Abstract

An effective way of reducing the energy consumption without affecting the quality of service is by adapting to the channel conditions. In this paper we describe one such scheme for an OFDM system using space division multiplexing technology. We consider tuning parameters such as modulation level and number of antennas that are considered by WiMax and LTE, as well as number of sub-carriers, peak to average power ratio, interpolation, pilot length and cyclic prefix. We describe a two-phase procedure for determining the parameter settings for minimizing energy consumption given the transmission rate, error performance and channel conditions for frequency selective fading channels. Our results show that we can reduce energy by an additional 5%-30% compared to systems that can only adapt modulation order and number of antennas.

Original languageEnglish (US)
Title of host publication2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010 - Proceedings
Pages1590-1593
Number of pages4
DOIs
StatePublished - Nov 8 2010
Event2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010 - Dallas, TX, United States
Duration: Mar 14 2010Mar 19 2010

Publication series

NameICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
ISSN (Print)1520-6149

Other

Other2010 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2010
CountryUnited States
CityDallas, TX
Period3/14/103/19/10

Keywords

  • Energy optimization
  • OFDM
  • Parameter tuning
  • QoS

ASJC Scopus subject areas

  • Software
  • Signal Processing
  • Electrical and Electronic Engineering

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