Downlink spatial division multiple access (SDMA) optimization of smart antennas by phase-amplitude perturbations based on memetic algorithms

Chao Hsing Hsu, Wen Jye Shyr, Chi Fei Wu, Pao Hua Chou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, a novel method based on the memetic algorithm for downlink Spatial Division Multiple Access (SDMA) optimization technique of smart antennas by is proposed. Via the phase-amplitude perturbation method, the radiation pattern formulas available for searching optimal solutions are deduced to search the optimal weighting vector of the array factor of a smart antenna. In a smart antenna system, one user's signal must be considered as other users' interfering signal. An optimal radiation pattern of a smart antenna can not only adjustably suppress interferers by placing nulls at the directions of the interfering sources but also provide a maximum main lobe in the direction of the desired signals at the same time, i.e., to maximize the Signal to Interference Ratio (SIR). In order to achieve this goal, a new convergent method referred as the two-way convergent method for memetic algorithms is proposed. The optimal radiation pattern design of downlink smart antennas can be achieve Spatial Division Multiple Access (SDMA) optimization by using the phase-amplitude perturbation method.

Original languageEnglish
Title of host publicationSecond International Conference on Innovative Computing, Information and Control, ICICIC 2007
PublisherIEEE Computer Society
ISBN (Print)0769528821, 9780769528823
DOIs
Publication statusPublished - 2007 Jan 1
Event2nd International Conference on Innovative Computing, Information and Control, ICICIC 2007 - Kumamoto, Japan
Duration: 2007 Sep 52007 Sep 7

Publication series

NameSecond International Conference on Innovative Computing, Information and Control, ICICIC 2007

Other

Other2nd International Conference on Innovative Computing, Information and Control, ICICIC 2007
CountryJapan
CityKumamoto
Period07-09-0507-09-07

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All Science Journal Classification (ASJC) codes

  • Computer Science(all)
  • Mechanical Engineering

Cite this

Hsu, C. H., Shyr, W. J., Wu, C. F., & Chou, P. H. (2007). Downlink spatial division multiple access (SDMA) optimization of smart antennas by phase-amplitude perturbations based on memetic algorithms. In Second International Conference on Innovative Computing, Information and Control, ICICIC 2007 [4427714] (Second International Conference on Innovative Computing, Information and Control, ICICIC 2007). IEEE Computer Society. https://doi.org/10.1109/ICICIC.2007.392