96 citations · 140 across the 5 of their papers we have counts for
9 papers
User Activity Detection and Channel Estimation for Grant-Free Random Access in LEO Satellite-Enabled Internet-of-Things
Zhaoji Zhang, Ying Li, Chongwen Huang +4
With recent advances on the dense low-earth orbit (LEO) constellation, LEO satellite network has become one promising solution to providing global coverage for Internet-of-Things (…
A New Insight into GAMP and AMP
Lei Liu, Ying Li, Chongwen Huang +2
A concise expectation propagation (EP) based message passing algorithm (MPA) is derived for the general measurement channel. By neglecting some high-order infinitesimal terms, the…
Fixed-Symbol Aided Random Access Scheme for Machine-to-Machine Communications
Zhaoji Zhang, Ying Li, Lei Liu +1
The massiveness of devices in crowded Machine-to-Machine (M2M) communications brings new challenges to existing random-access (RA) schemes, such as heavy signaling overhead and sev…
Capacity-Achieving MIMO-NOMA: Iterative LMMSE Detection
Lei Liu, Yuhao Chi, Chau Yuen +2
This paper considers a low-complexity iterative Linear Minimum Mean Square Error (LMMSE) multi-user detector for the Multiple-Input and Multiple-Output system with Non-Orthogonal M…
Gaussian Message Passing for Overloaded Massive MIMO-NOMA
Lei Liu, Chau Yuen, Yong Liang Guan +2
This paper considers a low-complexity Gaussian Message Passing (GMP) scheme for a coded massive Multiple-Input Multiple-Output (MIMO) systems with Non-Orthogonal Multiple Access (m…
Asymptotically Optimal Estimation Algorithm for the Sparse Signal with Arbitrary Distributions
Chongwen Huang, Lei Liu, Chau Yuen
In this paper, we propose a sparse signal estimation algorithm that is suitable for many wireless communication systems, especially for the future millimeter wave and underwater co…