Leszek Szczecinski Hong Xu Xin Gao Rolando Bettancourt Efficient Calculation of BER for Arbitrary Modulation and Signaling in Fading Channels. 2006 conf/globecom/2006 GLOBECOM http://dx.doi.org/10.1109/GLOCOM.2006.99 db/conf/globecom/globecom2006cth.html#SzczecinskiXGB06