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Product Accumulate
Codes: Properties and Performance
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ITW 2001
Cairn Australia
Sept, 2001
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K.R.Narayanan, J.Li,
C.N.Georghades
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Abstract --
A new class of codes, named product accumulate codes, which are the
concatenation of an outer product code and an inner rate-1 differential
encoder (or accumulator) is proposed. We show that these codes can perform
within a few tenths of a dB from the Shnnon limit for rates >= 1/2.
For practical block lengths, these codes provide similar performance to
turbo codes but with significantly lower decoding complexity.
Keywords --
product accumulate (PA) codes, turbo codes, serial concatenation,
interleaving gain, union bound, Divsalar simple bound,
density evolution, message-passing decoding
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