency increment for FDA, we propose a cognitive frequency offset calculation ...
A. Basit +3 more
openaire +1 more source
Frequency Diverse Array Information Geometry Analysis
2020 14th European Conference on Antennas and Propagation (EuCAP), 2020Different classic phased-array that generates only angle-dependent transmit beampattern, frequency diverse array (FDA) offers both angle-dependent and range-dependent transmit beampattern. This paper adopts the information geometry theory to study the fundamental information resolution for a general FDA radar system.
Haifeng Yu +5 more
openaire +1 more source
Adaptive Frequency Offset Selection in Frequency Diverse Array Radar
IEEE Antennas and Wireless Propagation Letters, 2014Frequency diverse array (FDA) can provide a range-angle-dependent beam that can be controlled by using a frequency increment between adjacent elements, but the frequency increment is fixed in a basic FDA, which restraints the performance improvement in different environments significantly.
null Huaizong Shao +3 more
openaire +1 more source
Adaptive and diversity arrays for frequency-hopping systems
MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341), 2003The performance of an adaptive array is compared with that of an ideal diversity array for frequency-hopping systems in a mobile peer-to-peer communication network. Both independent and completely correlated Rayleigh fading at the antennas are examined.
D. Torrieri, K. Bakhru
openaire +1 more source
2012
Electronic scanning is the most desirable feature of state-of-the-art radar systems. With electronic scanning, it is possible to steer the main beam of an array antenna instantaneously into a desired direction where no mechanical mechanism is involved in the scanning process.
openaire +1 more source
Electronic scanning is the most desirable feature of state-of-the-art radar systems. With electronic scanning, it is possible to steer the main beam of an array antenna instantaneously into a desired direction where no mechanical mechanism is involved in the scanning process.
openaire +1 more source
Designing Optimal Frequency Offsets for Frequency Diverse Array MIMO Radar
IEEE Transactions on Aerospace and Electronic Systems, 2023Jie Cheng +3 more
openaire +1 more source
Performance Analysis of Frequency Diverse Array with Frequency Offset Errors
2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI), 2021Hu Tang, Yi Liao, Wen-qin Wang
openaire +1 more source