Science China Information Sciences

, Volume 57, Issue 2, pp 1–13

Iterative signal reconstruction of deliberately clipped SMT signals

  • Zsolt Kollár
  • Juraj Gazda
  • Péter Horváth
  • Lajos Varga
  • Dušan Kocur
Research Paper

DOI: 10.1007/s11432-013-4921-7

Cite this article as:
Kollár, Z., Gazda, J., Horváth, P. et al. Sci. China Inf. Sci. (2014) 57: 1. doi:10.1007/s11432-013-4921-7
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Abstract

Staggered MultiTone (SMT) is a modulation technique showing significantly reduced Adjacent Channel Leakage Ratio (ACLR) resulting in a more compact Power Spectrum Density (PSD) for the transmitted signal, than the well-known and already widely adopted Orthogonal Frequency Division Multiple Access (OFDMA) scheme. However, the unique spectral properties of an SMT signal could be degraded by a non-linear element (e.g. a Power Amplifier (PA)) in the transmitter. Deliberate baseband clipping can be applied to the transmitted signal, reducing the notable high Peak-to-Average Power Ratio (PAPR). The objective of this paper is to give a brief introduction to the SMT scheme, with a special emphasis on deliberate clipping effects and their compensation. The paper introduces two receiver-oriented iterative methods aiming at the restoration of the baseband Bit Error Rate (BER) performance of a non-clipped signal. The methods are evaluated and compared based on numerical simulations. The paper concludes with the selection of a possible candidate for use in systems applying deliberately clipped SMT signals.

Keywords

clipping SMT iterative decoding nonlinear distortion PAPR 

Copyright information

© Science China Press and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Zsolt Kollár
    • 1
  • Juraj Gazda
    • 2
  • Péter Horváth
    • 1
  • Lajos Varga
    • 1
  • Dušan Kocur
    • 2
  1. 1.Budapest University of Technology and EconomicsBudapestHungary
  2. 2.Technical University of KošiceKosiceSlovakia