Modulation-Mode Assignment in Iteratively Detected and SVD-Assisted Broadband MIMO Schemes

  • Andreas Ahrens
  • César Benavente-Peces
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 130)


In this contribution we jointly optimize the number of activated MIMO layers and the number of bits per symbol under the constraint of a given fixed data throughput and integrity. In analogy to bit-interleaved coded irregular modulation, we introduce a Broadband MIMO-BICM scheme, where different signal constellations and mappings were used within a single codeword. Extrinsic information transfer (EXIT) charts are used for analyzing and optimizing the convergence behaviour of the iterative demapping and decoding. Our results show that in order to achieve the best bit-error rate, not necessarily all MIMO layers have to be activated.


Multiple-Input Multiple-Output (MIMO) System Wireless transmission Singular-Value Decomposition (SVD) Extrinsic Information Transfer (EXIT) Charts Bit-Interleaved Coded Modulation (BICM) Iterative Decoding Bit-Interleaved Coded Irregular Modulation (BICIM) Spatial Division Multiplexing (SDM) 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Andreas Ahrens
    • 1
  • César Benavente-Peces
    • 2
  1. 1.Department of Electrical Engineering and Computer Science Communications Signal Processing GroupHochschule Wismar, University of Technology, Business and DesignWismarGermany
  2. 2.E.U.I.T de TelecomunicaciónUniversidad Politécnica de MadridMadridSpain

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