This document defines a method for FIR system modelling which is very trivial as it only depends on phase introduction and removal (allpass filters). As magnitude is not altered, the processing is numerically stable. It is limited to phase alteration which maintains the time domain magnitude to force a system within its linear limits.

翻译：本文档定义了一种FIR系统建模方法，该方法仅依赖于相位引入与移除（全通滤波器），因此极为简单。由于幅度未发生改变，该处理过程在数值上保持稳定。该方法局限于相位变换，通过维持时域幅度使系统始终处于线性工作范围内。