Wireless Personal Communications

, Volume 69, Issue 4, pp 1783–1797 | Cite as

Space-Time Codebook Design for Spread Systems

Article

Abstract

The problem of designing space-time constellations for communication in spread multiple-antenna wireless systems over Rayleigh fading channel is addressed. Using the asymptotic union bound on error probability as design criterion, codes based on general complex-valued symbols are obtained with a gradient search optimization technique. New space-time constellations are constructed and their performance is assessed. Simulation results show that the proposed technique achieves significant performance gains over existing schemes. Since the designed codebooks do not seem to possess any structure that could reduce the memory requirements for storing the corresponding codebook, the problem of designing structured space-time constellations is also addressed. To overcome this problem, a discrete Fourier transform-based approach is adopted to design structured codebooks and their performance is evaluated. The new structured codebooks also demonstrate significant improvement over state-of-art structured schemes.

Keywords

Spread multiple-input multiple-output (MIMO) Space-time coding Fading channels Performance analysis Diversity methods 

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Copyright information

© Springer Science+Business Media, LLC. 2012

Authors and Affiliations

  1. 1.Universidade Lusófona de Humanidades e TecnologiasLisbonPortugal
  2. 2.Departamento de Engenharia Electrotécnica, Faculdade de Ciências e TecnologiaUniversidade Nova de LisboaCaparicaPortugal
  3. 3.UNINOVAMonte da CaparicaPortugal
  4. 4.Instituto de TelecomunicaçõesLisbonPortugal

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