On finite precision implementation of low density parity check codes decoder

T. Zhang, Z. Wang, K. K. Parhi

Research output: Contribution to journalConference articlepeer-review

13 Scopus citations


In this paper, we analyze the finite precision effects on the decoding, performance of Gallager's low density parity check (LDPC) codes and develop optimal finite word lengths of variables as far as the tradeoffs between the performance and hardware complexity are concerned. We have found that 4 bits and 6 bits are adequate for representing the received data and extrinsic information, respectively. Simulation results indicate that the quantization scheme we have developed for the LDPC decoder is effective in approximating the infinite precision implementation.

Original languageEnglish (US)
Pages (from-to)IV202-IV205
JournalMaterials Research Society Symposium - Proceedings
StatePublished - 2001
EventThermoelectric Materials 2000-The Next Generation Materials for Small-Scale Refrigeration and Power Generation Applications - San Francisco, CA, United States
Duration: Apr 24 2000Apr 27 2000


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