9.2.1 Features of Adaptive Filters-Filtering structure Q&A for understanding“Filtering Structure'” Q1:What is the purpose of adaptive filter? Form the output using measurements of the input signals Q2:What is the structure for implementing an adaptive filter? (1)FIR filter using a direct/lattice structure; (2)Recursive filter using a cascade structure. Q3:What does the“adaptive”means? Although the structure of adaptive filter is fixed by the designer,its parameters can be dynamically adjusted by the "adaptive algorithm"Q&A for understanding “Filtering Structure” 9.2.1 Features of Adaptive Filters－ Filtering structure Q1: What is the purpose of adaptive filter? Form the output using measurements of the input signals Q2: What is the structure for implementing an adaptive filter? (1) FIR filter using a direct/lattice structure; (2) Recursive filter using a cascade structure. Q3: What does the “adaptive” means? Although the structure of adaptive filter is fixed by the designer, its parameters can be dynamically adjusted by the “adaptive algorithm