NDLI: Simultaneous zero-tailing of parallel concatenated codes

Content Provider	IEEE Xplore Digital Library
Author	van Dijk, M. Egner, S. Motwani, R. Koppelaar, A.G.C.
Copyright Year	1963
Abstract	In a parallel concatenated convolutional code, an information sequence is encoded by a convolutional encoder, and an interleaved version of the information sequence is encoded by another convolutional encoder. We discuss the situation in which we require both convolutional encoders to end in the all-zero state. To do so, we have to split an information word in two parts. One part contains the true information bits, and the second part contains the so-called tail bits, which are special bits with values computed such that both encoders end in the all-zero state. Depending on the interleaver, a different number of tail bits are needed. By using a constructive method, we give a characterization of all interleavers for a prescribed number of tail bits. We explain the method of encoding. In addition, simulations have been carried out to investigate the performance of codes resulting from simultaneous zero-tailing. This shows that simultaneous zero-tailing is similar in performance as compared to previously known zero-tailing methods (but with fewer trellis termination bits) and that it is better than zero-tailing just one of the encoders.
Sponsorship	IEEE Information Theory Society
Starting Page	2236
Ending Page	2241
Page Count	6
File Size	388990
File Format	PDF
ISSN	00189448
Volume Number	49
Issue Number	9
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2003-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Concatenated codes Convolutional codes Tail Encoding Computational modeling Iterative decoding Block codes Information theory Laboratories
Content Type	Text
Resource Type	Article
Subject	Library and Information Sciences Information Systems Computer Science Applications

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