Energy-bandwidth efficiency tradeoff in MIMO multi-hop wireless networks

Chih Liang Chen*, Wayne E. Stark, Sau-Gee Chen

*Corresponding author for this work

Research output: Contribution to journalArticle

34 Scopus citations


This paper considers a MIMO multi-hop network and analyzes the relationship between its energy consumption and bandwidth efficiency. Its minimum energy consumption is formulated as an optimization problem. By taking both transmit antennas (TAs) and receive antennas (RAs) into consideration, the energy-bandwidth efficiency tradeoff in the networks is investigated. Moreover, the minimum energy of an equally-spaced relaying strategy is investigated for various numbers of antennas. In addition, the minimum energy over all possible antenna pairs is derived. Finally, the effect of the number of hops on the energy-bandwidth efficiency tradeoff is considered. For a fixed antenna pair, the minimum energy over all possible rates and hop numbers are obtained. Generally, the routes with more hops minimize the energy consumption in the low effective rate region. On the other hand, in the high effective rate region, the routes with fewer hops minimize the energy consumption.

Original languageEnglish
Article number5992824
Pages (from-to)1537-1546
Number of pages10
JournalIEEE Journal on Selected Areas in Communications
Issue number8
StatePublished - 1 Sep 2011


  • Communication networks
  • Communication systems
  • MIMO

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