Next Steps Proposed Testbeds Panel Discussion. John Chapin Chair, SDR Forum SDRF Workshop on Spectrum Access by TV Band Devices Dearborn, Michigan June 16, 2009. Proposed Testbeds. Test & Measurement Issues Slides provided by Bob Cutler, SDRF Test & Measurement Group
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John ChapinChair, SDR Forum
SDRF Workshop on Spectrum Access by TV Band Devices
June 16, 2009
Higher Potential For Interference
Lower Spectrum UtilizationLower Capacity
Lower Link Reliability
Lower Potential for Interference
Higher Spectrum Utilization
Higher Link Reliability
Position affected by:
Environment Sensing Performance
Regulations, and Specifications
Need To Measure:
In order to:
Need to answer these questions:
What should be measured?
How do you measure it?
What should the specifications be?
Does the radio meet the specifications?
Visible effects on DTV receiver picture display
co-channel, adjacent, +/- N channel
Ability to sense wireless microphones
standalone, +/- N channels from strong DTV signal
Sensing of primary signals when other TVBDs are present
Other TVBDs are co-channel, adjacent channel
Channel is congested
compliance with database control commands
interact as required (time delay, location change)
Efficient channel sharing among multiple TVBDs
Interference distance vs detection distance
Channels shared between personal/portable and fixed TVBDs
The Dutch Antilles intend to become a leader in Cognitive Radio.
To achieve this goal a collaborative effort under leadership of the Delft University of Technology has been initiated.
Goal: develop an heterogeneous auction-based DSA (Dynamic Spectrum Access) system. Initially in the UHF TV band.
https://mentor.ieee.org/1900.6/dcn/09/6-09-0033-01-0000-doi-in-the-netherlands-antilles-on-tvws.ppt (more recent)
Curaçao is the largest of the three so called ABC islands (for Aruba, Bonaire, and Curaçao) of the Leeward Antilles. It has a land area of 444 square kilometers (171 square miles). As of 1 January 2008, it had a population of 140,796. Almost 600,000 people visit Curaçao annually, mostly from Western Europe and the Americas.
The whole island is available for the testbed.
The Ministry of Transport intends to provide facilities to support cognitive radio tests. Those facilities can be used to simulate the RF environment of different regions of the world.
Furthermore the Antillean government intends to “group test” common challenges that are being faced in developing (TVBD) applications for next generation networks.
It will allow use of equipment by the local population if this helps Cognitive initiatives to gather valuable data and reach their point of maturity earlier.
At the moment additional support from the technical faculty of the University of the Dutch Antilles is being discussed.
We ask for input from the industry to help define the required facilities.
Large indoor spaces with grounded metal walls
Regular commercial and residence type structures
“Urban style” outdoor pathshigh multipath & shadowing
Both open land and heavy foliage areavailable on the property