Table 2: Gps Engine Performance - SimCom SIM808 Hardware Design

Firmware upgrade

Table 2: GPS engine Performance

Parameter Description
Horizontal Position Autonomous
Accuracy(1)
Velocity Without Aid
Accuracy(2)
DGPS
Acceleration Without Aid
Accuracy
DGPS
Timing Accuracy
Dynamic Maximum Altitude
Performance
Maximum Velocity
Maximum Acceleration
(3)
Time To First Fix Hot start
Warm start
Cold start
Sensitivity Autonomous
acquisition(cold start)
Re-acquisition
Tracking
Receiver Channels
Update rate
Tracking L1, CA Code
Protocol support NMEA
Power Acquisition
(4)
consumption
Continuous tracking
(1) 50% 24hr static, -130dBm
(2) 50% at 30m/s
(3) GPS signal level: -130dBm
(4) Single Power supply 3.8V@-130dBm,GSM IDLE
Table 3: Coding schemes and maximum net data rates over air interface
Coding scheme 1 timeslot
CS-1 9.05kbps
CS-2 13.4kbps
CS-3 15.6kbps
CS-4 21.4kbps
SIM808_Hardware Design_V1.00
Firmware upgrading by USB interface.
Min
2 timeslot
18.1kbps
26.8kbps
31.2kbps
42.8kbps
Performance
Type
<2.5
0.1
0.05
0.1
0.05
10
1
28
30
-147
-159
-165
22/66
42
24
4 timeslot
36.2kbps
53.6kbps
62.4kbps
85.6kbps
12
Smart Machine Smart Decision
Max Unit
m
m/s
m/s
2
m/s
2
m/s
nS
18000 m
515 m/s
4 G
s
s
s
dBm
dBm
dBm
5 Hz
mA
mA
2014.03.27