本文研究任意长度线性相位余弦调制滤波器组的快速实现，利用其原型滤波器的对称性，得到了一种更为有效的实现结构，与传统实现不同，新的实现结构使用２ ×２ 无损格型滤波器代替２ ×１ 无损格型滤波器，而格型滤波器的个数减少了一半，由此有效地降低了滤波器组的实现复杂度 In this paper, a fast implementation of an arbitrary length linear phase cosine-modulated filter bank is studied. By using the symmetry of its prototype filter, a more effective implementation structure is obtained. Compared with the traditional implementation, the new implementation uses 2 × 2 lossless Type filter instead of a 2 × 1 lossless filter, and the number of the lattice filter is reduced by half, thereby effectively reducing the implementation complexity of the filter bank