Baseband Hardware Designs in Modernised GNSS Receivers - Global Navigation Satellite Systems: Signal,Theory and Applications - page 45

Correlation computation
(x Number of channels)

L1/E1 IF
Signal

L1 core
E1 core

L2C IF
Signal

Mux

L2C core

L5/E5 IF
Signal

L5 core
E5 core

Interface
Controller

Code
memory
blocks (all
PRNs)

Mux /
Demux
and
Controller

Local signal
generation (for all
channels)

Fig. 4. Components of the baseband module for GPS L1/L2C/L5 and Galileo E1/E5 signals

Signal /
Component

Correlator
Operating
Frequency
(MHz)

Resource Utilisation Power

estimate
(mW)

Registers Combina-
tional

Memory
(bits)

GPS L1 C/A 4 446 151 - 1.06

Galileo E1b or E1c 8 436 149 4092 1.84

Galileo E1 (E1b and
E1c)

8 631 176 8184 2.24

GPS L2C CM only 4 478 210 - 1.13

GPS L2C (CM and
CL)

4 737 245 - 1.61

GPS L5 (Pilot and
Data)

40 701 204 - 11.93

Galileo E5a or E5b 40 694 203 - 11.80

Galileo E5 100 1010 253 - 39.28

Table 2. Resource utilisation and power consumption estimates of the core correlator (single
channel) for different signals