An ARQ technique using related parallel and serial concatenated convolutional codes

We propose a new type-II code-combining hybrid automatic repeat request (ARQ) strategy that uses both parallel and serial concatenated convolutional codes (PCCCs and SCCCs). The ARQ technique is based on the observation that a PCCC can be represented by an equivalent punctured SCCC. The initial transmission is the PCCC. When a retransmission is requested, the system only transmits the additional parity bits that, together with the previously transmitted PCCC bits, constitute the related SCCC. Simulation results show remarkable power efficiency and throughput efficiency when using the proposed system