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Introduction
Main structural elements of SEAMCAT
Data elements
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- Function entry
- Emissions mask
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- Antenna
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- How to generate a truncated distribution?
Simulation workspace
Creating SEAMCAT scenario
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Performing a simulation
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CDMA module
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OFDMA module
Cognitive Radio System module
Library of scenario elements
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- Receiver elements
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- Propagation model plugins
- Post processing plugins
Propagation models
- Guide to propagation models in SEAMCAT
- How to test propagation model?
- ITU-R P.1546 model
- Extended Hata and Hata-SRD models
- Spherical diffraction model
- Free Space Loss model
- User-defined model (Propagation plug-in)
- JTG5-6 propagation plug-in
- SE42 propagation plug-in
- Longley Rice propagation plug-in
- Winner propagation plug-in
- IEEE 802.11 Model C (modified) plug-in
Special functions
Detailed algorithms/Calculations
- Wanted signal (dRSS)
- Unwanted and blocking signals (iRSS)
- Overloading (iRSS)
- Intermodulation signal (iRSS)
- CDMA simulation algorithm
- OFDMA simulation algorithm
- Location of VLR with ILT (Simulation Radius)
- Location of VLR and ILR (Coverage radius)
- Azimuths and elevations (IT-VR path)
- Azimuths and elevations (within a link)
- Blocking attenuation (VLR)
- unwanted emissions (ILT)
- Power control gain (ILT)
Annexes
Release to be tested by STG
Extended Hata and Hata-SRD models
The Hata model (also referred to as Okumura-Hata) was originally developed for non-Line-Of-Sight (Non-LOS) paths in urban environments typical of mobile services - that is with low-height mobile terminals moving in cluttered environment.
The Hata-SRD variation was developed in CEPT within the Project Team SE24 for studies of Short Range Devices (SRD). The basis for modification was an assumption that although SRD devices are usually operated at low antenna heights (typically person-carried devices, i.e. with antenna height of ca. 1.5 m), but the interference would usually occur at relatively short distances (up to 100 m or so) when direct-Line-Of-Sight(LOS) or near-direct-LOS might be assumed.
Therefore the Hata-SRD model includes adjusted expression of a certain parameter b(Hb), which in standard Hata model would introduce significant extra path loss when transmitter antenna height is much less than 30 m. It was found that this extra loss is not justified in the considered SRD scenarios of short range & direct-LOS communication/coupling.
See the separate page for recommendations regarding selection of most appropriate model for your studies.
For detailed description of Extended-Hata and Hata-SRD models implemented in SEAMCAT see the attached PDF file (156 KB).
Attachments
-
Hata-and-Hata-SRD-implementation.pdf
(156.1 KB) -
added by cp 5 years ago.
-
Hata-and-Hata-SRD-implementation_v1.pdf
(253.0 KB) -
added by jean-philippe 3 years ago.
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Hata-and-Hata-SRD-implementation_v2.pdf
(171.8 KB) -
added by jean-philippe 2 years ago.
