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SEAMCAT Manual 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 dialog window
- Emissions mask dialog window
- Random distribution dialog window
- Antenna pattern dialog window
- Signal display window
- How to generate a truncated distribution?
Simulation workspace
Creating SEAMCAT scenario
- Simulation scenario and its programming
- Victim link dialog window
- Interfering link dialog window
- CDMA system dialog window
- Sharing and importing scenarios
CDMA module
- CDMA Module Overview
- CDMA Simulation Engine (CDMAE)
- CDMA system dialog window
- CDMA Link level data
- CDMA simulation algorithm
- CDMA input parameters
- CDMA output results
OFDMA module
Cognitive Radio System module
Performing a simulation
- Simulation control settings
- Running a simulation (event generation)
- Calculating probability of interference
Simulation results
- Producing simulation report
- Logging options and Remote server
- Saving results in .csv format
Library of scenario elements
- SEAMCAT Library
- Antenna elements
- Receiver elements
- Transmitter elements
- CDMA Link level data
- Propagation model plugins
- Post processing plugins
- Setting up environment for programming plugins
- Exporting and importing a library
Special functions
Detailed algorithms
- Calculation of wanted signal (dRSS)
- Calculation of unwanted and blocking signals (iRSS)
- Calculation of overloading (iRSS)
- Calculation of intermodulation signal (iRSS)
- Interference calculation (non-CDMA/non-OFDMA)
- CDMA simulation algorithm
- OFDMA simulation algorithm
Elementary calculations
- Relative location of VR and IT (Simulation Radius)
- Relative location of transceivers within a link
- Calculation of azimuths and elevations (within a link)
- Calculation of azimuths and elevations (IT-VR path)
- Calculation of antenna gains
- Calculation of VR blocking attenuation
- Calculation of the coverage radius of a transmitter
- Calculation of IT power control gain
- Calculation of IT (unwanted) emissions
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
Reference annexes
- Setting antenna height, pointing azimuth and elevation
- Setting path azimuths in links
- Setting blocking attenuation of victim receiver
- Scenario consistency check
- Error and warning messages
Example Scenarios
Release to be tested by STG
SEAMCAT Memory Allocation
Abstract
The purpose of this page is to explain the why and how memory allocation for SEAMCAT is done. It might be necessary to increase the memory available to SEAMCAT if you are simulating scenarios with a large number of interfering links (10+).
Java Memory Basics
As SEAMCAT is written in java it is running inside an instance of the Java virtual machine. Part of the virtual machine startup procedure is to allocate a FIXED amount of memory. This is done automaticly when you launch SEAMCAT. At the moment the SEAMCAT configuration is allocating 256 megabytes of memory.
How to increase memory available to SEAMCAT
Depending on which version of SEAMCAT you are using the way to increase the available memory is very different. This page only holds information for the windows installer. If you need to run SEAMCAT on a non windows platform with more than the default memory - please contact seamcat@…
Windows Installer Version
When launching SEAMCAT through the .msi installer the memory configuration is stored in a file called SEAMCAT [version].ini (i.e. "SEAMCAT 3.1.44.ini") which is stored in the installation folder. (i.e. c:/Program Files/SEAMCAT/3.1.44). To change the amount of memory available to SEAMCAT you must edit this file and relaunch SEAMCAT. The file will look something like this:
[Java Runtime Environment]
Maximum Version=any
Virtual Machine Parameters=-Xmx256M -Dsun.java2d.noddraw=true
Minimum Version=1.6
Main Class=org.seamcat.Seamcat
[Product Information]
Product Code={B9E54115-E5BE-4683-9A40-A052A8FCC398}
Product Name=SEAMCAT
[Application]
Application Type=gui
Failure Check=yes
Output File=C:\Program Files (x86)\SEAMCAT\3.1.44\output.log
Error File=C:\Program Files (x86)\SEAMCAT\3.1.44\error.log
[Class Path]
Class Path=C:\Program Files (x86)\SEAMCAT\3.1.44\activation.jar;... [removed on the wiki]
You need to change the line that looks like this:
Virtual Machine Parameters=-Xmx256M -Dsun.java2d.noddraw=true
to look something like this
Virtual Machine Parameters=-Xmx1024M -Dsun.java2d.noddraw=true
the configuration above changes the amount of memory available to SEAMCAT from 256 MB to 1GB. Do NOT assign all available memory in your pc to SEAMCAT - Windows does NOT like that.
Please note that any changes to this file only takes affect after restarting SEAMCAT.
