The accuracy of Unicore GNSS receivers ranges all the way from meter, though sub-meter and centimeter, down to the millimeter level.

Using our own unique technology Unicore has successfully developed and fielded series of multi-system, multi-frequency, high-performance System on a Chip (SoC), and a range of high-precision, board-level GNSS receivers and navigation/timing modules.

Applications include Continuously Operating Reference System (CORS) reference stations, survey & mapping, precision agriculture, positioning & heading, vehicle monitoring, autonomous vehicle navigation, and precision timing – along with a number of other

Unicore is a one-stop provider of GNSS SoC chips and GNSS receivers, with extensive experience in the design, verification, development, implementation and production of highly integrated ICs, along with multi-system high-performance GNSS baseband algorit

Unicore Communications, Inc. is a technology company focused on the design & development of highly integrated ICs, algorithms and GNSS receivers.

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UB4B0

GNSS High Precision Board GNSS High Precision Board

Brief Introduction

UB4B0 is the first system-wide GNSS high-precision board based on new-generation Nebulas-II high-performance SoC chips developed by Unicore Communications, supporting multiple satellite navigation systems and triple-frequency RTK technology including BDS, GPS, GLONASS, Galileo and QZSS, mainly facing to applications of high-precision positioning, navigation and mapping, etc.
■ Multi-systemmulti-frequencysignalprocessing
UB4B0 can simultaneously track signals of BDS, GPS, GLONASS, GALIELO and QZSS satellite navigation systems, supporting triple-frequency signals of BDS, GPS and GALILEO. Due to more signals of satellite navigation systems and reliable triple-frequency RTK technology, UB4B0can realize “immediate” RTK initialization, and achieve 1-2cm positioning accuracy. In scenarios of under tree and long distance, etc.,UB4B0can still acquire reliable RTK positioning result.
■ Self-adaptiveanti-interference
UB4B0 integrates onboard MEMS chips and improved U-Fusion integrated navigation algorithm. In some complex environment of buildings, tunnels, viaducts and woods, etc., such technology can effectively resolve issues of interrupted positioning results brought by satellite signal obstruction, which can provide continuous, high-quality and high-output ratio positioning results. In addition, UB4B0 also supports odometer input and external high-precision IMU interface, which can provide better integrated navigation positioning performance.
■ OnboardMEMSintegratednavigation
UB4B0 integrates onboard MEMS chips and improved U-Fusion integrated navigation algorithm. In some complex environment of buildings, tunnels, viaducts and woods, etc., such technology can effectively resolve issues of interrupted positioning results brought by satellite signal obstruction, which can provide continuous, high-quality and high-output ratio positioning results. In addition, UB4B0 also supports odometer input and external high-precision IMU interface, which can provide better integrated navigation positioning performance.
■ Abundantdeviceinterfaces
UB4B0 provides abundant device interfaces, including serial ports, USB interface, and Ethernet interface. UB4B0 onboard ports can support high-speed output of big amount of data and multiple data streams, as well as supports WEB interface; USB interface can support high-speed data transmission and external USB storage device. In addition, UB4B0 is also equipped with interfaces of 1PPS, external clock, CAN and odometer, which can satisfy the needs of multiple applications on interfaces.

Application Field

• Brand-newNebulas-IIhigh-performanceSoCchips
• Independentpositioningofanyrandomsystemand combinedpositioningofmultiplesystems
• Supportsadvancedmulti-pathresistancetechnology andlow-elevationtrackingtechnology
• Centimeter-levelhighprecisionRTKpositioning
• Orientationprecisionsuperiorto0.2degree
• Supportstraditionalaccessincludingserialports, internetaccess,1PPS,externalclockinput,etc.
• SupportsCANandodometerinputinter    face

Product Characteristics

• 432superchannelsandspecificfastacquisitionengines
• SupportsBDS,GPS,GLONASS,GalileoandQZSS
• IndependenttrackingofBDSfrequencypointsignals
• Self-adaptiveanti-narrowbandinterferencecanreach60dB
• OnboardMEMSintegratednavigation
• SupportsspecialtyapplicationsofBSDprecisecodes
• Hardwarecompatiblewiththeinterfaceandsizeofthe mainstreamboard

Data Manual

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Technical Index

Performance Specifications

Channel

432 channels, bases on Nebulas-II chip

Cold Start

<45s

Signal

BDS B1/B2 /B3

GPS L1/L2/L5

GLONASS L1/L2

GALILEO E1/E5a/E5b

QZSS L1/L5

SBAS L1

Hot Start

<10s

Recapture

<1s

Initiation Time

<10s(Typical)

Initiation Reliability

Larger than 99.9%

Differential Data

RTCM 2.X/3.X CMR

Data Format

NMEA-0183,Unicore

Single Point Positioning (RMS)

Plane:1.5m

Data Updating Rate

20Hz

Elevation:3.0m

Positioning Updating Rate

20ns

RTK(RMS)

Plane:10mm+1ppm

TimeAccuracy(RMS)

0.03m/s

Elevation:15mm+1ppm

NetworkProtocol

0.03m/s



Network Protocol

NTRIP、HTTP、FTP

Operating Conditions

Parameter

Symbol

Min.

Typical

Max.

Unit

Power Supply (VCC)

Vcc

3.0

3.3

3.6

V

Peak Current

Iccp



8.8

A

Voltage Input Low

Vin_low_1

-0.3


VCCx 0.3

V

Voltage Input High

Vin_high_1

VCC x 0.7


VCC+ 0.3

V

Voltage Output Low

Vout_low

0


0.45

V

Voltage Output High

Vout_high

VCC-0.45


VCC

V

Noise Figure

Nftot

2.5

3.3

3.5

dB

LNA(Master Antenna)

ANT1_PWR

3.0

5

5.5

V

LNA(Slave Antenna)

ANT2_PWR

3.0

5

5.5

V

PhysicalSpecifications

Size

30×40×4 mm

Weight

8g

Temperature

Working: -40℃~+85℃

Storage: -55℃~+95℃

Humidity

95% No condensation

Vibration

GJB150.16-2009,MIL-STD-810

Shock

GJB150.18-2009,MIL-STD-810

Functional Ports

3x UART, 1xI2C, 1x SPI (LV-TTL)

1x1PPS(LV-TTL)

1xEvent input

Application Area