两跳中继系统中调度算法的改进及性能比较*

提出了一种改进的最大载干比和比例公平（Emax C/I & EPF）调度算法。首先根据到基站的距离，划分BS和RS域，然后分别在BS和RS域内采用改进的最大载干比（Emax C/I）算法和改进的比例公平（EPF）算法。将提出的改进算法（Emax C/I & EPF）分别与部分比例公平（PPF）算法、两跳比例公平（THPF）算法以及改进前的算法进行了比较。仿真结果证明，该改进算法（Emax C/I & EPF）在系统频谱效率性能与公平性能之间达到了较好的权衡。

Improvement of scheduling algorithm in two-hop relay systems and its performance comparison

This paper proposed the improved max C/I and PF scheduling algorithms. It firstly devided the relay system cellular into BS zone and RS zone according to the distance from BS. Then used the improved max compared C/I (Emax C/I) scheduling algorithm and the PF (EPF) scheduling algorithm in the BS zone and RS zone, respectively. Compared the system performance with the partial proportional fairness (PPF) scheduling algorithm, two-hop proportional fairness (THPF) scheduling algorithm, and the original max C/I and PF scheduling algorithm. Simulation results show that the proposed Emax C/I & EPF scheduling algorithm can provide the better tradeoff between spectral efficiency and users fairness in the system level.