RFSim99 is a free linear S-parameter based circuit simulator offering schematic capture, simulation, 1 port and 2 port S-parameter display and file support, tolerance analysis, stability circles, and much more.

The Iterative Solutions Coded Modulation Library is free software you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation either version 2.1 of the License

MATLAB关于4gWImaX的仿真，着力于物理层信号传输距离的模拟，包括了FREE SPACE和TWO Ray模型-WIMAX simulation in signal transmission by using MATLAB, which includes the model of free space and two ray model