TY - GEN
T1 - Energy-efficient LDPC decoders based on error-resiliency
AU - Kim, Eric P.
AU - Shanbhag, Naresh R
PY - 2012
Y1 - 2012
N2 - Low density parity check (LDPC) codes are used in various communication standards. However, LDPC decoders are complex and power hungry. In this paper, we present an energy-efficient LDPC decoder based on statistical error compensation (SEC). Three different size LDPC codes, (50, 25), (800, 400), and (1800, 900) were implemented with 5 iterations/block. Circuit simulations in a commercial 45 nm process show that the SEC based LDPC decoder can operate at a supply voltage up to 38% less than the nominal voltage and tolerate up to 30× more errors over an SNR range of 3 dB to 8 dB, while maintaining less than 3× degradation in BER. This is equivalent with energy savings of 45.7% compared to conventional LDPC decoders, and 33.2% compared to a sign bit protected LDPC decoder.
AB - Low density parity check (LDPC) codes are used in various communication standards. However, LDPC decoders are complex and power hungry. In this paper, we present an energy-efficient LDPC decoder based on statistical error compensation (SEC). Three different size LDPC codes, (50, 25), (800, 400), and (1800, 900) were implemented with 5 iterations/block. Circuit simulations in a commercial 45 nm process show that the SEC based LDPC decoder can operate at a supply voltage up to 38% less than the nominal voltage and tolerate up to 30× more errors over an SNR range of 3 dB to 8 dB, while maintaining less than 3× degradation in BER. This is equivalent with energy savings of 45.7% compared to conventional LDPC decoders, and 33.2% compared to a sign bit protected LDPC decoder.
KW - Error resiliency
KW - LDPC
KW - Low power
UR - http://www.scopus.com/inward/record.url?scp=84875342534&partnerID=8YFLogxK
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U2 - 10.1109/SiPS.2012.60
DO - 10.1109/SiPS.2012.60
M3 - Conference contribution
AN - SCOPUS:84875342534
SN - 9780769548562
T3 - IEEE Workshop on Signal Processing Systems, SiPS: Design and Implementation
SP - 149
EP - 154
BT - Proceedings - 2012 IEEE Workshop on Signal Processing Systems, SiPS 2012
T2 - 2012 IEEE Workshop on Signal Processing Systems, SiPS 2012
Y2 - 17 October 2012 through 19 October 2012
ER -