Information Technology Journal1812-56381812-5646Asian Network for Scientific Information10.3923/itj.2013.1220.1226YangHongjuan LiBo MengWeixiao 62013126Physical-layer Network Coding (PNC) is an efficient approach that can improve the system spectrum efficiency by allowing two different nodes to transmit their information to a common node simultaneously which can save more time slot resource compared with Network Coding (NC). In this study, for the purpose of further improving the performance of cooperative networks, a new cooperative diversity scheme which combines Decode-and-forward (DF) protocol and physical-layer network coding, is proposed for a two-hop cooperative system with multiuser. In the proposed scheme, users broadcast their information using quadrature carriers simultaneously and the relay node employs decode-and-forward mode. To check its validity, the Bit Error Rate (BER) and throughput of the proposed scheme, under different propagation cases, are investigated and compared with that of traditional decode-and-forward. The simulation results reveal that the proposed scheme can effectively improve the system performances.]]>Wang, K.H., C.Q. Zhang and J.L. Xu,2010912941305Hussain, G.A., M.B. Mokhtar and R.S.A.B. Raja,20114720727Sendonaris, A., E. Erkip and B. Aazhang,20035119271938Sendonaris, A., E. Erkip and B. Aazhang,20035119391948Laneman, J.N., D.N.C. Tse and G.W. Wornell,20045030623080Wang, J., X. Sha, L. Sun and Z. Zhang,2009810131019Tang, J. and L. Wang,201312239242Ahlswede, R., N. Cai, S.Y.R. Li and R.W. Yeung,20004612041216Li, S.Y.R., R.W. Yeung and N. Cai,200349371381Chieochan, S. and E. Hossain,201312118135Lin, H., Y. Lin and H. Kang,201324418Zhang, S. and S.C. Liew,200927788796Zhou, X., Y. Yang, H. Shan and Z. Wang,2010913531360Islam, T., A. Nasri, R. Schober, R.K. Mallik and V.K. Bhargava,20121131803193Peng, M., H. Liu, W. Wang and H.H. Chen,20105935773588