Fixed fragment-size packet transmissions with distributed redundancy over multipath fading channels

Standardized wireless transmissions include fixed-size fragments per packet. Relying on this structure, we develop two schemes for distributing redundancy across fragments, in order to improve performance of packet transmissions over frequency-selective fading channels. We prove that both schemes guarantee symbol detectability, which implies that they both enable the full multipath diversity. We test their relative merits, and compare them with competing alternatives using simulations.