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

Figure 12

Approximation error as a function of logarithmic base with different word length. ((a), (b)) Spec. 3, 𝑄(3,4), 𝑄(4,4). ((c), (d)) Spec. 6𝑄(3,4), 𝑄(4,3). 𝑁=34.

(a)

(b)

(c)

(d)