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Wireless Module Expert
Quectel Wireless Solutions
L30 GPS Module Presentation
May 2011
www.quectel.com
Contents
General description
- Highlights- Mechanical Dimension- Hardware Architecture- Software Technology- Target Applications
High Sensitivity GPS Engine
- Advantages of Engine- ROM Introduction
Features
- Self-Assisted CGEE- Receiver Performance- Low-power Design
Support Package
Quectel
Confidential
www.quectel.com
Highlights
SiRFstarIV™ GSD4e GPS engine
48 track verification channels-163 dBm tracking sensitivity
Multiplex interface
UART / SPI / I2C
Smallest SMD GPS module
9mmx9mmx1.6mm
Anti-jamming
removes in-band jammers up to 80 dB-Hz
Adaptive low-power
10mW for 1Hz output rateonly 50 ~ 500 uA to maintain hot start
Self-Assisted GPS (CGEE)
Up to 3 days of predictionQuectel
Confidential
www.quectel.com
Mechanical Dimension
Length: 9.0 mmWidth: 9.0 mmHeight: 1.6 mmWeight: 0.6g
Quectel
Confidential
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Hardware Architecture
RF Front-End With
Integrated LNA
Fractional-N
Synthesizer
GPS
Engine
ROM
Saw
FilterPower
Management
ARM7
ProcessorPeripheral
Controller
RTC
VCC
VIO/RTC
UART/SPI/I2C
RESET
EINT0
1PPS
RF_IN
ON/OFF
WAKEUP
Optional
EEPROM
For CGEE
DR_I2C
Match
Network
RAMQuectel
Confidential
www.quectel.com
Software Technology
SiRFstarIV™ GSD4e ROM1.3 Firmware Version
• The newest SiRF MP firmware with more functionalities
Protocol
• NMEA 0183 standard protocol V3.01 and backward compliance
• SiRF OSP binary protocol
Configurable Operating Modes
• Selectable baud rates
• Navigation initialization
• Selectable output massages
• Optional source of Differential GPS
Quectel
Confidential
www.quectel.com
Target Applications
Portable Devices
Tracking and Tracing
Connected PND
GIS Application
Security System
Industrial PDAQuectel
Confidential
www.quectel.com
Contents
General description
- Highlights- Hardware Architecture- Software Technology- Mechanical Dimension- Target Applications
High Sensitivity GPS Engine
- Advantages of Engine- ROM Introduction
Features
- Self-Assisted CGEE- Receiver Performance- Low-power Design
Support Package
Quectel
Confidential
www.quectel.com
Advantages of engine
The performances of SiRF Star IV are much better than Star III.
Product Features SiRF Star IV SiRF Star III
Sensitivity -163dBm (tracking) -159dBm (tracking)
Track channels 48 20
AGPS with CGEE Support Not support
Communication ports UART, I2C, SPI UART
Size Small Big
Onchip LNA Integrated Not integrated
CW jammer remover Track and remove up to 8 CW Not support
Quectel
Confidential
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ROM Introduction
SiRFstarIV™ GSD4e GPS engine schedules the generation of ROM
firmware to extend more advanced features.L30 uses the newest version – ROM1.3
ROM1.3 • Improved the shortcomings of the last version• All-around functionalities are integrated in the module without using the extra Patch• Automatically use the CGEE data from EEPROM. Additional commands are
unnecessary
ROM2.0 - available at the end of 2011• Adaptive uPower 125uA with optional Accelerometer interrupt• 5Hz navigation update rate• Compass heading with the help of 3-D Magnetometer
Quectel
Confidential
www.quectel.com
Contents
General description
- Highlights- Hardware Architecture- Software Technology- Mechanical Dimension- Target Applications
High sensitivity GPS Engine
- Advantages of Engine- ROM Introduction
Features
- Self-Assisted CGEE- Receiver Performance- Low-power Design
Support Package
Quectel
Confidential
www.quectel.com
Self-Assisted CGEE (1)
Shortcomings of Standalone GPS• Receiving ephemeris from satellites needs over 30 seconds• In the condition of weak signals, it is more difficult to fix.
Shortcomings of Traditional online A-GPS (SUPL, uB*** - AssistNow online)
• Require the wireless network coverage areas.• Consume time to establish a wireless connection
and receive data.
Shortcomings of Traditional offline A-GPS (uB*** - AssistNow offline)
• Periodic request of offline data. It is inconvenient for end-users.• Customers must provide service for download data for end-users.
Quectel
Confidential
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Self-Assisted CGEE (Client Generated Extended Ephemeris)
• Without the necessity of data download from serversince it captures ephemeris data from satellites locallyand predicts ephemeris within the next 3 days.
Self-Assisted CGEE (2)
• An external EEPROM is used for datastorage.
• CGEE function is enabled automaticallywithout any command input.
• Achieve Warm Start faster with shorterTTFF while in weak GPS visibility conditionslike urban environment.
Quectel
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receiver performance (1)
Benefiting from high-speed location engine and strict design:
• High sensitivity navigation engine
• 48 track verification channels
• Integrated LNA
• SAW filter design
L30 achieves:
• Enhanced receiver sensitivity and navigation performance
• Greater coverage
• Reduced time to fix
• Improved positional accuracy
Quectel
Confidential
www.quectel.com
Performance L30
TTFF, autonomous, @-130dBm
Cold Start <35s
Warm Start <35s
Hot Start <1s
TTFF with CGEE, @-130dBm
Cold Start 25s,typ.
Warm Start 10s,typ.
Hot Start <1s
Sensitivity
Cold Start -145dBm
Tracking -160dBm
Reacquisition -159dBm
Sensitivity with external LNA
Cold Start -148dBm
Tracking -163dBm
Reacquisition -160dBm
receiver performance (2)
Time To First Fix
Sensitivity
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Static Accuracy Horizontal Position Accuracy, The radius of circle centered at the true position ,
containing the position estimate with probability of 95%.
L30 uB** NEX-6
R95 0.966 1.045
receiver performance (3)
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Tracking comparison
receiver performance (4)
When driving to enter the tunnel, Quectel module L30 still can
track and trace for about 15s, but uCompany NEX-6 can not.
Quectel
Confidential
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Tracking comparison
receiver performance (5)
Quectel module L30 can position accurately and provide real information
about the road , but uCompany NEX-6 can not position as accurately as
L30 and deviated from the road, when driving under overhead road.
Quectel
Confidential
www.quectel.com
Low-power design (1)
Based on rigorous hardware design and adaptive micro-power
controller, L30 features the lowest current consumption in
acquiring, tracking and hibernate states.
The following data is measured in the condition of open sky @ -130dBm.
State Typical value
Acquisition 40mA
Tracking 36mA
Hibernate 17uA
Quectel
Confidential
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Various power saving modes are offered to meet demanding applications that
have different requirements in position report interval and power consumption.
Low-power design (2)
Adaptive Trickle Power (ATP) mode
• Cycles three states internally to optimize power consumption and provides a constant output rate.
• Adaptively returns to full power so that message output rates remain constant even in difficult environments.
• Give performance very similar to full power, but with significant power savings in strong-signal conditions. Typically, 10mW for 1Hz output rate.
Power
consumption
100-
900ms
Configurable
1-10 s
Full
power
state
(tracking)CPU only
stateStandby state
Quectel
Confidential
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Push To Fix (PTF) mode
• Wakes up periodically, typically every 1800 sec (configurable range 10 ~ 7200 sec) for updating position and collecting new ephemeris data from valid satellites.
• Stays in hibernate mode in the rest of the time.• Supply a position within the Hot Start time specification, designed for the application
that requires infrequent position reporting.• Only 50 ~ 500μA maintains Hot Start capability.
Low-power design (3)
Power
consumption Configurable
10-7200 s
Full power
state
(tracking)
hibernate state
Quectel
Confidential
www.quectel.com
Contents
General description
- Highlights- Hardware Architecture- Software Technology- Mechanical Dimension- Target Applications
High Sensitivity GPS Engine
- Advantages of Engine- ROM Introduction
Features
- Self-Assisted CGEE- Receiver Performance- Low-power Design
Support Package
Quectel
Confidential
www.quectel.com
Support Package(1)
Evaluating board
Interfaces• GPS serial port• Antenna interface• Adapter interface• Test points• Power switch
Accessories
• GPS active antenna• Serial port cable (USB 2.0 converter)• DC 5V/2A power adapter
Quectel
Confidential
www.quectel.com
Documents• Hardware design guide• GPS protocol manual• Part&Decal in PADS and Protel format• AGPS (CGEE) application notes• Evaluating board user guide
PC tool• SiRFLive tool
Support Package(2)
Quectel
Confidential
