Date Added: Dec 2009
The authors evaluate the performance improvement in Orthogonal Frequency-Division Multiplex Access (OFDMA) achievable with cooperative relaying in the presence of frequency offsets. The relays can operate in either the Amplify-and-Forward (AF) or Decode-and-Forward (DF) mode. In each transmission, node S has M relays when transmitting its own signal and it also helps the other M relays transmit their signals. The total power used to transmit each symbol, including the power consumed in S and the relays, is kept constant.