NX3 GPS chip

The NX3 is a low power single chip, RF and baseband
processor, for indoor assisted Global Positioning System
(A-GPS) and enhanced performance stand alone GPS
applications. With the companion navigation software, all
components are provided to smoothly integrate A-GPS into
an existing host system and exceed the 3GPP 25.171 and
TIA-916 performance requirements.
Based on a hosted architecture, the NX3 reuses the
processor, memory, interfaces and system support
functions of the target system achieving the lowest possible
Bill of Material (BOM) and board real-estate. The NX3
navigation software places no real time constraints on the
host processor, occupies a minimal memory footprint and
requires between 5 to 10 MIPS, making the NX3 a low risk
solution for adding A-GPS location capabilities to a system.
The NX3 has been developed using NemeriX
methodologies for ultra low power consumption. The very
short fix time, paired with the low power, low noise GPS
front end provides minimal energy to fix but also continued
low power consumption during harsh indoor navigation
conditions.
Both U-plane and C-plane A-GPS modes are supported,
without any compromise in autonomous operation. The
tracking sensitivity is as low as -159dBm, Time To First Fix
(TTFF) is typically less than 1s outdoor and 10s indoor
while accuracy (RMS) goes from 3m outdoor to 12m
indoor. A powerful correlation engine supports
asynchronous and synchronous networks equally well. The
system accepts a large variety of clocking sources and
frequency plans.

A UART, SPI or I2C can be used to interface the NX3 to the
host system. The navigation software embedded in the host
processor offers an Application Programming Interface
(API) to implement assistance protocols via the user plane
(e.g. SUPL) or control plane (RRLP & RRC). The same API
can be used to develop LBS services directly interacting
with the A-GPS navigation engine.

Features and benefits
- Hosted, A-GPS for lowest cost and smallest size
- Low system impact and risk, no real time constraints
- Exceeds 3GPP and TIA performance requirements
- Ultra low power consumption
- UART, SPI slave or I2C slave host interface
- Assisted and stand alone operation
- Both asynchronous (e.g. GSM) and synchronous
(e.g. IS-95) networks supported
- SW API for tighter integration and added flexibility
- Targets fix-on-request and continuous navigation
- Packaging: 6x6mm, 0.5mm pitch, 111 balls, Max
height 1.35 mm (BGA)
- Lead-free, RoHS compliant

Applications
- Mobile phones and smart phones
- Personal Navigation Devices (PND) and Portable
Media Players (PMP)
- Digital Still Cameras (DSC)
- Asset tracking, fleet management
- Emergency applications (E911, E112)

NX3: low power single chip, RF and baseband
processor, for indoor assisted GPS (A-GPS) and enhanced performance stand alone.