SNR-based power allocation in wireless parallel amplify-and-forward relay transmissions

作者：Wang Jun Bo^*; Cao Zhe; Chen Ming; Jiao Yuan

来源：Acta Electronica Sinica, 2011, 39(7): 1663-1667.

• Amplify-and-forward
• Power allocations
• Relay
• Signal to noise
• Wireless communications

In wireless communications, efficient power allocation has the advantage of reducing resource consumption, achieving better quality-of-service (QoS), and reducing network interference. This paper is focus on the power allocation problem in wireless parallel amplify-and-forward relay transmissions. Particularly, the objective is set to minimize the transmit power of the communication nodes while guaranteeing the signal-to-noise ratio (SNR) requirement at the destination node. Firstly, based on the established channel model of wireless relay cooperative communication system, the expression of SNR is derived. Following that, the power allocation problem is modeled as a combinatorial optimization problem. Moreover, using convex optimization theory, this paper proposes a suboptimal power allocation algorithm with low complexity. The simulation results show that the method proposed in this paper is capable of resolving the power allocation problem in wireless relay communication systems with low computational complexity as well as stable performance.

• 出版日期2011
• 单位南京航空航天大学