Low Density Parity Check (LDPC) code, decoding, look-up table
This paper describes an efficient implementation of the Sum-Product Algorithm (SPA) within a Low Density Parity Check (LDPC) code decoder, where a horizontal process correction term is used to improve the decoding performance of the Min-Sum algorithms. The correction term is implemented as a look-up table. The algorithm uses the correction term redundancy by means of a coordinate transformation to reduce the hardware complexity. Simulations and hardware tests indicate that the decoding performance is very good with the appropriate look-up table.
Tsinghua University Press
Chen Qian, Weilong Lei, Zhaocheng Wang. Low Complexity LDPC Decoder with Modified Sum-Product Algorithm. Tsinghua Science and Technology 2013, 18(1): 57-61.