Hybrid ARQ for LDPC-Coded System
Yingjian Xue, Eecs Peking · Acta Scicentiarum Naturalum Universitis Pekinesis · 2004
For the detected error words by the LDPC decoder, the characteristics of code bits reliability information is investigated. An efficient novel hybrid automatic repeat request (HARQ) scheme is proposed for system coded with Low-Density Parity Check (LDPC) codes. Compared with the Reliability-based hybrid ARQ (RB-HARQ), the new HARQ scheme outperforms the RB-HARQ in consideration of the bit transmission power for the requesting messages in the backward transmission channel. Simulation results show that the new H-ARQ scheme is more practical than RB-HARQ.