To achieve a desirable tradeoff between efficiency and fairness, all users are given a guaranteed transmission rate.An amendatory four-step algorithm with fairness constraint is described.

• 考虑到实际应用系统中效率与公平的折中，对各个用户定义相应的速率约束，以增加功率最小为原则，给出了改进的兼顾公平的子载波分配算法的具体步骤。