Rotationally invariant space-time trellis codes with 4-D rectangular constellations for high data rate wireless communications. - Corneliu Eugen D. Sterian; Cheng-Xiang Wang 001; Ragnar Johnsen; Matthias Pätzold 001 (J. Commun. Networks, 2004)

Mixed signal system design (A project based course). - Linga Reddy Cenkeramaddi; Ragnhild Terese Veimo Larsen; Ragnar Johnsen; Magne Arild Haglund (EWME, 2014)