Navi-xs User’s Guide
Version 1.01
4 TECHNICAL DESCRIPTION
4.1 Bluetooth™ GPS Receiver architecture
The NAVI-XS OEM GPS receiver from FALCOM is a new OEM product that features
the SiRFstarIIx single chipset. The core of NAVI-XS is comprised of the GSC2x - that
includes the Digital and RF in a single chip. The flexibility of the core allows the core
processing engine to track up to 12 satellites. The core of NAVI-XS contains a built in
sequencer, which handles all the high-rate interrupts for GPS tracking and
acquisitions. After initialization, the receiver handles all the time critical and low
latency acquisition, tracking and reacquisition tasks of GPS autonomously. The on-
chip SRAM size is 1-Mbit memory that is used for instructions. The internal XTrac 2.0.2
software stored in the 8 Mbit FLASH completes the package providing flexible system
architecture. The data delivered from GPS receiver will be sent via Bluetooth™
antenna to the host device (to the connected Bluetooth™ enabled device).
Figure 4:
The architecture of NAVI-XS Bluetooth™ GPS receiver
4.2 Technical specifications
4.2.1 Electrical
Characteristics
4.2.1.1 General
Frequency L1,
1575.42
MHz
C/A code
1.023 MHz chip rate
Channels 12
4.2.1.2 Accuracy
Position
10 meters CEP without SA
Velocity
0.1 meters/second, without SA
Time
1 microsecond synchronized to GPS time
4.2.1.3 Datum
WGS-84
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