Cooperative Networks Power Allocation Scheme for Two-Way Opportunistic Relaying

The research of this paper is based on two-way opportunistic relaying system (TWOR) of AF (amplify and forward) protocol. Although these systems used in Wireless network coverage are widely concerned because of its simplicity and high spectrum efficiency, there is little work to study theoretical performance and power allocation problems of these systems. In this paper, firstly giving performance analysis of these TWOR-AF systems under equal power allocation, program includes system outage probability and symbol error rate. These analytic results provide theoretical direction for system designer. Second, to improve the performance of TWOR-AF system in a further step, there also proposes two programs of power allocation, which are optimum power allocation based on channel instantaneous strength and channel statistic characteristics based on Sub-OPA. Simulation result test and verify the accuracy of theoretical analysis result and effectiveness of power allocation program.