Advances in Electrical and Computer Engineering (Feb 2011)

Influence of Extrinsic Information Scaling Coefficient on Double-Iterative Decoding Algorithm for Space-Time Turbo Codes with Large Number of Antennas

  • TRIFINA, L.,
  • TARNICERIU, D.,
  • ROTOPANESCU, A.-M.

DOI
https://doi.org/10.4316/AECE.2011.01014
Journal volume & issue
Vol. 11, no. 1
pp. 85 – 90

Abstract

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This paper analyzes the extrinsic information scaling coefficient influence on double-iterative decoding algorithm for space-time turbo codes with large number of antennas. The max-log-APP algorithm is used, scaling both the extrinsic information in the turbo decoder and the one used at the input of the interference-canceling block. Scaling coefficients of 0.7 or 0.75 lead to a 0.5 dB coding gain compared to the no-scaling case, for one or more iterations to cancel the spatial interferences.

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