papers
Publications (4)
math.OC2014
Semidefinite Relaxation for Two Mixed Binary Quadratically Constrained Quadratic Programs: Algorithms and Approximation Bounds
Zi Xu, Mingyi Hong
cs.IT2019
On the Equivalence of Semidifinite Relaxations for MIMO Detection with General Constellations
Ya-Feng Liu, Zi Xu, Cheng Lu
math.OC2014
An Improved Analysis of Semidefinite Approximation Bound for Nonconvex Nonhomogeneous Quadratic Optimization with Ellipsoid Constraints
Yong Xia, Shu Wang, Zi Xu
cs.IT2013
Joint User Grouping and Linear Virtual Beamforming: Complexity, Algorithms and Approximation Bounds
Mingyi Hong, Zi Xu, Meisam Razaviyayn +1