simulink ofdm
I personally believe that the webinars do NOT give the best idea on using Simulink. I pointed this out to people from the Mathworks. They said that newer versions of Matlab will have better documentation for the Communication blockset (If you want to know how good or bad you are, try building a simple communication system with a CRC, Convolutional encoder, Interleaver, DPSK modulation, Rayleigh channel and a receiver for these, if you dont get any error you're good enough to start a project. If you have errors or problems, work on removing them)
Meanwhile webinars do give a better understanding than just sitting vacantly, but really thats it.