154 citations · 297 across the 5 of their papers we have counts for
5 papers
MMSE Channel Estimation for Two-Port Demodulation Reference Signals in New Radio
Dejin Kong, Xiang-Gen Xia, Pei Liu +1
Two-port demodulation reference signals (DMRS) have been employed in new radio (NR) recently. In this paper, we firstly propose a minimum mean square error (MMSE) scheme with full…
Machine Learning Enabled Preamble Collision Resolution in Distributed Massive MIMO
Jie Ding, Daiming Qu, Pei Liu +1
Preamble collision is a bottleneck that impairs the performance of random access (RA) user equipment (UE) in grant-free RA (GFRA). In this paper, by leveraging distributed massive…
Spectral Efficiency Analysis of Multi-Cell Massive MIMO Systems with Ricean Fading
Pei Liu, Kai Luo, Da Chen +2
This paper investigates the spectral efficiency of multi-cell massive multiple-input multiple-output systems with Ricean fading that utilize the linear maximal-ratio combining dete…
Spectral Efficiency Analysis of Cell-Free Massive MIMO Systems with Zero-Forcing Detector
Pei Liu, Kai Luo, Da Chen +1
In this paper, we firstly derive two approximations of the achievable uplink rate with the perfect/imperfect channel state information (CSI) in cell-free massive multi-input multi-…
Pilot Power Allocation Through User Grouping in Multi-Cell Massive MIMO Systems
Pei Liu, Shi Jin, Tao Jiang +2
In this paper, we propose a relative channel estimation error (RCEE) metric, and derive closed-form expressions for its expectation and the achievable uplink rat…