Analysis of SER performance for cooperative communications with different power allocation and relay location

作者：Lin Fei^*; Luo Tao; Yue Guang Xin

来源：Proceedings of the CSEE, 2008, 28(19): 101-105.

• Amplify and forward (AF)
• Cooperative communication system
• Cooperative communications
• Equal power allocation (EPA)
• Optimum power
• Performance improvements
• Power allocation (PA)
• PSK modulations
• Relay location
• Upper bounds

The symbol-error-rate (SER) performance is analyzed for a two-user amplify-and-forward cooperative communication system when the relay is movable and immoveable. By making use of M-PSK modulation, a closed-form SER formulation and corresponding upper bound are derived. Then the approximately optimum power allocation (OPA) method is given to minimize the SER performance. With the OPA and equal power allocation (EPA) method, the influence of relay location on SER is discussed by making use of a simple ellipse topology. Exact optimum relay location is the mid-point between the source and destination with EPA, while it is near the destination with OPA case. Furthermore, the OPA method outperforms the EPA case with a SER performance improvement whether the relay is moveable or not.

• 出版日期2008
• 单位北京大学