Title :
A general interleaver for equal and unequal error protections of turbo codes with short frames
Author :
Salah, M.M. ; Raines, R.A. ; Temple, M.A. ; Bailey, T.G.
Author_Institution :
Inst. of Technol., Wright-Patterson AFB, OH, USA
Abstract :
The key to the efficient operation of turbo codes is the interleaver design. With proper design, the pairing of low-weight sequences to the input of the encoders can be avoided. Circular shift interleavers can be used to ensure that the minimum distance due to weight-2 input sequences grows roughly as √2N, where N is the block length. We generalized the mapping function of the circular shift interleaver to be suitable for both equal and unequal error protections. Also, we present the results of a unique examination of the behavior of the general circular shift interleaver for equal and unequal error protections using turbo code with short frames
Keywords :
concatenated codes; convolutional codes; error correction codes; interleaved codes; turbo codes; block length; circular shift interleaver; circular shift interleavers; convolutional encoders; equal error protection; general interleaver; generalized mapping function; interleaver design; low-weight sequences; minimum distance; parallel concatenation; short frames; turbo codes; unequal error protection; weight-2 input sequences; Computer errors; Convolution; Convolutional codes; Error correction codes; Image coding; Interleaved codes; Protection; Signal to noise ratio; Speech coding; Turbo codes;
Conference_Titel :
Information Technology: Coding and Computing, 2000. Proceedings. International Conference on
Conference_Location :
Las Vegas, NV
Print_ISBN :
0-7695-0540-6
DOI :
10.1109/ITCC.2000.844263