Error detection/correction and fault detection/recovery – Pulse or data error handling – Error count or rate
Reexamination Certificate
2008-01-29
2008-01-29
Louis-Jacques, Jacques (Department: 2112)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Error count or rate
C375S240030
Reexamination Certificate
active
10888167
ABSTRACT:
The present invention relates to a pre-processing apparatus using nonuniform quantization of a channel reliability value and a low density parity check (LDPC) decoding system. The pre-processing apparatus can present degradation in performance and be embodied simply by performing decoding pre-process by estimating a discrete channel reliability value (Lc*) through nonuniform quantization of a channel reliability value based on a relations between a bit error rate (BER) estimated through a simulation performed in advance and a standard deviation (σ) of channel noise within a predetermined range of noise estimation error and p, and bit-shifting a receiving signal as much as a discrete channel reliability value. The pre-processing apparatus includes: a channel reliability measuring unit, a nonuniform quantizing unit, a sign bit adding unit, a bit shifting unit.
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“Iterative Decoding Algorithms Updating Likelihood and Channel Values Based on Interim Hard Decision Resuts”, ISIT 2000, Sorrento, Italy, Jun. 25-30, 2000, pp. 174.
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Establishment of Optimal Parameters for Implementing the LDPC Decoder, The 8th International Conference on Cellular and Intelligent Communications, Oct. 28-31, 2003.
Cho Sung-Jun
Choi Eun-A
Jung Ji-Won
Kim Nae-Soo
Lee In-Ki
Blakely & Sokoloff, Taylor & Zafman
Electronics and Telecommunications Research Institute
Louis-Jacques Jacques
Rizk Sam
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