滤波多音频技术及其滤波器组设计

Filtered multitone technique and the design of filter banks

提出了一种新型的多载波传输技术———滤波多音频(FMT)技术的基本原理和系统结构,并对系统进行了优化改进.分别将使用窗函数法和切比雪夫逼近法设计的原型滤波器应用于FMT仿真平台,通过仿真实验发现,使用切比雪夫逼近法设计的原型滤波器因其频率响应的通带锐截性能好,过渡带窄,性能优于使用窗函数法设计的原型滤波器.

The basic principle and system structure of a new multicarrier transmission technique filtered multitone modulation （FMT）are described, and the optimization of FMT is performed. The prototype filters designed by window function and Chebyshev approximation methods are applied in the system simulation platform, and the simulation shows that the performance of the prototype filter designed by the Chebyshev approximation method is better than that of the one designed by window function method because of its better performance of pass-band and narrower transition-band.