D-MG Tradeoff and Optimal Codes for a Class of AF and DF Cooperative Communication Protocols
Petros Elia, K. Vinodh, M. Vijay Anand, P. Vijay Kumar · IEEE Transactions on Information Theory · 2009
Cooperative relay communication in a fading channel environment under the orthogonal amplify-and-forward (OAF), nonorthogonal and orthogonal selection decode-and-forward (NSDF and OSDF) protocols is considered here. The diversity-multiplexing gain tradeoff (DMT) of the three protocols is determined and DMT-optimal distributed space-time (ST) code constructions are provided. The codes constructed are sphere decodable and in some instances incur minimum possible delay.