Making a multi-band amateur radio transceiver has always been a somewhat challenging project, and making one that also supported different modes would for many years have been of almost impossible ...

It’s fair to say that software-defined radio represents the most significant advance in affordable radio equipment that we have seen over the last decade or so. Moving signal processing from ...

Imagine handsets that can work on any network, in any country, and on any frequency with the prevailing protocol and with seamless handoffs. Such devices do exist, but they aren’t cheap. The ...