"Radio Heads" is a group created to explore different aspects of software defined radio. Topics to be addressed include both the reception and transmission of RF signals, the processing of data captured from the ether, cell phone networks, and ham radio. This is a group, not a class. There is no instructor. Just a handful of similarly minded people trying to learn something at roughly the same time. If you have a pet project you think might apply to this group feel free to propose it.