带中继节点的LTE仿真平台的设计

Mobile communication technologies develop rapidly, and LTE has been running in some countries, it has become the focus of many research institutions around the world. Plenty of institutions have their LTE platforms, however, few are considering the relay nodes. This paper puts emphasis on the design of simulation platform with relay nodes. The Relay nodes are of layer 2 mode, will decode and forwarding receiving data. Also the Relay nodes are in type1 mode, non-transparent to their users. Base station is responsible for the relay and users management. This relay platform has relay users and macro users, the relay users receive signal from direct link and relay link both. This paper raises an improved LTE maximal ratio combining algorithm to combine the two link signals. The simulation results show that the performance of system with relay is better than system without relay, and the key point of relay system is backhaul links.