针对解码转发OFDM(orthogonal frequency division multiplexing,OFDM)两跳中继链路,研究了以系统能效最优为目标的链路功率分配优化算法.首先考虑系统的电路功耗,将其建模为速率的线性增函数;然后在满足链路速率和误码率的限制条件下,建立了链路能效优化目标函数;最后,基于凸优化理论,求得使链路能效最优的调制方式和功率分配.仿真结果表明,所提功率分配算法,能够使解码转发OFDM两跳中继链路的能效达到最优.
Power allocation for optimal energy efficiency in decode-and-forward OFDM relay Links
This paper studies the optimization algorithm of power allocation in decode and forward OFDM two hop relay links aiming to maximize the energy efficiency of the system.First,the circuit power consumption of the system is taken into account and modeled as a linear increasing function of the rate.Then,under the condition of satisfying the rate and bit error rate,the energy efficiency optimization objective function is established.Finally,based on convex optimization theory,the optimal modulation and power allocation of optimal energy efficiency are obtained.The simulation results show that the proposed power allocation algorithm can lead to the optimum energy efficiency.
relayOFDMdecode and forwardenergy efficiencypower allocation
NETL
NSTL
万方数据
维普
