Results 91 to 100 of about 97,244 (184)

Downlink Channel Covariance Matrix Reconstruction for FDD Massive MIMO Systems With Limited Feedback

IEEE Transactions on Signal Processing
The downlink channel covariance matrix (CCM) acquisition is the key step for the practical performance of massive multiple-input and multiple-output (MIMO) systems, including beamforming, channel tracking, and user scheduling. However, this task is challenging in the popular frequency division duplex massive MIMO systems with Type I codebook due to the
Kai Li, Ying Li, Lei Cheng, Qingjiang Shi, Zhi-Quan Luo   +4 more
openaire   +3 more sources

Investigating the effects of calibration errors on the spatial resolution of OPM-MEG beamformer imaging

NeuroImage
The use of optically pumped magnetometers (OPMs) has provided a feasible, moveable and wearable alternative to superconducting detectors for magnetoencephalography (MEG) measurements.
Shengjie Qi, Xinda Song, Le Jia, Zhaoxin Duan, Yan Dai, Jing Zhang, Xiaolin Ning   +6 more
doaj   +1 more source

Robust Adaptive Beamforming with Sensor Position Errors Using Weighted Subspace Fitting-Based Covariance Matrix Reconstruction. [PDF]

Sensors (Basel), 2018
Chen P, Yang Y, Wang Y, Ma Y.
europepmc   +1 more source

Reconstructing Spatial Localization Error Maps via Physics-Informed Tensor Completion for Passive Sensor Systems. [PDF]

Sensors (Basel)
Zhang Z, Huang Z, Wang C, Jiang Q.
europepmc   +1 more source

Surface-based image reconstruction optimization for high-density functional near-infrared spectroscopy. [PDF]

Neurophotonics
Carlton LB, Altınkaynak M, Kelley SM, Zimmermann BB, Kura S, Middell E, von Lühmann A, Stephen EP, Yücel MA, Boas DA.   +9 more
europepmc   +1 more source

Ciphertext-Only Attack on Grayscale-Based EtC Image Encryption via Component Separation and Regularized Single-Channel Compatibility. [PDF]

J Imaging
Li R, Fujiyoshi M.
europepmc   +1 more source

High-Accuracy Wave Direction Estimation Using Kalman Fusion of Interferometric Measurements and Energy Field Reconstruction. [PDF]

Sensors (Basel)
Wang C, Li X, Xue L.
europepmc   +1 more source

An Improved Two-Stage RARE Algorithm for Mixed Far-Field and Near-Field Source Localization Under Unknown Mutual Coupling with the Uniform Linear Sensor Array. [PDF]

Sensors (Basel)
Chen K, Deng K, Zhang J.
europepmc   +1 more source

Coded Aperture Optimization in X-Ray Computed Tomography via Sparse Covariance Matrix Estimation. [PDF]

Sensors (Basel)
Jiang Y, Mao T, Zhou J, Zhao Q, Yin J, Yi X, Wu H.   +6 more
europepmc   +1 more source

Bayesian perspective for orientation determination in cryo-EM with application to structural heterogeneity analysis. [PDF]

Acta Crystallogr D Struct Biol
Xu S, Balanov A, Singer A, Bendory T.
europepmc   +1 more source