LTE Standard Module Series
EC21 Mini PCIe Hardware Design
EC21_Mini_PCIe_Hardware_Design 36 / 67
4
GNSS Receiver
4.1. General Description
EC21 Mini PCIe includes a fully integrated global navigation satellite system solution that supports
Gen8C-Lite of Qualcomm (GPS, GLONASS, BeiDou/Compass, Galileo and QZSS). Additionally, it
supports standard NMEA-0183 protocol, and outputs NMEA sentences at 1Hz data update rate via USB
interface by default.
By default, EC21 Mini PCIe GNSS engine is switched off. It has to be switched on via AT command. For
more details about GNSS engine technology and configurations, please refer to
document [3]
.
4.2. GNSS Performance
The following table shows the GNSS performance of EC21 Mini PCIe.
Table 16: GNSS Performance
Parameter
Description
Conditions
Typ.
Unit
Sensitivity
(GNSS)
Cold start
Autonomous
-146
dBm
Reacquisition
Autonomous
-157
dBm
Tracking
Autonomous
-157
dBm
TTFF
(GNSS)
Cold start
@open sky
Autonomous
35
s
XTRA enabled
18
s
Warm start
@open sky
Autonomous
26
s
XTRA enabled
2.2
s
Hot start
@open sky
Autonomous
2.5
s
XTRA enabled
1.8
s