731 citations · 3.8k across the 42 of their papers we have counts for
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An Efficient Algorithm for Device Detection and Channel Estimation in Asynchronous IoT Systems
Liang Liu, Ya-Feng Liu
A great amount of endeavour has recently been devoted to the joint device activity detection and channel estimation problem in massive machine-type communications. This paper targe…
Uplink-Downlink Duality Between Multiple-Access and Broadcast Channels with Compressing Relays
Liang Liu, Ya-Feng Liu, Pratik Patil +1
Uplink-downlink duality refers to the fact that under a sum-power constraint, the capacity regions of a Gaussian multiple-access channel and a Gaussian broadcast channel with Hermi…
A Covariance-based User Activity Detection and Channel Estimation Approach with Novel Pilot Design
Lei Cheng, Liang Liu, Shuguang Cui
This paper studies the massive machine-type communications (mMTC) for the future Internet of Things (IoT) applications, where a large number of IoT devices exist in the network and…
Towards Reliable UAV Swarm Communication in D2D-Enhanced Cellular Network
Yitao Han, Liang Liu, Lingjie Duan +1
In the existing cellular networks, it remains a challenging problem to communicate with and control an unmanned aerial vehicle (UAV) swarm with both high reliability and low latenc…
Intelligent Reflecting Surface Assisted Massive MIMO Communications
Zhaorui Wang, Liang Liu, Shuguang Cui
In a practical massive MIMO (multiple-input multiple-output) system, the number of antennas at a base station (BS) is constrained by the space and cost factors, which limits the th…