介绍了OFDM技术的基本原理及系统实现，并分析了OFDM系统的优缺点；接着论述了自适应比特功率分配算法的原理和步骤，同时还着重介绍了注水算法，并对该算法进行了实验仿真，进一步论证了该算法是最优的功率分配算法-introduces the basic principle and implementation of the OFDM system firstly, and analyzes the advantages and disadvantages of the OFDM system. Th

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