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 language||English (US)|
|Journal||Materials Research Society Symposium - Proceedings|
|State||Published - 2001|
|Event||Thermoelectric Materials 2000-The Next Generation Materials for Small-Scale Refrigeration and Power Generation Applications - San Francisco, CA, United States|
Duration: Apr 24 2000 → Apr 27 2000