3 papers
cs.IT2025
Continuous Angular Power Spectrum Recovery From Channel Covariance via Chebyshev Polynomials
Shengsong Luo, Ruilin Wu, Chongbin Xu +3
This paper proposes a Chebyshev polynomial expansion framework for the recovery of a continuous angular power spectrum (APS) from channel covariance. By exploiting the orthogonalit…
cs.IT2025
Affine-Projection Recovery of Continuous Angular Power Spectrum: Geometry and Resolution
Shengsong Luo, Ruilin Wu, Chongbin Xu +3
This paper considers recovering a continuous angular power spectrum (APS) from the channel covariance. Building on the projection-onto-linear-variety (PLV) algorithm, an affine-pro…
eess.SP2024
Precise Analysis of Covariance Identifiability for Activity Detection in Grant-Free Random Access
Shengsong Luo, Junjie Ma, Chongbin Xu +1
We consider the identifiability issue of maximum likelihood based activity detection in massive MIMO based grant-free random access. A prior work by Chen et al. indicates that the…