Brief on spectrum management issues

Сентябрь 15, 2022

Главная
Алгебра
Brief on spectrum management issues

Содержание

2. CHECKS & BALANCES SPECTRUM MANAGEMENT SYSTEM FCC (Independent Agency) - Business - State & Local -
3. Goal of Civil Interoperability Ideal interoperability provides users a PNT solution using signals from different GNSS
4. L5 1176.45 MHz E5a 1176.45 MHz E5b 1207.14 MHz L2 1227.6 MHz E6 1278.75 MHz L1
5. ICG Providers Forum Definition of Compatibility Compatibility refers to the ability of space-based positioning, navigation, and
6. Radio Frequency Compatibility Ensures that signals do not unacceptably interfere with use of other signals Requires
7. ICG Providers Forum Definition of Interoperability Interoperability refers to the ability of open global and regional
10. On-Line Spectrum Management Resources NTIA Office of Spectrum Management Web Site http://www.ntia.doc.gov NTIA Manual of Regulations
11. BACKUP SLIDES
13. Main Benefit of Interoperability More Satellites ? Better Geometry ? Improves: Satellite coverage ? navigate where
14. Important for Interoperability Common Center Frequency Like L5 & E5a Same Antenna Polarization Common Signal Spectrum
16. Скачать презентацию

Слайд 2

CHECKS & BALANCES SPECTRUM MANAGEMENT SYSTEM
FCC
(Independent Agency)
- Business
- State &

Local
- Entertainment
- Commercial
- Private

Слайд 3

Goal of Civil Interoperability
Ideal interoperability provides users a PNT solution using

signals from different GNSS systems
No additional receiver cost or complexity
No degradation in performance

Interoperable = Better Together Than Separate

Слайд 4

L5
1176.45 MHz
E5a
1176.45 MHz
E5b
1207.14 MHz
L2
1227.6 MHz
E6
1278.75 MHz
L1
1575.42 MHz
L1
1575.42 MHz
1242.9375-
1248.625 MHz
1598.0625-
1605.375 MHz
GLONASS
GALILEO
L5
1176.45 MHz
L2
1227.6

MHz

LEX
1278.75 MHz

L1
1575.42 MHz

QZSS

GNSS Frequency Bands & Signals

Possible future
signal

SBAS

IRNSS

Beidou/Compass & IRNSS
In S-band

Слайд 5

ICG Providers Forum Definition of Compatibility
Compatibility refers to the ability of

space-based positioning, navigation, and timing services to be used separately or together without interfering with each individual service or signal.
Radiofrequency compatibility should involve thorough consideration of detailed technical factors, including effects on receiver noise floor and cross-correlation between interfering and desired signals. The International Telecommunications Union (ITU) provides the framework for discussions on radiofrequency compatibility.
Compatibility should also involve spectral separation between each system’s authorized service signals and other systems’ signals.
Any additional solutions to improve compatibility are encouraged

Слайд 6

Radio Frequency Compatibility
Ensures that signals do not unacceptably interfere with use

of other signals
Requires thorough consideration of detailed technical factors, including
Effects on receiver noise floor
Crosscorrelation between interfering and desired signals
International Telecommunication Union (ITU) provides framework
Details are best worked bilaterally between providers

Слайд 7

ICG Providers Forum Definition of Interoperability
Interoperability refers to the ability of

open global and regional satellite navigation and timing services to be used together to provide better capabilities at the user level than would be achieved by relying solely on one service or signal.
• Ideal interoperability allows navigation with signals from at least four different systems with no additional receiver cost or complexity.
• Common center frequencies are essential to interoperability, and commonality of other signal characteristics is desirable.
• Multiple constellations broadcasting interoperable open signals will result in improved observed geometry, increasing end user accuracy everywhere and improving service availability in environments where satellite visibility is often obscured.
• Geodetic reference frames and system time standards should also be considered.
• Any additional solutions to improve interoperability are encouraged.

Слайд 8

Слайд 9

Слайд 10

On-Line Spectrum Management Resources
NTIA Office of Spectrum Management Web Site
http://www.ntia.doc.gov
NTIA Manual

of Regulations & Procedures for Federal Radio Frequency Management available for download in Adobe Acrobat Portable Document Format (PDF) http://www.ntia.doc.gov/osmhome/redbook/redbook.html
Chapter 4. Allocations, Allotments and Plans
Chapter 5. Spectrum Standards
Chapter 10. Procedures for the Review of Telecommunication Systems for Frequency Availability and Electromagnetic Compatibility (EMC)
ITU Web Site
http://www.itu.int
Overview of the ITU Radio Regulations http://www.itu.int/sns/radreg.html
FCC Web Site
http://www.fcc.gov/
FCC's Table of Frequency Allocations http://www.fcc.gov/oet/spectrum/table/fcctable.pdf

Слайд 11

BACKUP SLIDES

Слайд 12

Слайд 13

Main Benefit of Interoperability
More Satellites ? Better Geometry ? Improves:
Satellite coverage

? navigate where could not before
Dilution of Precision ? accuracy is better everywhere
Eliminates DOP holes (with open sky)‏
RAIM* ? integrity checked everywhere, all the time
Eliminates RAIM holes (with open sky)‏
Phase ambiguity resolution for survey and machine control applications

Geometry

* Receiver Autonomous Integrity Monitoring

Слайд 14

Important for Interoperability
Common Center Frequency
Like L5 & E5a
Same Antenna Polarization
Common Signal

Spectrum
Identical receiver time delay with common spectrum
Same coherent integration period for acquisition
Usually related to symbol rate
Different symbol rates may require separate search correlators for acquiring signals

Essential (cost driver)

Desirable (ASIC gate count)

Important (no time bias or filter issues)

Brief on spectrum management issues

Содержание

CHECKS & BALANCES SPECTRUM MANAGEMENT SYSTEM FCC(Independent Agency) - Business - State &

Goal of Civil InteroperabilityIdeal interoperability provides users a PNT solution using

L51176.45 MHzE5a1176.45 MHzE5b1207.14 MHzL21227.6 MHzE61278.75 MHzL11575.42 MHzL11575.42 MHz1242.9375-1248.625 MHz1598.0625-1605.375 MHzGLONASSGALILEOL51176.45 MHzL21227.6

ICG Providers Forum Definition of CompatibilityCompatibility refers to the ability of

Radio Frequency CompatibilityEnsures that signals do not unacceptably interfere with use

ICG Providers Forum Definition of InteroperabilityInteroperability refers to the ability of

On-Line Spectrum Management ResourcesNTIA Office of Spectrum Management Web Sitehttp://www.ntia.doc.govNTIA Manual