An Efficient Soft-Input Scaling Scheme for Turbo Decoding

Author

Lin, Yi-Nan ; Hung, Wei-Wen ; Lin, Wei-Chen ; Chen, Tsan-Jieh ; Lu, Erl-Huei

Author_Institution

Dept. of Electron. Eng., Ming-Chi Univ. of Tech., Taipei

Volume

2

fYear

2006

fDate

5-7 June 2006

Firstpage

252

Lastpage

255

Abstract

As the number of iterations increases, the soft inputs and outputs of a turbo decoder gradually become more reliable. To take the effect into account, this paper presents an efficient adaptive scaling scheme for turbo decoding that extends the sign difference ratio (SDR) technique. Unlike the conventional approach using a fixed set of scaling factors, it adaptively determines the scaling factor for each data block. Simulation results show that the proposed scaling scheme can reduce up to frac14~frac12 iteration when compared to the existing stopping criteria while achieving 0.1~0.2 dB coding gain improvement on average

Keywords

adaptive codes; block codes; iterative decoding; turbo codes; SDR; adaptive scaling scheme; data block; iteration decoding; sign difference ratio technique; soft-input scaling scheme; turbo decoding; AWGN channels; Binary phase shift keying; Bit error rate; Convolutional codes; Gain; Iterative decoding; Modulation coding; Output feedback; Turbo codes; Turbo decoder; adaptive scaling; coding gain improvement.; scheme; sign difference ratio (SDR) technique;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensor Networks, Ubiquitous, and Trustworthy Computing, 2006. IEEE International Conference on

Conference_Location

Taichung

Print_ISBN

0-7695-2553-9

Type

conf

DOI

10.1109/SUTC.2006.28

Filename

1636283