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Massive Multiple-Input-Multiple-Output (MIMO) ensures spectral and energy improvements for a large number of communicating terminals in the base station. Signal distortion is observed due to overlapping channels that are adaptable to the receiving terminal's radiation patterns. For addressing this specific issue, a Cross Correlation-based Signal Pruning Method (CCSPM) is introduced. This method is introduced for suppressing signal distortion and reducing extraction complexity at the receiver terminal. The proposed method identifies the correlation using cumulative distortion rates between the adjacent channels during the beamforming process in massive MIMO. Such correlation is pruned until the channel is available between the base station and the receiver terminal. The process is validated using linear vector learning through which the signal vector representations are pursued. In the signal vector representation, the conventional signal is pruned for its maximum distortion rate post the correlation. The vector representation is recurrent until the least possible distortion rate is observed. If the signal is incomplete then the successive transmitting interval output is pruned to augment the previous ones. The proposed CCSPM improves the interval output by 9.39%, reduces distortion rate by 7.9%, and complexity by 9.09% for the varying frequency.
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http://dx.doi.org/10.1038/s41598-025-97403-7 | DOI Listing |
Phys Rev Lett
August 2025
University of Calgary, Institute for Quantum Science and Technology, and Department of Physics and Astronomy, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
Theoretical quantum memory design often involves selectively focusing on certain energy levels to mimic an ideal Λ configuration, a common approach that may unintentionally overlook the impact of neighboring levels or undesired couplings. While this simplification may be justified in certain protocols or platforms, it can significantly distort the achievable memory performance. Through numerical semiclassical analysis, we show that the presence of unwanted energy levels and undesired couplings in an absorptive memory based on a nitrogen-vacancy center can significantly amplify the signal, resulting in memory efficiencies exceeding unity, a clear indication of unwanted noise at the quantum level.
View Article and Find Full Text PDFJ Appl Clin Med Phys
September 2025
Department of Radiation Oncology, Virginia Commonwealth University, Richmond, Virginia, USA.
Purpose: Real‑time magnetic resonance-guided radiation therapy (MRgRT) integrates MRI with a linear accelerator (Linac) for gating and adaptive radiotherapy, which requires robust image‑quality assurance over a large field of view (FOV). Specialized phantoms capable of accommodating this extensive FOV are therefore essential. This study compares the performance of four commercial MRI phantoms on a 0.
View Article and Find Full Text PDFIEEE Trans Image Process
September 2025
3D imaging based on phase-shifting structured light is widely used in industrial measurement due to its non-contact nature. However, it typically requires a large number of additional images (multi-frequency heterodyne (M-FH) method) or introduces intensity features that compromise accuracy (space domain modulation phase-shifting (SDM-PS) method) for phase unwrapping, and it remains sensitive to motion. To overcome these issues, this article proposes a nonlinear phase coding-based stereo phase unwrapping (NPC-SPU) method that requires no additional patterns while maintaining measurement accuracy.
View Article and Find Full Text PDFEar Hear
September 2025
Department of Otolaryngology, Head and Neck Surgery, Kyushu University, Fukuoka, Japan.
Objectives: This study aimed to investigate the potential contribution of subtle peripheral auditory dysfunction to listening difficulties (LiD) using a threshold-equalizing noise (TEN) test and distortion-product otoacoustic emissions (DPOAE). We hypothesized that a subset of patients with LiD have undetectable peripheral auditory dysfunction.
Design: This case-control study included 61 patients (12 to 53 years old; male/female, 18/43) in the LiD group and 22 volunteers (12 to 59 years old; male/female, 10/12) in the control group.
Sci Rep
September 2025
Fukushima Renewable Energy Institute, Koriyama, 963-0298, Japan.
This study proposes a novel and computationally efficient method for real-time identification and localization of power quality (PQ) disturbances in microgrids using dynamic Lissajous patterns formed by voltage and current waveforms. Each power disturbance-such as sag, swell, harmonic distortion, and transients-induces a unique geometric deformation in the Lissajous figure, which serves as a visual signature of the event. Key geometric and statistical features, including area, skewness, kurtosis, and centroid deviation, are extracted from these dynamic patterns to construct robust indices for classification.
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