Abstract: A novel systematic and irregular generalized low-density code with zigzag component(ZS-IGLDPC) was pro- posed in this paper. hhe sequences of degree distribution was designed by Gaussian approximation based density evolu- lion under the additive Gaussian white noisy channel. The performance of ZS-IGLDPC was analyzed by simulation. The simulation results show that the bit error rate of ZS-IGLDPC codes is less than other available codes for short and medi- um code length.

Key words: Generalized low-density parity-check(GLDPC}，I_ow-density generator matrix(LDGM)，Concatenated codes,Iterative decoding,Zigzag codes