Technical Exchange
Silicon DSP Corporation just announced the availability of free Youtube Videos for OFDM/OFDMA and MIMO OFDM. Click on the links below.
OFDM/OFDMA Video Tutorial Series:
MIMO OFDM Video Tutorial Series:
For details on the OFDM/OFDMA Tutorials click here.
For details on the MIMO OFDM Tutorial click here.
A Mathematica® Notebook for 3D Ray Tracing for Radio Waves in the IONOSPHERE has been developed based on the FORTRAN Code by:
R. Michael Jones, Judith J. Stephenson, A Versatile Three-Dimensional Ray Tracing Compute Program for Radio Waves in the Ionosphere, OT Report 75-75, US Department of Commerce, October 1975
The Open Source Mathematica® Notebook and various tools are available at the RadioCalc.COM site. The FORTRAN Code based on the published code in Jones and Stephenson is also available here. It took an extensive effort to Scan, OCR, debug and port the CDC Mainframe FORTRAN to GNU gfortran. Below is a plot of computed ray traces at different elevation angles propagating through the Ionosphere (Plotted using Capsim V7 QT Based on MACOS X and Java IIPPLOT).
The Mathematica® Notebook is Open Source GPL V3. Using Mathematica® enables Research and Development in Radio Wave Propagation at a whole new level.
We have created a Projects page to list multiple significant existing and future projects.
The projects include:
1- Synthetic Aperture Radar
2- Charge Pump PLL
3- Viterbi Decoding
4- Reed Solomon Error Correction
5-Neural Networks
6- Physical and Link Level Simulation in Capsim
7- Timing Recovery and Digital Communication Link Simulation with Adaptive Equalization
8-Blind Equalization of Mobile Fading Channels
These are comprehensive projects that may also include, in the majority of cases, Capsim C Blocks and Topologies as well as Subroutines. Most projects include technical papers and references.
We will add new projects when completed and announce them on this Blog.
Downloads available for 64 bit CapsimTMK on MACOSX and Linux. Visit CapsimTMK.
The 64 Bit CapsimTMK (V6.1) Hierarchical C Based Block Diagram Simulation and Modeling Tool for DSP and Communications has been developed for the 64 Bit MSYS2(MINGW) Environment for running on the Windows 7 and 10 64 Bit Platforms. In addition, a wide range of applications in DSP, Communications, Speech Processing and Image Processing have been added as well as new blocks for Audio File (AIFF) and Image (TIFF) input and output.
To download 64 Bit CapsimTMK for MSYS2(MINGW) on Windows (7 and 10) go to the CapsimTMK Site as well as the page setup for MSYS2 Development.
A large number of Screen Shots are provided in the links above.
In addition to the availability of CapsimTMK (V6.1) on Windows 7 and 10, we have also developed and provide Java tools for plotting results, with emphasis on plots for DSP and Communications (IIPPlot). A key Java tool that we provide, automatically draws a block diagram of a topology from the text(ASCII) file description. Another Java tool assists in building C code Blocks for incorporation into Capsim.
Here is a screen shot for a digital communication links showing the Java Tools in action.
Also the IIR Digital Filter in Action:
Many more screen shots are available on the site.
Finally the latest 64 bit CapsimTMK (V6.1) has been ported and is fully operational on the MACOSX and Linux platforms. We will update the availability of the downloads on this blog.
We are in the process of developing a Java based Capsim Topology Drawing Application. We call it DrawTopology. With this tool, you can Graphically Visualize the Block Diagram. The tool will automatically create a graphical block diagram from a Capsim® text topology file. As you edit the text file adding blocks and connections in Capsm®TMK, you can save it and see your changes graphically in a Java Scrollable Window ( Automatically Generated from Text Topology File).
While we will not support graphical editing of the block diagram with this tool at this time (see Capsim® QT) it is a super efficiency enhancement tool working with Capsim®TMK.
Stay tuned.
Every once in a while I get a link to a white paper. In this case it was from Rhode & Schwartz and the topic is : “Fundamentals of RF Design”. This is a great paper. Highly recommended. It came through Microwave and RF. So here is the link:
Check it out.