Joint rate and power adaptation for wireless local area networks in generalized Nakagami fading channels

Li-Chun Wang*, Wei Cheng Liu, Anderson Chen, Kuang Nan Yen

*Corresponding author for this work

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

In this paper, a channel-driven rate and power adaptation (CDRPA) algorithm is proposed for wireless local area networks (WLANs) in generalized Nakagami fading channels. Through the channel information of the first packet, the CDRPA algorithm can lower the complexity of comparing various rates and power levels. In the case of the IEEE 802.11 WLAN, the computation complexity of the CDRPA algorithms is reduced by more than 94% compared with the complete-search link adaptation. A physical and/or medium access control (MAC) cross-layer analytical model is also developed to evaluate the goodput and energy efficiency of the carrier sense multiple access with a collision avoidance MAC protocol in Nakagami fading channels. Our numerical results show that the CDRPA algorithm is not only more energy efficient in the Nakagami fading channel but can also achieve comparable and even higher throughput compared with the complete-search link adaptation approach.

Original languageEnglish
Pages (from-to)1375-1386
Number of pages12
JournalIEEE Transactions on Vehicular Technology
Volume58
Issue number3
DOIs
StatePublished - 14 Apr 2009

Keywords

  • Channel-driven rate and power adaptation (CDRPA)
  • IEEE 802.11
  • Medium access control (MAC)
  • Nakagami fading channels
  • Wireless local area networks (WLANs)

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