Last modified 5 years ago
You are here: Manual / Algorithms / Interfering Signals
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Table of Contents
- About this Wiki
- About the STG (SEAMCAT Technical Group)
- About the source code
- Frequently Asked Questions
- How to register on TracTool?
- Tutorial videos
- Known Issues
- Disclaimer
Introduction
Main structural elements of SEAMCAT
Data elements
- SEAMCAT Data types
- Function entry
- Emissions mask
- Random distributions
- Antenna
- Signal vectors
- How to generate a truncated distribution?
Simulation workspace
Creating SEAMCAT scenario
- Simulation scenario and its programming
- Victim link tab
- Interfering link tab
- Sharing and importing scenarios
Performing a simulation
- Simulation control settings
- Running a simulation (event generation)
- Calculating probability of interference
- Simulation results overview
- Generic system results
- Simulation report
- Logging options and remote server
- Saving results format
CDMA module
- CDMA system tab
- CDMA Link level data
- CDMA simulation algorithm
- CDMA input parameters
- CDMA output results
OFDMA module
Cognitive Radio System module
Library of scenario elements
- Library overview
- Antenna elements
- Spectrum emission mask elements
- Receiver blocking mask elements
- Receiver elements
- Transmitter elements
- CDMA Link level data
- CDMA-OFDMA network
- 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
- Batch simulations
- Multiple vectors comparison
- Setting plugins environment
- Multiple Interferers generation
- Remote computing
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
Annexes
Release to be tested by STG
Calculation of interfering signals iRSS_{blocking} and iRSS_{unwanted}
The calculation of the interfering signal strength (iRSS) values for each event for unwanted interference (iRSS_{unwanted}) and for blocking interference (iRSS_{blocking}) is as follow. The calculation is repeated for each defined interfering link:
- Trial of random parameters of the Interfering Link Transmitter (ILT):
- power supplied:
- frequency:
- antenna height:
- Trial of random parameters of the Interfering Link Receiver (ILR) (only useful if power control is activated):
- antenna height :
- Calculation of relative location for the given ILT and ILR pair
- Calculation of azimuth and elevations angles for the given ILT-ILR path
- Calculation of antenna gains for the given ILT-ILR path
- If Power Control option was selected in the ILT scenario settings:
- Calculation of propagation path loss for ILT-ILR path
- Calculation of power control gain for the given IT-WR path
- Calculation of relative location of the given ILT with regards to VLR
- Calculation of azimuth and elevations angles for the given ILT-VLR path
- Calculation of antenna gains for ILT and VLR antennas on the ILT-VLR path ( and )
- Calculation of propagation path loss for the given ILT-VLR path ();
- Calculation of VR blocking attenuation for blocking interference type:
- Calculation of total IT (unwanted) emissions level falling into VR bandwidth:
- Calculation of iRSS_{unwanted}:
- Calculation of iRSS_{blocking}:
Attachments
- Pit-sign.PNG (342 bytes) - added by cp 9 years ago.
- gpcit.gif (1.7 KB) - added by cp 9 years ago.
- avr.gif (3.1 KB) - added by cp 9 years ago.
- emission-formula.PNG (9.6 KB) - added by cp 9 years ago.
- IRSSblocking-formula.PNG (29.3 KB) - added by cp 9 years ago.
- IRSSunwanted-formula.PNG (31.7 KB) - added by cp 9 years ago.
- ILR_height.gif (1.8 KB) - added by jean-philippe 5 years ago.
- ILT_emission.gif (2.4 KB) - added by jean-philippe 5 years ago.
- ILT_frequency.gif (1.8 KB) - added by jean-philippe 5 years ago.
- ILT_gain.gif (1.9 KB) - added by jean-philippe 5 years ago.
- ILT_height.gif (1.8 KB) - added by jean-philippe 5 years ago.
- ILT_power.gif (2.0 KB) - added by jean-philippe 5 years ago.
- ILT_power_control.gif (1.8 KB) - added by jean-philippe 5 years ago.
- VLR_attenuation.gif (2.2 KB) - added by jean-philippe 5 years ago.
- VLR_ILT_gain.gif (1.9 KB) - added by jean-philippe 5 years ago.
- irss_blo_eq.gif (4.0 KB) - added by jean-philippe 5 years ago.
- irss_unw_eq.gif (4.0 KB) - added by jean-philippe 5 years ago.
- VLR_ILT_pathloss.gif (2.0 KB) - added by jean-philippe 5 years ago.