Results 21 to 30 of about 5,290,066 (245)

A Flexible Phased-MIMO Array Antenna with Transmit Beamforming

open access: yesInternational Journal of Antennas and Propagation, 2012
Although phased-array antennas have been widely employed in modern radars, the requirements of many emerging applications call for new more advanced array antennas.
Wen-Qin Wang, Huaizong Shao
doaj   +1 more source

Isolation Enhancement of Wide-Band MIMO Array Antennas Utilizing Resistive Loading

open access: yesIEEE Access, 2019
In this paper, we propose the use of resistor-loaded paired parallel-coupled resonators (PCRs) for mutual coupling reduction and isolation enhancement in wideband MIMO array antennas.
Jung-Dong Park   +2 more
doaj   +1 more source

Transmitting strategy with high degrees of freedom for pulsed‐coherent FDA radar

open access: yesIET Radar, Sonar & Navigation, 2022
Multidimensional and flexible radar resource transmission in time, frequency and space domains is strongly demanded for advanced digital array radar to meet the challenging observation requirements.
Lei Yu, Feng He, Yi Su, Zhen Dong
doaj   +1 more source

Design of a Millimeter-Wave MIMO Antenna Array for 5G Communication Terminals

open access: yesSensors, 2022
This paper presents a design of multiple input multiple output (MIMO) antenna array for 5G millimeter-wave (mm-wave) communication systems. The proposed MIMO configuration consists of a two antenna arrays combination.
Jalal Khan   +5 more
doaj   +1 more source

An error bound analysis for M-DPSK in frequency-selective Rayleigh fading channel with diversity reception [PDF]

open access: yes, 1994
A theoretical upper bound is presented to calculate the error probability for raised cosine filtered M-ary differential phase-shift keying (RC M-DPSK) in frequency-selective Rayleigh fading channels.
Nix, AR, Chow, YC, McGeehan, JP
core   +1 more source

Prospects of FMCW-based frequency diverse array radar

open access: yesThe Journal of Engineering, 2019
The linear frequency modulated (LFM) frequency modulated continuous wave (FMCW)-based frequency diverse array (FDA) radar concept is investigated in detail. The radar operates as a linear pulsed FMCW/FDA in the transmission (TX) mode while it operates as
Ramazan Çetiner   +3 more
doaj   +1 more source

Mainlobe Deceptive Jammer Suppression Based on Quadratic Phase Coding in FDA-MIMO Radar

open access: yesRemote Sensing, 2022
In this paper, the problem of mainlobe deceptive jammer suppression is solved with the frequency diversity array-multiple-input multiple-output (FDA-MIMO) radar system.
Yiqun Zhang   +3 more
doaj   +1 more source

Robust FDA-STAP Under Transmit Array Gain and Phase Error for Range Ambiguity

open access: yesEng
Frequency diverse array (FDA)-aided spacetime adaptive processing (STAP) is a useful approach to suppressing range-ambiguous clutter in airborne radars.
Di Song   +3 more
doaj   +1 more source

Frequency-Selective Surface-Based MIMO Antenna Array for 5G Millimeter-Wave Applications

open access: yesSensors, 2023
In this paper, a radiating element consisting of a modified circular patch is proposed for MIMO arrays for 5G millimeter-wave applications. The radiating elements in the proposed 2 × 2 MIMO antenna array are orthogonally configured relative to each other
Iftikhar Ud Din   +8 more
doaj   +1 more source

Frequency Invariant Beamforming in Subbands

open access: yes, 2004
In this paper, two subband implementations of a frequency invariant beamformer (FIB) are studied. In the first structure, the received array signals are split into subbands and an FIB is operated in each of the corresponding decimated subbands, with a ...
Weiss, S, Liu, Wei, Liu, W, Weiss, S.
core   +2 more sources

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