University of Hertfordshire

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Low-Complexity Energy Efficiency Optimization with Statistical CSI in Two-Hop MIMO Systems

Research output: Contribution to journalArticlepeer-review

  • Alessio Zappone
  • Pan Cao
  • Eduard Jorswieck
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Original languageEnglish
Pages (from-to)1398-1402
Number of pages4
JournalIEEE Signal Processing Letters
Early online date9 Jul 2014
Publication statusPublished - 30 Nov 2014


Energy-efficient resource allocation in a single-user, amplify-and-forward (AF), relay-assisted, multiple-input-multiple-output (MIMO) system is considered in this paper. Previous results in this area assume that perfect CSI is available for at least one of the source-relay and relay-destination channels. Instead, the case in which statistical CSI is available for both the source-relay and relay-destination channel is tackled in this letter. Using fractional programming theory and the alternating maximization algorithm, low-complexity source and relay precoding is performed, subject to quality-of-service (QoS) and power constraints.

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