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GERMAN PARTICIPATION IN HFCHANNEL AVAILABILITY MEASUREMENTSWideband Channel Availability Working Group – 09.09.2014robert.koch@iis.fraunhofer.de

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Agenda

Short overview on…

our funded study

the available German measurement sites

the data acquisition method and software

the planned data analysis metrics

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Overview of the study

Study is funded by German BAAINBw (Federal Office of Bundeswehr Equipment, Information Technology and In-Service Support)

Official contact: Department I 6.1, baainbwi6.1@bundeswehr.org

Title for reference: “Nationale Breitband-Kanalverfügbarkeit”

Main goals:

Analyze appropriate availability metrics

Design and setup measurement hardware and campaign

Give hints for potential future frequency allocation schemes

Time frame: 05/2014 – 10/2014

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Available measurement sites within Germany

Eckernförde, WTD 71(very quiet, costal)

Ilmenau, University/FhG IIS(quiet urban, rural)

Erlangen, FhG IIS(urban)

Nürnberg/Nuremberg, FhG IIS(urban)

Greding, WTD 81(rural)

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Available measurement sites within GermanySite Erlangen, FhG IIS

Hardware: Perseus-SDR, R&S HE011 active antenna (roof top, 3 floors)

Specialty: DRM-Transmitter (15,785 MHz, 100 W avg.) of student radio „Bit-Express“ on tower directly on site (50 m distance)

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Available measurement sites within GermanySite Nürnberg/Nuremberg, FhG IIS

Hardware: Perseus-SDR, R&S HE010 active antenna (roof top, 3 floors)

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Available measurement sites within GermanySite Ilmenau, FhG IIS

Hardware: Perseus-SDR, DX10 active antenna (roof top)

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Available measurement sites within GermanySite Eckernförde/Schwedeneck, WTD 71

Hardware: Perseus-SDR, R&S HE010 active antenna (container, near sea)

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Available measurement sites within GermanySite Greding, WTD 81

Hardware: Perseus-SDR, stationary omni-directional antenna (on field)

Antennas temporarily available (except TX test periods)

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Method used for data acquisition and storage

Designed for compatibility with existing measurement setups within this working group

1 MHz signal bandwidth

4096 FFT for 488 Hz resolution bw.

Averaging for 1 second

Mean and max values stored (float)

Software written in Python for easy extension

Scientific exchange with University of Erlangen/Nuremberg working on channel measurement/modelling

Data acquisition(mostly „Perseus SDR“ receiver with active antennas)

Data collection(Continuos sweep 2-30 MHz in 1 MHz steps every 1 sec)

Data pre-processing(4k FFT, BW 1 MHz, RB 488 Hz, AVG 1 s)

storage

Data post-processing(Windowing to 3-24 kHz channels, time averaging, misc availability metrics)

Report generation

DEU NATO

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Software used for data acquisition and processing

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Planned data analysis metrics

2 Goals

Preparation of results for German frequency allocation requirements

Compatibility and comparability to this working group (resp. NATO)

TBD TBD

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End of presentation

Thanks for your attention!

Contact / questions / remarks to:

robert.koch@iis.fraunhofer.de

ewald.hedrich@iis.fraunhofer.de

or

baainbwi6.1@bundeswehr.org