Toshiaki Koike-Akino Petar Popovski Vahid Tarokh Denoising Maps and Constellations for Wireless Network Coding in Two-Way Relaying Systems. 3790-3794 2008 GLOBECOM http://dx.doi.org/10.1109/GLOCOM.2008.ECP.727 conf/globecom/2008 db/conf/globecom/globecom2008.html#Koike-AkinoPT08