A channel phase error compensation method for multi-channel synthetic aperture ladar
Sign Up to like & getrecommendations! Published in 2019 at "Optik"
DOI: 10.1016/j.ijleo.2018.10.074
Abstract: Abstract With the development of earth remote sensing technology, it is required to obtain high resolution and wide swath simultaneously. Synthetic Aperture Ladar(SAL) can achieve high-resolution images, but swath of images is limited. The multi-channel… read more here.
Keywords: phase error; compensation; synthetic aperture; channel ... See more keywords
Design and development of a laser interferometer for magnet alignment and phase error analysis in an undulator
Sign Up to like & getrecommendations! Published in 2020 at "Measurement"
DOI: 10.1016/j.measurement.2020.107490
Abstract: Abstract In this paper we discuss design and development of a laser interferometer for undulator measurement application. The vertical misalignment of the magnets in the undulator results in non uniformity in the undulator gap and… read more here.
Keywords: laser interferometer; laser; undulator; phase error ... See more keywords
Wavelength-tuning multiple-surface interferometric analysis with compression of Zernike piston phase error
Sign Up to like & getrecommendations! Published in 2021 at "Measurement"
DOI: 10.1016/j.measurement.2021.110078
Abstract: Abstract In this study, we propose a 6N – 3 algorithm for suppressing the Zernike piston phase error by expanding 6N – 5 algorithm using algorithmic polynomial theory. We demonstrate that the proposed algorithm can be used for simultaneous… read more here.
Keywords: surface; zernike piston; piston phase; error ... See more keywords
Design, simulation, and fabrication of microstrip lens with non-uniform contour for 360 degree scanning
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Electromagnetic Waves and Applications"
DOI: 10.1080/09205071.2019.1675537
Abstract: ABSTRACT In designing lens as a beamformer, the phase error is one of the most important challenges. Non-focal lens design for 360-degree scanning is the sufficient method for reducing phase error. In this paper, a… read more here.
Keywords: 360 degree; degree scanning; phase error;
Direct position determination with phase error compensation for multiple targets using spatial sparsity
Sign Up to like & getrecommendations! Published in 2021 at "Measurement Science and Technology"
DOI: 10.1088/1361-6501/abe9dc
Abstract: Measuring the positions of multiple targets is key in many positioning applications. Utilizing compressed sensing theory, measurements using the sparse direct position determination (DPD) methods are more accurate than the two-step methods and the traditional… read more here.
Keywords: direct position; position; multiple targets; error compensation ... See more keywords
Universal representation of undulator phase errors
Sign Up to like & getrecommendations! Published in 2018 at "Physical Review Accelerators and Beams"
DOI: 10.1103/physrevaccelbeams.21.110704
Abstract: The phase error is an important parameter to represent the quality of an undulator, which makes it possible to quickly evaluate the reduction in photon intensity due to magnetic field errors without rigorous numerical calculations.… read more here.
Keywords: representation undulator; phase; universal representation; undulator ... See more keywords
Phase Noise Effect on Millimeter-Wave Pre-5G Systems
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DOI: 10.1109/access.2020.3030996
Abstract: The introduction of millimeter waves for 5G wireless communication systems enables the use of more bandwidth and higher carrier frequency, surpassing the capacity of current systems by more than one order of magnitude. The leap… read more here.
Keywords: phase noise; phase error; error; phase ... See more keywords
Bit Error Floor Reduction for MQAM Signals in the Presence of Phase Error
Sign Up to like & getrecommendations! Published in 2022 at "IEEE Access"
DOI: 10.1109/access.2022.3232078
Abstract: We propose a method to form a non-uniform decision boundary (NUDB) for $M$ -ary quadrature amplitude modulation (MQAM) signals to reduce bit error floor (BEF) in the presence of phase error. We put our focus… read more here.
Keywords: mqam signals; bit error; presence phase; decision ... See more keywords
ISAR Imaging and Cross-Range Scaling for Maneuvering Targets by Using the NCS-NLS Algorithm
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Sensors Journal"
DOI: 10.1109/jsen.2019.2898231
Abstract: The azimuth resolution of an inverse synthetic aperture radar (ISAR) image is determined by the angular diversity of the target. In order to improve the azimuth resolution of an ISAR image, it is necessary to… read more here.
Keywords: range scaling; cross range; isar; phase error ... See more keywords
Polynomial Regression Predistortion for Phase Error Calibration in X-Band SAR
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DOI: 10.1109/lgrs.2020.3024600
Abstract: Predistortion is used to compensate for a waveform or phase of a signal in advance. Although the signal that applies predistortion exhibits a nonideal shape at the baseband, it has an improved phase value after… read more here.
Keywords: phase; predistortion; polynomial regression; phase error ... See more keywords
A 27–42-GHz Low Phase Error 5-Bit Passive Phase Shifter in 65-nm CMOS Technology
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Microwave and Wireless Components Letters"
DOI: 10.1109/lmwc.2020.3012459
Abstract: A 27–42-GHz 5-bit passive switching phase shifter is presented using 65-nm CMOS technology for the fifth generation (5G) applications. In the 180° phase shift bit, a reflection-type-based biphase modulator topology is developed to achieve good… read more here.
Keywords: phase shifter; error; phase; phase error ... See more keywords