In a press release that is barely comprehensible (or, quite possible, totally incomprehensible) to one such as I, GE has announced a new generation of components that can be used for, among other things, software-defined radios. It is unclear to me whether this technology is designed for anything except military use, but …
Software-defined radios (SDRs) are not the next generation of transistor radios or boomboxes (ask your parents, kids). They are radios in the more primordial sense of being devices that can receive radio-wave signals. The radios you and I are used to are hard-wired to do one thing: Tune into specific frequencies and translate the radio signals into toe-tapping tunes or the blather of infuriating talk show hosts. SDRs can be programmed to do anything they want with any type of signal they can receive. For example, they might treat messages as, say, maps, or signals to turn on the porch light … or as Internet packets.
SDRs matter a lot if only because they promise an alternative to the current broadcast medium. The way it works now, the FCC divvies up spectrum (i.e., frequencies) for particular uses and sells much of it to particular broadcasters. So, your hard-wired radio responds to particular frequencies as carriers of acoustic information sent by known, assigned providers: 106.7 on your radio dial, or whatever. This is a highly inefficient use of spectrum, like dedicating particular lanes of a multi-lane highway to a specific trucking companies. It’d be far more efficient if transmitters and receivers could intelligently negotiate, in real time, which frequencies they’re communicating on, switching to frequencies that are under-trafficked when a particular “lane” is jammed. If our radio receivers â€” not just our in-dash radios, but all devices that receive radio wave transmissions â€” were smart devices (SDRs), we could minimize the amount of spectrum we assign to a handful of highly-capitalized broadcasters. We would have more bandwidth than we could eat.
So, I think it’s good news that GE is pushing ahead with this and is commercializing it … unless I’m misunderstanding their announcement, the technology’s uses, and GE’s intentions to commercialize it.