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Low complexity LDPC decoder with modified Sum-Product algorithm

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3 Author(s)
Chen Qian ; Tsinghua National Laboratory for Information Science and Technology, Department of Electronic Engineering, Tsinghua University, Beijing 100084, China ; Weilong Lei ; Zhaocheng Wang

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.

Published in:

Tsinghua Science and Technology  (Volume:18 ,  Issue: 1 )