Zhan Yu Ping Luo Suguru Fujita Pulse Mapping for Impulse Radio Ultra Wideband Communications. 1-5 2006 conf/vtc/2006f VTC Fall http://doi.ieeecomputersociety.org/10.1109/VTCF.2006.218 db/conf/vtc/vtc2006f.html#YuLF06