本文基于快速卷积方案实现滤波多音调制(filtered multi-tone,FMT)系统,可以对子载波的中心频率及宽度进行灵活配置.针对传统FMT系统频谱效率低下的问题,提出以频率点为单位引入频谱重叠的新型FMT系统(overlapped FMT,O-FMT)研究方法.通过实验方法分析了O-FMT系统中重叠因子、频率点重叠点数及滚降因子与系统性能间的关系.仿真结果证明该方法可以同时处理多种波形,并能通过几个参数的最优配置满足多种业务场景对系统运算复杂度、频谱利用率、均方误差等不同的性能需求. In this paper, based on the fast convolution scheme, a filtered multi-tone (FMT) system can be configured flexibly for the center frequency and width of the subcarriers.For the problem of low spectral efficiency of the traditional FMT system, A new FMT (overlapped FMT) method is introduced to investigate the relationship between overlap factor, frequency point overlap factor and roll-off factor in O-FMT system and the system performance. The simulation results show that The method can process multiple waveforms at the same time, and can satisfy different performance requirements of various business scenarios on system operation complexity, spectrum utilization, mean square error and the like through the optimal configuration of several parameters.