保证准确无误，是学习通信的好帮手，最大似然（ML）准则和最大后验概率（MAP）准则，窗函数法设计一个数字带通FIR滤波器。- Ensure accurate communication is learning a good helper, Maximum Likelihood (ML) criteria and maximum a posteriori (MAP) criterion, A window function design FIR digital band-pass filter.