Outage Performance of Cross-Packet HARQ

As opposed to hybrid automatic repeat request with incremental redundancy (HARQ-IR) that all the resources are occupied resend redundant information, cross-packet HARQ (XP-HARQ) allows introduction of new information into retransmissions substantially exploit remaining resources. This letter provides a profound investigation outage performance XP-HARQ. In particular, exact expression XP-HARQ is derived if maximum number transmissions two, and tight bounds obtained for more than two transmissions. Moreover, asymptotic analysis in high signal-to-noise ratio (SNR) regime carried out not only simplify expression, but also show full time diversity achievable by The simulation results eventually presented verifications.