Semidefinite approximation for mixed binary quadratically constrained quadratic programs

Zi Xu, Mingyi Hong, Zhi Quan Luo

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Motivated by applications in wireless communications, this paper develops semidefinite programming (SDP) relaxation techniques for some mixed binary quadratically constrained quadratic programs (MBQCQP) and analyzes their approximation performance. We consider both a minimization and a maximization model of this problem. For the minimization model, the objective is to find a minimum norm vector in N-dimensional real or complex Euclidean space, such that M concave quadratic constraints and a cardinality constraint are satisfied with both binary and continuous variables. By employing a special randomized rounding procedure, we show that the ratio between the norm of the optimal solution of the minimization model and its SDP relaxation is upper bounded by 0(Q (M - Q + 1) + M) in the real case and by 0(M(M - Q + 1)) in the complex case. For the maximization model, the goal is to find a maximum norm vector subject to a set of quadratic constraints and a cardinality constraint with both binary and continuous variables. We show that in this case the approximation ratio is bounded from below by 0(e/ln(M)) for both the real and the complex cases where e > 0 is a model parameter. Moreover, this ratio is tight up to a constant factor.

Original languageEnglish (US)
Pages (from-to)1265-1293
Number of pages29
JournalSIAM Journal on Optimization
Volume24
Issue number3
DOIs
StatePublished - 2014

Keywords

  • Approximation bound
  • NP-hard
  • Nonconvex quadratic constrained quadratic programming
  • Semidefinite programming relaxation

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