Monitoring and Enforcing the
Orbital Spectrum
Jan Verduijn
Chairman ITU SG1 WP 1C on Monitoring
Jan.verduijn@srcon.nl /
jan.verduijn@ties.itu.int
Content
• Spectrum management and the role of
monitoring
• Spectrum management cycle
• Types of monitoring
– Terrestrial monitoring
– Space monitoring
• Observing the orbital spectrum
• Enforcement
• Conclusions
05/06/2008
19th EMC Symposium, Wroclaw,
2008
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Spectrum management and the role of
monitoring
Definition of Spectrum Management:
Spectrum management is the combination
of administrative, scientific and technical
procedures necessary to ensure the efficient
operation of radiocommunication equipment
and services without causing harmful
interference.
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2008
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Spectrum Management
• Main functions in Spectrum Management:
– Frequency allocation and assignment
– Licensing
– Enforcement
• Impact of telecommunication on today's
economics, theoretical planning is not enough
anymore.
• Knowledge on the actual use of the spectrum is
needed
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2008
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Role of Monitoring in the overall Spectrum
Management process
Monitoring can be defined as a process of:
• observing the radio frequency spectrum
and
• reporting on the use of it.
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2008
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Spectrum Management cycle
M O N IT O R IN G
E nforcem ent
Spectrum
m anagem ent
functional elem ents
R A D IO SP E C T R U M
M O N IT O R IN G
Feed back
M O N IT O R IN G
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Feed forw ard
6
Typical monitoring configuration for terrestrial monitoring
RIYADH as RFMS and MCC
Buraydah
(ARFMS)
RDFS1
Manageme
FSSMS
Monitorin
Headquarters
Riyad
RDFS-1
RDFS-1
RFM
2 x MMS1 (VHF/UHF)
1 x MMS2 (SHF)
RDFS-2
TRMS
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Growing importance of space monitoring (1)
• Monitoring based on same principle as for
terrestrial monitoring;
• Resolution ITU-R 23;
• Space – and terrestrial services sharing
same frequency bands;
– Increasing possibilities of interference
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19th EMC Symposium, Wroclaw,
2008
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Growing importance of space monitoring (2)
• Within CEPT: 6 countries established via
a MoU their space monitoring via Leeheim
• Annual meeting of experts in space
monitoring: this year in Washington, USA
• Within ITU-R:
– Recommendation ITU-R SM.1681
– Question ITU-R 232/1
– Review Chapter 5.1 of HB Spectrum
Monitoring
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2008
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Tasks of a space monitoring station
• detecting and identifying space station emissions;
• determination of occupancy of space station
transmitters;
• measurement and recording of the characteristics of
space station emissions
• investigation and elimination of harmful interference;
• measurements and recordings for technical and scientific
projects;
• detection of illicit use of transponders and identification
of its source(s);
• pre-launch monitoring
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19th EMC Symposium, Wroclaw,
2008
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Visible geostationary arc: 67° W to 83° E
MBA
Antenna
1
Antenna
2
Antenna
3
1 - 26,5
GHz
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3,2 - 4,2
GHz
130 MHz 1 GHz
19th EMC Symposium, Wroclaw,
2008
1,5 -2,3 GHz
4,3 - 8,5 GHz
10,7-12,75 12
GHz
Slide 12
spectra for…
... Measurement of
frequency,
bandwidth,
power level
Calculation of
p.f.d. and EIRP
Judgement on
class of emission,
type of modulation
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Slide 13
Example: Spectrum of a satellite
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Slide 14
Wide band measurements below noise level
5 dB / div
Span: 20 MHz
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Slide 15
neighbouring
satellite
Transmitter
Location
System
interfered
satellite
Mobile Reference
Transmitter
interfering
transmitter
location unknown
Space Radio
Monitoring Station
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2008
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Slide 16
Conclusions
• Due to the growing importance of space
monitoring:
– Need for global coverage via visible arc;
• Need for more space monitoring earth stations
– Cooperation via Space monitoring Workshop;
– Discussion with ITU Space Service
Department on data collection of space
monitoring
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2008
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Questions???
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