Hamid-Reza Bahrami 0002 Tho Le-Ngoc Maximum Ratio Combining Precoding for Multi-Antenna Relay Systems. 97-103 2010 2 Commun. Netw. 2 https://doi.org/10.4236/cn.2010.22016 db/journals/comnet/comnet2.html#BahramiL10