Hardware+Design V1.07

Smart Machine Smart Decision
available network data back to the location server, the mobile calculates the location on the handset and
passes the result to the requesting entity.
In standalone (autonomous) mode, the handset demodulates the data directly from the GPS satellites.
This mode has some reduced cold-start sensitivity, and a longer time to first fix as compared to the assisted
modes. However, it requires no server interaction and works out of network coverage.
This combination of GPS measurements and available network information provides:
● High-sensitivity solution that works in all terrains: Indoor, outdoor, urban, and rural
● High availability that is enabled by using both satellite and network information
Therefore, while network solutions typically perform poorly in rural areas and areas of poor cell
geometry/density, and while unassisted, GPS-only solutions typically perform poorly indoors. The
SIM5320 GPS solution provides optimal time to fix, accuracy, sensitivity, availability, and reduced
network utilization in both of these environments, depending on the given condition.
3.12.3 Application Guide
Users can adopt an active antenna or a passive antenna as GPS signal transceiver. In this document, all
GPS specification mentioned is from passive antenna. The following is the reference circuit.
80
MODULE
79
GPS_ANT
GND
78
GND
Matching circuit
RF test connector
L1
VDD
BEAD
L2
Figure 37: Active antenna circuit
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