Frequency-Based Optimization Design for Fractional Delay FIR Filters with Software-Defined Radio Applications

Figure 6

Differentiators ideal responses (dot line) and approximations (solid lines). (a) Proposed method 𝜔_𝑝=0.45𝜋, 𝑁=12, and 𝐿=14. (b) Direct all band optimization 𝜔_𝑝=0.9𝜋, 𝑁=104, and 𝐿=12.

(a)

(b)