Performance limits of amplify-and-forward based fading relay channels. - Rohit U. Nabar; Felix W. Kneubühler; Helmut Bölcskei (ICASSP (4), 2004)

Fading relay channels: performance limits and space-time signal design. - Rohit U. Nabar; Helmut Bölcskei; Felix W. Kneubühler (IEEE J. Sel. Areas Commun., 2004)