A Novel Efficient Soft Output Demodulation Algorithm for High Order Modulation

  • Authors:

  • Xinyu Gu;Kai Niu;Weiling Wu

  • Affiliations:

  • Beijing University of Posts and Telecommunications;Beijing University of Posts and Telecommunications;Beijing University of Posts and Telecommunications

  • Venue:
  • CIT '04 Proceedings of the The Fourth International Conference on Computer and Information Technology
  • Year:
  • 2004

Quantified Score

Hi-index 0.00

Visualization

Abstract

Combining Turbo-codes and high order modulation is a simple but effective way to improve the bandwidth efficiency. Since the Turbo decoder requires binary soft decisions as the input information, the demodulator has to provide bit level soft information (LLR) to it. In this paper, a novel simplified algorithm to calculate LLR is developed, which will remarkably reduce the computational complexity, and has nearly no performance loss.