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Volume 28 Issue 6
Jun.  2006
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Pan Wen, You Xiao-hu. The Recursive Calculation Method of Bit Soft Output[J]. Journal of Electronics & Information Technology, 2006, 28(6): 1111-1114.
Citation: Pan Wen, You Xiao-hu. The Recursive Calculation Method of Bit Soft Output[J]. Journal of Electronics & Information Technology, 2006, 28(6): 1111-1114.

The Recursive Calculation Method of Bit Soft Output

  • Received Date: 2004-11-08
  • Rev Recd Date: 2005-11-11
  • Publish Date: 2006-06-19
  • In this paper, a new PAM (QAM) constellation is recursively designed by lower order modulation constellation arrangement, and the constellation is still Gray map. The every higher order modulation bit soft output can be calculated by bit soft output of lower order modulation. The soft output of any higher order modulation can be calculated by calculating the soft output of binary modulation. It can decrease complexity. The simulation shows its correctness.
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  • Goff S L, Glavieux A, Berrou C. Turbo-codes and high spectral efficiency modulation. IEEE ICC94, New Orleans, 1994: 645-649.[2]Berrou C, Glavieux A. Near optimum error correcting coding and decoding: Turbo-codes. IEEE Trans. on Commun., 1996, COM-44(10): 1261-1271.[3]Hagenauer S, Offer E, Papke L. Iterative decoding of binary block and convolutional codes. IEEE Trans. on Information Theory, 1996 42(2): 429-445.[4]Nordio A, Hernandez M A, Caire G. Low-complexity turbo equalization and multiuser decoding for TD-CDMA. IEEE Trans. on Commun., 2004 3(2): 454-465.[5]Yeo E, Nikolic B, Anantharam V. Iterative decoder architectures. IEEE Communications Magazine, 2003, 41(8): 132-140.[6]IEEE Std 802.11a/D7.0-1999, Part II: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications: High Speed Physical Layer in the GHz Band.[7]Eklund C, Marks R B, Stanwood K L, Wang S. IEEE standard 802.16a: A technical overview of the wireless MANTM air interface for broadband wireless access. IEEE Communications Magazine, 2002, 40(6): 98-107.[8]Khun-Jush J.[J].et al.. Structure and performance of HIPERLAN/2 physical layer. IEEE VTC 99 Fall, Amsterdam, the Netherlands.1999,:-[9]Rappaport T S. Wireless Communications. Principles and Practice, New Jersey, Prentice Hall: 2002:1-20.[10]Korhonen J. Introduction to 3G Mobile Communications. Boston, London: 2nd Edition Artech House, 2003:7-16.[11]Colavolpe G, Ferrari G, Raheli R. Extrinsic information in iterative decoding: A unified view[J].IEEE Trans. on Comm.2001, 49(12):2088-2094[12]Tosato F, Bisaglia P. Simplified soft-output demapper for binary interleaved COFDM with application to HIPERLAN/2. 2002.ICC 2002. IEEE International Conference on Communications, New York, 2002, Vol. 2: 664-668.[13]Proakis J G. Digital Communications. 4rd edition, McGraw-Hill Inc.2001:254-283.[14]Bendetto S, Divsalar D, Montorsi G, Plooara F. Soft-output decoding algorithm in iterative decoding of turbo codes. JPL TDA Progress Report, 1996: 42-124.
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