Abstract
A new concept ofq-ary (q=2t) turbo codes and the corresponding decoding aglorithm are presented. With QAM modulations, the proposed algorithm avoids the information loss caused by a pragmatic approach usually used for a binary code to split the channel measurement information into coding bits. So better performance is achieved. Because of the parallel operation property, the decoding can be speeded up by the proposed algorithm. In addition, a method to reduce the average number of iterations is also considered.
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References
Berrou, C., Glavieux, A., Thitimajshima, P., Near Shannon limit error-correcting coding and decoding: Turbo-codes,Proc. ICC’93, Geneve, Switzerland, May 1993, 1064.
Goff, S. Le, Glavieux, A., Berrou, C., Turbo-codes and high spectral efficiency modulation,Proc. ICC’94, New-Orleans, May 1994, 645.
Pyndiah, R., Picart, A., Glavieux, A., Performance of block turbo coded 16-QAM and 64-QAM modulations,Proc. GLOBECOM’95, Singapore, Nov. 1995, 1039.
Fazel, K., Papke, L., Combined multilevel turbo-code with 8PSK modulation,Proc. GLOBECOM’95, Singapore, Nov. 1995, 649.
Bahl, R. L., Cocke, J., Jelinek, F.et al., Optimal decoding of linear codes for minimizing symbol error rate,IEEE Trans. Inform. Theory, 1974, 20(2): 284.
Barbulescu, A., Pietrobon, S., Interleaver design for turbo-codes,Electronics Letters, 1994, 30 (25):2107.
Robertson, P., Illuminating the structure of code and decoder of parallel concatenated recursive systematic (turbo) codes,Proc. GLOBECOM’94, San Francisco, Dec. 1994, 1298.
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Zhang, Y., Wang, X. QAM modulations withq-ary turbo codes. Sci. China Ser. E-Technol. Sci. 40, 64–70 (1997). https://doi.org/10.1007/BF02916591
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DOI: https://doi.org/10.1007/BF02916591