Nonlinear spreading for communications in co-band interference channels

  • Authors:

  • Robert J. Baxley;Brett Walkenhorst

  • Affiliations:

  • Georgia Tech Research Institute, Atlanta, GA;Georgia Tech Research Institute, Atlanta, GA

  • Venue:
  • Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
  • Year:
  • 2009

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Abstract

Significant recent research effort has been devoted to mitigating the detrimental nonlinear effects that physical components play on communications signals. In this paper, we take a different view of system nonlinearity and show how it can be leveraged to increase system performance. Specifically, we propose a spread spectrum modulation called nonlinear spreading to increase link robustness in co-band interference channels and show that large performance benefits are possible. We also show how the power spectral density (PSD) of a nonlinearity spread function can be controlled by shaping the input PSD.