OFDM和MIMO系统中的快速注水功率分配算法

Power Allocation Based on Fast Water-filling for OFDM and MIMO

针对传统注水算法需要进行复杂的搜索注水线计算的特点,提出了一种新的低计算复杂度的快速注水算法。在多信道无线通信系统中,注水算法是在给定功率下最大化系统容量的基本功率分配算法。通过对注水问题的分析,利用注水性质快速调整注水线从而移除了复杂的搜索注水线计算。仿真结果表明,与已有的算法相比,提出的算法节省了大量的计算时间。

Because traditional water-filling algorithm need complicated calculation for searching water-level to overcome this problem, a new simple and fast water-filling algorithm is proposed. Water-filling is a fundamental power allocation mechanism for capacity maximization under a given total transmit power. Through analysis of water-filling problem, take advantage of properties of water-filling, agilely adjusting water-level instead of processing complex water-level searching process. Simulation results show that compared with existing algorithms, proposed algorithm run multiple times faster.