Joint optimisation of secret key capacity and sparse channel estimation based on pilot power allocation

Chenhao Qi, Arumugam Nallanathan, Lenan Wu

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Pilot power allocation is investigated under the framework of physical layer secure communications in time-division duplex systems, where the secret keys are generated from the estimates of sparse wireless channels. The joint optimisation of secret key capacity and sparse channel estimation performance based on pilot power allocation is formulated as a convex optimisation problem. Considering the fairness between these two sides, a scaling factor is introduced. Then, a scheme is proposed to fast solve the problem by looking up a table and using existing optimisation solvers. Simulation results show that a proper scaling factor can make a trade-off between the secret key capacity and sparse channel estimation performance.
Original languageEnglish
Pages (from-to)1033-1035
Number of pages3
JournalIEE Electronics Letters
Volume51
Issue number13
DOIs
Publication statusPublished - 25 Jun 2015

Keywords

  • channel estimation

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