Three types of adaptive filters, the adaptive prediction error filter (APEF), the two-side tapped adaptive transversal filter(ATF) and the adaptive lattice filter (ALF), are considered.

• 文中考虑了三种结构的自适应滤波器:自适应预测误差滤波器、双边抽头自适应横向滤波器和自适应格形滤波器,并提出了一种适用于QPSK直接序列扩展频谱系统的自适应格形滤波器,我们称之为自适应柱格形滤波器。