NDLI: Investigation of simple threshold shifting for bit-flip decoding

Content Provider	IEEE Xplore Digital Library
Author	Webber, J. Nishimura, T. Ohgane, T. Ogawa, Y.
Copyright Year	2011
Description	Author affiliation: Graduate School of Information Science and Technology, Hokkaido University, Kita 14, Nishi 9, Kita-ku, Sapporo 060-0814, Japan (Webber, J.; Nishimura, T.; Ohgane, T.; Ogawa, Y.)
Abstract	Remarkably low error rates can be obtained using low-density parity-check (LDPC) codes and their use is now an increasingly common option in communications standards. The classic decoders based on belief propagation offer very high performance but have high implementation complexity. Therefore over the last decade simpler architectures such as the bit flipping class of algorithms have been researched. Recently, a number of adaptive threshold algorithms have been proposed in which at each iteration a bit is either flipped if it is below an inversion threshold, or the threshold is lowered. By choosing certain values of the scaling factor, the scaling can be efficiently implemented using a small number of shift and add operations. This work looks at how the scaling factor affects the convergence and error performance, and investigates an algorithm that switches between two scaling values based on the syndrome sum. The dual scaling method maintained the error performance compared to that with a single scaling but the iteration count was significantly reduced.
Starting Page	1
Ending Page	5
File Size	175027
Page Count	5
File Format	PDF
ISBN	9781457717864
ISSN	18825621
e-ISBN	9782908849257
e-ISBN	9782908849264
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-10-03
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	National Institute of Inform
Subject Keyword	Bit error rate Parity check codes Complexity theory Decoding Reliability Signal to noise ratio Convergence
Content Type	Text
Resource Type	Article

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