![]() These proposals – which would vastly increase wireless data capacity – were met with fierce resistance, from incumbent licensors, from spectrum speculators, and from HAMs, who are brilliant but also tend to be conservative about spectrum allocation. ![]() Two radios that needed to talk to one another might make contact in one band, switch to another, or ask a third receiver to relay messages for them, using just enough power to reach one another, avoiding the bands that were already in use. This was dubbed "cognitive radio" and its proponents imagined a world where the exclusive spectrum allocations handed out to telcos, broadcasters and other powerful entities would be replaced by a cooperative spectrum model. Today, a radio can be a commodity computer that can sense other devices' RF use and transmit and receive on multiple frequencies to share the airwaves. ![]() Our current spectrum management assumes that senders and receivers have characteristics that are fixed at the point of manufacture, determined by things like the shape of an antenna and the type of quartz crystal used as an oscillator.īut software-defined radios (SDRs) and software-tunable phased-array antennas make those assumptions obsolete. In the early 2000s, dramatic shifts in radio spectrum allocation for mobile data applications, combined with advances in radio transmission and receiving prompted some networking engineers to propose a radical rethink of radio. ![]() Mexican indigenous telco wins spectrum fight ( ) Colophon: Recent publications, upcoming/recent appearances, current writing projects, current reading.Knowledge is why you build your own apps: Outsourcing software development squanders vital understanding.Understanding /r/wallstreetbets: More than a bull run, a symbiosis of a market maker and market destroyers.How apps steal your location: A deep dive into the murky depths of surveillance markets.Mexican indigenous telco wins spectrum fight: First Nations treaties do not sign away electromagnetic franchises.
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