Date Added: Aug 2009
In this paper, the authors propose a Differential Linear Dispersion Coded (DLDC) cooperative transmission scheme suitable for Vehicular Ad hoc NETworks (VANETs), which facilitates striking a flexible diversity-multiplexing gain tradeoff without requiring channel estimation both at the cooperating nodes and at the destination node. More specifically, DLDC encoding is employed by the source transmitter for broadcasting the source information to the relays; while an LDC-based amplify-and-forward relaying scheme is used at the relays. The proposed technique allows each relay to decide, whether it joins the cooperating cluster without any negotiations with the other nodes. The destination's receiver detects the DLDC-encoded symbols using a low-complex detection algorithm, rather than an exhaustive Maximum Likelihood (ML) search.