OFDMA系统中的功率与比特高效分配算法

High efficiency algorithm of power and bit allocation for OFDMA system

提出了一种于OFDMA系统中的功率与比特的高效分配算法,算法包括线性注水功率分配、比特分配和功率与比特调整3部分。采用这种算法能在用户间快速完成子载波的功率和比特分配,并且不会改变用户间的公平性能。仿真结果表明,与其他算法相比,该算法不需迭代运算,算法运算量明显下降,系统吞吐量略有下降,是一种可望应用在实际系统中的资源分配算法。

A high efficiency algorithm of power and bit allocation for OFDMA system was propose, which including three parts： linear water-filling power allocation, bit allocation and power and bit adjustment. It could quickly achieve the power and bit allocation between users, and would not change the fairness performance between users. Simulation results showed that, the proposed algorithm need not iteration and could obviously decrease the operation complexity with a slight descent in system throughput contrast to other algorithms. It was promising to be used in a practical system for radio resource allocation.