Simone Morosi Romano Fantacci Enrico Del Re Leonardo Goratti Performance of the bi-orthogonal modulation for ultra-wideband communication systems with multiple access interference. 5-14 2005 5 Wireless Communications and Mobile Computing 1 http://dx.doi.org/10.1002/wcm.283 db/journals/wicomm/wicomm5.html#MorosiFRG05