Results 31 to 40 of about 519,811 (291)
Space scanning FMCW-based two-dimensional frequency diverse array radar
The Journal of Engineering, 2019 The frequency-modulated continuous wave (FMCW)-based frequency diverse array (FDA) radar concept is extended to two dimensions (2D). The radar operates as a linear pulsed FMCW/FDA in the transmission (TX) mode while it operates as a pulsed FMCW/phased ...
Savaş Karadağ +2 more
doaj +1 more source
Frequency Diverse Array Target Localization Based on IPSO-BP
International Journal of Antennas and Propagation, 2020 For the traditional target localization algorithms of frequency diverse array (FDA), there are some problems such as angle and distance coupling in single-frequency receiving FDA mode, large amount of calculation, and weak adaptability.
Qinghua Liu +3 more
doaj +1 more source
Ultra-Wideband Imaging via Frequency Diverse Array with Low Sampling Rate
Remote Sensing, 2022 Imaging systems based on millimeter waves (mm-waves) are advancing to achieve higher resolution and wider bandwidth. However, a large bandwidth requires high sample rates, which may limit the development of ultra-wideband imaging systems. In this letter,
Zhonghan Wang, Yaoliang Song, Yitong Li
doaj +1 more source
A New Look at Physical Layer Security, Caching, and Wireless Energy Harvesting for Heterogeneous Ultra-dense Networks [PDF]
, 2017 Heterogeneous ultra-dense networks enable ultra-high data rates and ultra-low latency through the use of dense sub-6 GHz and millimeter wave (mmWave) small cells with different antenna configurations.
Heath Jr, Robert W. +4 more
core +3 more sources
Angle-range-polarization-dependent beamforming for polarization sensitive frequency diverse array
EURASIP Journal on Advances in Signal Processing, 2019 In this paper, we present a polarization sensitive frequency diverse array (PSFDA), which benefits both from frequency diverse array (FDA) and polarization sensitive array (PSA), producing angle-range-polarization-dependent beamforming capability.
Hui Chen, HuaiZong Shao, HongYang Chen
doaj +1 more source
Frequency Diverse Array Auto-Scanning Beam Characteristics and Potential Radar Applications
IEEE Access, 2022 Different from the phased-array with the same carrier frequency for all elements providing only angle-dependent beampattern, frequency diverse array (FDA) using a small frequency offset across its array elements offers new application capabilities due to
Wen-Qin Wang
doaj +1 more source
Remote Assessment of Cultural Heritage Environments with Wireless Sensor Array Networks [PDF]
, 2014 The logistics and cost of environmental monitoring can represent challenges for heritage managers, partly because of the sheer number of environmental parameters to consider.
Agbota +15 more
core +2 more sources
Designing Planar Frequency Diverse Arrays in Space-Frequency Domain
, 2022 Abstract Antenna arrays benefit from spatial diversity, which allows controlling the pattern specifications in space. Adding frequency diversity to the arrays initiates opportunity to control the beams in the Space-Time domain. Frequency Diverse Array (FDA) has a Range-Angle dependent pattern; therefore, the array's spatial and time behavior ...
Maryam Hasheminasab +2 more
openaire +1 more source
Antenna Element Index Modulation for Frequency Diverse Array
International Journal of Antennas and Propagation, 2019 In this paper, we propose a new architecture and provide performance analysis for frequency diverse array (FDA) Radar combined with the index modulation (IM) techniques. Here, the IM concept is applied upon frequency offsets in an FDA.
Gaojian Huang +3 more
doaj +1 more source
, 2016 In this paper, we propose a new type of array antenna, termed the Random Frequency Diverse Array (RFDA), for an uncoupled indication of target direction and range with low system complexity.
Liu, Yimin +3 more
core +1 more source