GNURadio provides tools to assist the signal processing. First, the gr modtool eases
the creation of new modules in C++; this section has a step-by-step guide on how to create
new modules on GNURadio. The second part shows the gr filter design, how it works and
which filters can be designed by this tool. The operating system used to perform the tests
and the implementation is Ubunto 12.04.