486 citations · 3.5k across the 73 of their papers we have counts for
4 papers · 1 filter
An Accelerated Composite Gradient Method for Large-scale Composite Objective Problems
Mihai I. Florea, Sergiy A. Vorobyov
We introduce a framework, which we denote as the augmented estimate sequence, for deriving fast algorithms with provable convergence guarantees. We use this framework to construct…
An Algebraic Approach to a Class of Rank-Constrained Semi-Definite Programs With Applications
Matthew W. Morency, Sergiy A. Vorobyov
A new approach to solving a class of rankconstrained semi-definite programming (SDP) problems, which appear in many signal processing applications such as transmit beamspace design…
Downlink Performance of Superimposed Pilots in Massive MIMO systems
Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkapera
In this paper, we investigate the downlink throughput performance of a massive multiple-input multiple-output (MIMO) system that employs superimposed pilots for channel estimation.…
Superimposed Pilots are Superior for Mitigating Pilot Contamination in Massive MIMO
Karthik Upadhya, Sergiy A. Vorobyov, Mikko Vehkapera
In this paper, superimposed pilots are introduced as an alternative to time-multiplexed pilot and data symbols for mitigating pilot contamination in massive multiple-input multiple…