Joint use of cooperative diversity and network coding in Asymmetric Two-Way Relay Channel

In this paper, we proposed a scheme for asymmetric data transmission in Three-Point Cooperative Communication System with asymmetric channel coding and network coding. Wireless communication environment is varied, and the conditions of the communication link are not the same either. The scheme with asymmetric channel coding ensures the reliability of communication in the poor environment. Meanwhile, it transmits more data in better links to make full use of system resources. Through cooperative diversity, the destination can receive multiple copies of the information to achieve a diversity gain in wireless communication systems. Appling network coding in relay can increase the communication efficiency and can enhance the coding performance of the system. Simulations show that asymmetric coding adds more redundancy in poor links not only can ensure the reliability, but also transmit more information in better links. Meanwhile, cooperative diversity can enhance the reliability of decoding with providing multiple copies of the information, and it also reduces the system bit error rate.