39 citations · 42 across the 6 of their papers we have counts for
6 papers
Consensus ALADIN: A Framework for Distributed Optimization and Its Application in Federated Learning
Xu Du, Jingzhe Wang
This paper investigates algorithms for solving distributed consensus optimization problems that are non-convex. Since Typical ALADIN (Typical Augmented Lagrangian based Alternating…
Alternating Direction Based Sequential Boolean Quadratic Programming Method for Transmit Antenna Selection
Shijie Zhu, Xu Du
The wireless mobile communication system is updated and iterated on the whole almost every decade. It is now in the development period of the application scenarios of the fifth gen…
Massive MIMO Channels with Inter-User Angle Correlation: Open-Access Dataset, Analysis and Measurement-Based Validation
Xu Du, Ashutosh Sabharwal
In practical propagation environments, different massive MIMO users can have correlated angles in spatial paths. In this paper, we study the effect of angle correlation on inter-us…
Balancing Queueing and Retransmission: Latency-Optimal Massive MIMO Design
Xu Du, Yin Sun, Ness B. Shroff +1
One fundamental challenge in 5G URLLC is how to optimize massive MIMO systems for achieving low latency and high reliability. A natural design choice to maximize reliability and mi…
Multiuser MIMO Sequential Beamforming with Full-duplex Training
Xu Du, John Tadrous, Ashutosh Sabharwal
Multiple transmitting antennas can considerably increase the downlink spectral efficiency by beamforming to multiple users at the same time. However, multiuser beamforming requires…
Multiuser MIMO Beamforming with Full-duplex Open-loop Training
Xu Du, John Tadrous, Chris Dick +1
In this paper, full-duplex radios are used to continuously update the channel state information at the transmitter, which is required to compute the downlink precoding matrix in MI…