The application of network coding and cooperative diversity in asymmetric two-way relay channel

This paper proposed a scheme for asymmetric data transmission in three-point cooperative communication system with network coding. Since the scheme joint use both cooperative diversity and network coding, it can achieve the diversity gain and coding gain in wireless communication system. In this paper, the differences of wireless communication environment are fully considered. The scheme with asymmetric modulation ensures the reliability of communication in the poor environment. Meanwhile, it transmits more data in good links to make full use of system resource. The main idea to realize network coding of asymmetric data transmission is to add prior known information in the relay. The prior known information can enhance the coding performance of the system. Simulations show that the proposed transmission scheme can achieve the diversity gain and reduce the bit error rate compared to non-cooperative transmission system. In addition, it can improve the capacity of the communication system.