Uncoordinated cooperative jamming for secret communications

Shuangyu Luo, Jiangyuan Li, Athina P. Petropulu

Research output: Contribution to journalArticlepeer-review

60 Scopus citations


We consider a Gaussian wiretap channel model with a single-antenna source, destination and eavesdropper. The communication is assisted by multiple multiantenna helpers that transmit noise to confound the eavesdropper. First, we consider a nulling scheme, in which each helper independently transmits noise, designed to maximize the system secrecy rate while creating no interference to the destination. In this scheme, each helper requires only local relay-destination channel state information (CSI). When global CSI is available at the relays, the nulling scheme is not optimal. The optimal jamming noise structure is also provided under global CSI. Interestingly, it is shown both analytically and via simulations that, despite its reduced CSI requirements, the nulling scheme may have secrecy rate performance that is very close to the optimal one. The probability of outage of the nulling scheme is provided in closed form based on the statistics of the eavesdropper CSI.

Original languageEnglish (US)
Article number6511999
Pages (from-to)1081-1090
Number of pages10
JournalIEEE Transactions on Information Forensics and Security
Issue number7
StatePublished - 2013

All Science Journal Classification (ASJC) codes

  • Safety, Risk, Reliability and Quality
  • Computer Networks and Communications


  • Artificial noise
  • cooperative jamming
  • outage probability
  • physical layer security


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