Design of Finite Word Length Linear-Phase FIR Filters in the Logarithmic Number System Domain

Figure 11

Approximation error as a function of logarithm base. ((a), (b)) Spec. 3, 𝑄(3,𝑦), 𝑄(4,𝑦). ((c), (d)) Spec. 6, 𝑄(3,𝑦), 𝑄(4,𝑦). 𝑁=34.

(a)

(b)

(c)

(d)