Date Added: Mar 2013
The two-stage protocol for physical layer network coding for the two-way relay channel first introduced in 2006, exploits the multiple access interference occurring at the relay so that the communication between the end nodes can be done using a two stage protocol. The paper deals with the information theoretic studies for bidirectional relaying. In this paper, modulation schemes to be used at the nodes for uncoded transmission for the two-way relaying was studied. The work done for the relay channels with three or more user nodes is given.