Integrated link adaptation and power control to improve error and throughput performance in broadband wireless packet networks

Kin K. Leung*, Li-Chun Wang

*Corresponding author for this work

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

In this paper, we prove that the problem of maximizing data throughput by adaptive modulation and power control while meeting packet error requirements is NP-complete. A heuristic algorithm for integrated link adaptation and power control is, thus, proposed to achieve specified error rates and to improve overall throughput for real-time applications in broadband wireless packet networks. The algorithm divides terminals into groups according to their signal path gains and periodically adapts transmissions based on the required error rates, actual error statistics, and average transmission power of each terminal group. Transmission power is adjusted by an enhanced Kalman-filter method to ensure successful reception. Extensive simulation results reveal that the algorithm consistently delivers the specified error performance and attempts to maximize network throughput for a wide range of parameter settings.

Original languageEnglish
Pages (from-to)619-629
Number of pages11
JournalIEEE Transactions on Wireless Communications
Volume1
Issue number4
DOIs
StatePublished - 1 Dec 2002

Keywords

  • Adaptive Kalman filtering
  • Adaptive modulation
  • Cochannel interference
  • Error analysis
  • Land mobile radio cellular systems
  • Packet switching
  • Power control
  • Radio communication
  • Time division multi-access

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