Distributed Arithmetic for Efficient Base-Band Processing in Real-Time GNSS Software Receivers

Table 3

Truth table of the carrier mixer.

Mixer output		Local carrier {𝐶1(𝑛),𝐶0(𝑛)}
{𝑆I,3(𝑛),𝑆I,2(𝑛),𝑆I,1(𝑛),𝑆I,0(𝑛)}		00	01	10	11
Signal {𝑆1(𝑛),𝑆0(𝑛)}	00	0001	0010	1110	1101
	01	0011	0111	1100	1000
	10	1110	1101	0001	0010
	11	1100	1000	0011	0111