In a real sense, radios are limited like humans: it’s hard to both talk and listen at the same time. A radio receiver picks up nearby emitted signals, so it cannot broadcast at the same time it’s trying to listen. While this has worked well enough for over a century of radio use, if any device using radio signals could receive and transmit at the same time, it could effectively fold space into the existing spectrum and speed up communications. Kumu Networks says they have a solution to this problem, a new “self-interference cancellation technology.” If it works at scale, the implications could be use for military customers narrowly, and for anyone that uses radio or Wi-Fi more broadly.
“At the very basic concept, if you think about noise canceling headphones you are wearing on the airplane, how do they work? They listen to the environment, they record the environment, they inverse the noise of the environment by 180 degrees and they inject it back in your ear so you think that you don’t hear anything,” says Joel Brand, vice president of product management for Kumu Networks. “That’s what we do: we take a copy of the translated signal, we invert it, and we inject it into the receiver of that same radio, so the radio doesn’t think that it hears itself. If it cannot hear itself, it can hear everything else.”
While it will be some time before this technology is fielded in smaller, battery-powered devices (think phones), Brand says its already out in the world in large commercial deployments with two major U.S. carriers. The immediate frontier is expanding beyond infrastructure nodes to plugged-in radio signal hubs in houses, like Wi-Fi hotspots or Internet of Things hubs. Brand wouldn’t name the carriers, but he described the process of the existing installations. READ MORE...
With over 13,000 members internationally, the Association of Old Crows is an organization for individuals who have common interests in Electronic Warfare (EW), Electromagnetic Spectrum Management Operations, Cyber Electromagnetic Activities (CEMA), Information Operations (IO), and other information related capabilities. The Association of Old Crows provides a means of connecting members and organizations nationally and internationally across government, defense, industry, and academia to promote the exchange of ideas and information, and provides a platform to recognize advances and contributions in these fields.