Improved Decode-and-forward Multihop Relay System and Optimal Power Allocation
Yang Jie, Rui Xiongli, Xuehong Cao · Jisuanji gongcheng · 2013
In view of the inferior outage performance of multihop channel and the complex receiver of multihop diversity channel,an improved Decode-and-forward(DF) multihop relay system is proposed based on DF multihop relay system and DF multihop diversity relay system.The proposed system can realize a tradeoff between system performance and complexity.Outage probability of the proposed system is derived,and power allocation optimization problem is formulated and evaluated by minimizing the outage probability with the use of lagrange multiplier method.Simulation results show that the proposed system has better outage performance than traditional multihop relay systems.Besides,the optimum power allocation can enhance system performance,especially if the number of relays is large.