Abstract:

Based on the investigation of the low density parity check (LDPC) codes’ layered decoding algorithm in additive white Gaussian noise (AWGN) channel, an improved layered decoding algorithm based on integer operation is proposed for decoding LDPC codes. All the variables are indicated as integers in the proposed algorithm, so it is very convenient for implementation in hardware. At the same time, a modified factor is introduced to improve the layered decoding algorithm. With this modified factor, its decoding performance is improved greatly. Simulation results in AWGN channel show that the improved layered decoding algorithm can not only reduce the computation complexity and accelerate the convergence rate, but also have a lower error floor.