A cooperative coding scheme based on OFDM system

Authors:
Chaowei Wang;Lihua Li;Yongtai Xu;Dajian Wang
Affiliations:
Key Laboratory of Universal Wireless Communication, Beijing University of Posts and Telecommunications, Ministry of Education, Beijing, P.R.China;Key Laboratory of Universal Wireless Communication, Beijing University of Posts and Telecommunications, Ministry of Education, Beijing, P.R.China;Key Laboratory of Universal Wireless Communication, Beijing University of Posts and Telecommunications, Ministry of Education, Beijing, P.R.China;Center for Information and Educational Techniques, Xi'an University of Finance and Economics, Xi'an, P.R.China
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

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Abstract

In this paper, a relay cooperative scheme is proposed for cellular OFDM system. In the scheme, mobile station (MS) reorganizes and recombines the bits stream, and base station (BS) combines the signals from the two independent paths, direct and relay links; at the relay, signals are redesigned. And two relay modes are provided for different scenarios. Furthermore, a supplementary strategy of sub-carriers re-allocation is proposed to enhance the system. Finally, numerical simulation results show that the proposed scheme achieves transmit diversity and improves system performance.