Outage Probability and Adaptive Power Allocation in Wireless Cooperative Communications
In this paper, we develop an adaptive power allocation algorithm to minimize the outage probability in a two-hop single-relay wireless cooperative communication system under the average transmit power constraint. The adaptation is carried out in the time domain according to the channel state information (CSI), so a priori information of the channel is assumed. We analyze the outage performance in two different cooperation modes, i.e., amplify-and-forward (AF) and decode-and-forward (DF). We also study the impact of spectral efficiency and distance between nodes on outage performance. To facilitate the comparison, the outage performance of direct transmission is also analyzed as a baseline. Numerical results show that compared with fixed power allocation, adaptive power allocation has much better outage performance.
power allocation outage probability cooperative communication
Wendong Yang Yueming Cai Chengkang Pan
Institute of Communications Engineering,PLAUST,Nanjing 210007,China
国际会议
武汉
英文
2006-09-01（万方平台首次上网日期，不代表论文的发表时间）