Modulation diversity (MoDiv) is a simple and practical transmission enhancement technique that utilizes different modulation mappings to reduce packet loss rate and achieve higher link throughput. MoDiv is particularly meaningful and effective in Hybrid-Automatic Repeat reQuest (HARQ) systems. We study the deployment and optimization of MoDiv for HARQ in a MIMO-coordinated multi-point scenario under Rician fading channel to mitigate packet loss. We formulate the design optimization of MoDiv into a quadratic 3-D assignment problem, then solve it using a modified iterated local search method. Numerical results demonstrate clear performance gain over simple retransmissions and over a heuristic design under fading channels.

Original languageEnglish (US)
Article number7593297
Pages (from-to)290-293
Number of pages4
JournalIEEE Communications Letters
Issue number2
StatePublished - Feb 2017


  • CoMP
  • HARQ
  • MIMO
  • MoDiv
  • Q3AP

ASJC Scopus subject areas

  • Modeling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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