A NEW SOFT-OUTPUT ALGORITHM OF DECODING

Liu Guangliang; Hu Zhengming

Volume 20 Issue 4

Jul. 1998

Turn off MathJax

Article Contents

Article Navigation > Journal of Electronics & Information Technology > 1998 > 20(4): 554-557

Liu Guangliang, Hu Zhengming. A NEW SOFT-OUTPUT ALGORITHM OF DECODING[J]. Journal of Electronics & Information Technology, 1998, 20(4): 554-557.

Citation:

Liu Guangliang, Hu Zhengming. A NEW SOFT-OUTPUT ALGORITHM OF DECODING[J]. Journal of Electronics & Information Technology, 1998, 20(4): 554-557.

Liu Guangliang, Hu Zhengming. A NEW SOFT-OUTPUT ALGORITHM OF DECODING[J]. Journal of Electronics & Information Technology, 1998, 20(4): 554-557.

Citation:

Liu Guangliang, Hu Zhengming. A NEW SOFT-OUTPUT ALGORITHM OF DECODING[J]. Journal of Electronics & Information Technology, 1998, 20(4): 554-557.

PDF( 695 KB)

A NEW SOFT-OUTPUT ALGORITHM OF DECODING

Received Date: 1997-08-11
Rev Recd Date: 1997-12-26
Publish Date: 1998-07-19

Abstract

Abstract

A new soft-output algorithm of decoding is derived from the Bahl algorithm. The complex operations of estimating posterior probabilities and difference metric in the Bahl algorithm are paralleled and well formulated into a set of simple matrix operations which are fit to design efficient VLSI circuits. The probability of uk uk is quantized with n bits and is output together with uk branch code Xk. Thus, the algorithm not only increases the decoding speed, but also provides a soft-output algorithm for multi-level concatenated code.

FullText(HTML)

References(1)

References

Hagenauer J, Hoeher P. A Viterbi algorithm with soft-decision outputs and its applications. Proc. of IEEE Globeconi 89, Dallas, Texas: Nov. 1989: 47.11-47.17.[2]Bahl L R, Cocke .J, Jeinek F, Raviv J. Optimal decoding of linear codes for minimizng symbol error rate. IEEE Trans. on Inform. Theroy, 1974, IT-20(3): 284-287.[3]Forney C D. The Viterbi algorithm[J].Proc. IEEE.1973, 61(3):268-278[4]Blahut. R E. Theory and Practice of Error Control Codes. New York: Addison-Wesley, 1983, Chapter 9: 248 281.[5]GlennGulak P, Sliwedyk E. VLSI structures for Viterbi receivers: Part 1-General theroy and applications, Part. 2-Encoded MSK modulation. IEEE J. of Selected Areas in Comm., 1986,[6]SAC-4(1): 142-159.[7]Berrou C, Glavieux A, Thitirnajshinia P. Near Shannon limit error-correcting coding and decoding: turbo-codes. ICC 1993, 1064-1070.

Relative Articles

Supplements(0)

Cited By

Proportional views