Results 91 to 100 of about 9,233 (214)

Thinning of antenna array via adaptive memetic particle swarm optimization

EURASIP Journal on Wireless Communications and Networking, 2017
Massive multiple input multiple output antenna array is crucial for the fifth generation wireless communication. Proper antenna array design can reduce interference among different signals and generate desirable beamforming.
Xiu Zhang, Xin Zhang
doaj   +1 more source

Improved Sparrow Search Algorithm for Sparse Array Optimization

Modelling and Simulation in Engineering
The synthesis problem of the number of array elements, array element spacing, and array formation is widely concerned in sparse array optimization. The local optimum problem is still an urgent problem to be solved in the existing optimization algorithms.
Juanjuan Ji, Jie Su, Lanfang Zhang, Liuying Zhang, Julang Jiang, Hongliang Ma   +5 more
doaj   +1 more source

Configuration study for a 30 GHz monolithic receive array, volume 1 [PDF]

Gregorian, Cassegrain, and single reflector systems were analyzed in configuration studies for communications satellite receive antennas. Parametric design and performance curves were generated.
Cleaveland, B., Edward, B., Gotkis, S., Hesserbacker, G., Loh, J., Mitchell, B., Nester, W. H.   +6 more
core   +1 more source

Optimal Design of Low Sidelobe Sparse Linear Arrays

IEEE Open Journal of Antennas and Propagation
To optimize the antenna performance in a sparse linear array (SLA) subject to specific constraints of the antenna aperture, number of elements and element spacing, this paper proposes an improved Differential Evolution (DE) algorithm integrating the ...
Li Wang, Fenggan Zhang, Banghuan Hou
doaj   +1 more source

Analytical and experimental investigation of sidelobe suppression techniques for reflector type spacecraft antenna Final technical report [PDF]

Near axis sidelobe suppression techniques for circularly polarized reflector type spacecraft ...
Goebels, F. J., Jr., Meier, R., Thomas, R. K.   +2 more
core   +1 more source

Array Design for Angle of Arrival Estimation Using the Worst-Case Two-Target Cramér-Rao Bound

IEEE Open Journal of Signal Processing
Sparse array design is used to help reduce computational, hardware, and power requirements compared to uniform arrays while maintaining acceptable performance. Although minimizing the Cramér-Rao bound has been adopted previously for sparse sensing,
Costas A. Kokke, Mario Coutino, Richard Heusdens, Geert Leus   +3 more
doaj   +1 more source

Effect of weighting on time sidelobe suppression [PDF]

Weighting simulations in the time domain were considered to shape the time-compressed pulse waveform. The digital input radar data were 32 bit I,Q, and simulated data from a point target, imaged by a Seasat-A type system.
Dicenzo, A.
core   +1 more source

A High-Gain Series-Parallel Millimeter-Wave SIW Cavity-Backed Patch Array [PDF]

Journal of Electromagnetic Engineering and Science
This paper presents a wideband and high-gain 4 × 4 substrate integrated waveguide (SIW) cavity-backed patch array with a simplified feeding network for operation in the millimeter-wave (mmW) band.
Wenlei Wang, Huayan Jin, Lekai Zhou, Kuo-Sheng Chin, Guo Qing Luo   +4 more
doaj   +1 more source

An Efficient Algorithm for Designing Long Aperiodic Binary Sequences With Low Auto-Correlation Sidelobes

IEEE Access
Sequences with low auto-correlation sidelobes are important in diverse fields, including communications, radar, sonar, and medical imaging. The task of finding binary sequences with low auto-correlation is known as a difficult optimization problem ...
Janez Brest, Jan Popic, Jana Herzog, Borko Boskovic   +3 more
doaj   +1 more source

Low sidelobe planar electrically large sparse array antenna with element number reduction based on genetic algorithm

IET Microwaves, Antennas & Propagation
Conventionally, both electrically larger (EL) arrays and sparse arrays offer the advantage of element number reduction but disadvantage of high sidelobe levels.
Yangkun Zhu, Wenyu Ma, Chuang Wang, Wenquan Cao   +3 more
doaj   +1 more source