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

Table 2

Comparison of first two variable selection schemes.

(a)

Scheme	Branching direction	Number of nodes
		Spec. 1; 𝑁=64	Spec. 2; 𝑁=42	Spec. 3; 𝑁=34
1	L	30704	1410	948
	H	11113942	238320	20494
2	L	82336	5990	1088
	H	3887918	458974	12342

(b)

Scheme	Branching direction	Number of nodes
		Spec. 4; 𝑁=20	Spec. 5; 𝑁=34	Spec. 6; 𝑁=26
1	L	378	1334	210
	H	4256	38650	13352
2	L	365	1940	356
	H	3710	37248	17190