Cell-free massive MIMO networks: Optimal power control against active eavesdropping

Tiep M. Hoang, Hien Quoc Ngo, Trung Q. Duong*, Hoang Duong Tuan, Alan Marshall

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

40 Citations (Scopus)
186 Downloads (Pure)


This paper studies the security aspect of a recently introduced 'cell-free massive MIMO' network under a pilot spoofing attack. First, a simple method to recognize the presence of this type of an active eavesdropping attack to a particular user is shown. In order to deal with this attack, we consider the problem of maximizing the achievable data rate of the attacked user or its achievable secrecy rate. The corresponding problems of minimizing the power consumption subject to security constraints are also considered in parallel. Path-following algorithms are developed to solve the posed optimization problems under different power allocation to access points (APs). Under equip-power allocation to APs, these optimization problems admit closed-form solutions. Numerical results show their efficiency.

Original languageEnglish
Article number8360138
Pages (from-to)4724-4737
Number of pages14
JournalIEEE Transactions on Communications
Issue number10
Early online date16 May 2018
Publication statusPublished - 01 Oct 2018


  • active eavesdropping
  • Cell-free
  • channel estimation
  • inner convex approximation
  • pilot spoofing attack

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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