Title :
On the capacity of low-density parity-check codes
Author :
Chung, Sae-Young ; Forney, G. David, Jr.
Author_Institution :
Airvana Inc., Chelmsford, MA, USA
Abstract :
We demonstrate that we can translate threshold values of low-density parity-check (LDPC) codes between channels accurately using a simple mapping. We develop some models of density evolution from this observation, namely erasure-channel and reciprocal-channel approximations. The reciprocal-channel approximation, based on dualizing LDPC codes, provides a very accurate model of density evolution for the additive-white Gaussian noise (AWGN) channel
Keywords :
AWGN channels; channel capacity; error correction codes; AWGN channel; LDPC codes; additive-white Gaussian noise channel; channel capacity; density evolution; erasure-channel approximation; low-density parity-check codes; reciprocal-channel approximation; threshold values; AWGN channels; Channel capacity; Decoding; Gaussian noise; Laboratories; Memoryless systems; Parity check codes;
Conference_Titel :
Information Theory, 2001. Proceedings. 2001 IEEE International Symposium on
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-7123-2
DOI :
10.1109/ISIT.2001.936183
