Date post: | 17-Jul-2015 |
Category: |
Engineering |
Upload: | the-european-gnss-agency-gsa |
View: | 244 times |
Download: | 4 times |
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POINT OF VIEW OF A CHIP MANUFACTURER: BROADCOM
GSA Power Hour: GALILEO
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ABOUT BROADCOM BROADCOM AT A GLANCE
Source: Gartner Top 10 Semiconductor Vendors by Revenue, Worldwide, 2013. *Excluding memory companies.
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Fortune 300 GLOBAL leader in semiconductors for wired and wireless communications
One of the
LARGEST VOLUME fabless semiconductor suppliers
Ships ~7M chips a day
One of the industrys broadest IP portfolios with
>20,000 U.S. and foreign patents and applications
One of
TOP 5 semiconductor companies by revenue*
HQ in Irvine, California with
DESIGN CENTERS around the world
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BCM4774 is the new Broadcom Location Hub chip:
o Galileo support, in addition to GPS, GLONASS, QZSS, SBAS and BeiDou
o A-Galileo support Long Term Orbits (LTO) for non-real time connection Assisted GNSS performance (ephemeris and time biases for all constellations)
o On-chip position computation ; no load on the main processor of the device
o Sensor management
Sensor Fusion software runs on-chip and offloads main processor
Direct hardware interfaces to sensors
o Customer-specific software
Downloadable to the BCM4774
BCM4774 can replace the microcontroller in a wearable device
BCM4774 SDK package available
o Automotive qualified version available soon
BCM4774: LOCATION HUB CHIP SUPPORTING GALILEO
Sampling now!
4774
Production Q3 2015
In phones: early 2016
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WHICH DEVICES CAN USE BCM4774?
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BCM4774: INTERCHANGEABILITY ACCOMPLISHED
BCM4774 treats all satellite signals from any constellation equally:
any four satellites will do to compute a fix (even the first fix!)
First Fix with one GPS, one GLONASS, one Galileo, and one BeiDou satellite
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BCM4774: A UNIQUE TRI-BAND FRONT END
A/D
A/D
A/D
1561.098 1575.42 1602
Band S
epara
tion F
ilters
To
Ba
se
band
Pro
ce
ssin
g
Gain Control
and Filters
Gain Control
and Filters
Gain Control
and Filters
Three independent systems, if one system has errors, it is easy to identify and correct
1561.1 1575.4 1598.1 1602 1605.9
BeiDou (China) GPS (USA)
Galileo (Europe) GLONASS (Russia)
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BCM4774: GALILEO PROVIDES MORE ACCURACY
trueposition = ( 37.391198, -121.97038, -8 )
# of tests = 1015, Yield = 100%
The two larger sources of error of satellite positioning are improved by Galileo:
-1.5 -1 -0.5 0 0.5 1 1.50
0.5
1
1.5
Code offset in chips
Mag
nitu
de
GPS L1 C/A
BOC(1,1)
Multipath error
Iono error
IONO Model used Accuracy in meters (67%)
Galileo NeQuick 3.5
GPS Klobuchar 4.2
No IONO model 4.6
8
+
5
L
Indoor
BCM4774 one of the first GNSS chips to support Galileo
BROADCOM: DRIVING INNOVATION IN LOCATION TECHNOLOGY
Outdoor
Indoor Location
Simultaneous Support for Multiple Constellations
Context Awareness Sensors
Always-on Battery Optimal
BCM4774