For decades, amateur two-way radio operators have communicated across entire continents by choosing the right radio frequency at the right time of day, a luxury made possible by having relatively few users and devices sharing the airwaves. But as cellular radios multiply in both phones and , finding interference-free frequencies is becoming more difficult, so researchers are planning to use to create cognitive radios that instantly adjust their radio frequencies to achieve optimal performance.

As by researchers with Northeastern University’s Institute for the Wireless Internet of Things, the increasing varieties and are creating new challenges for wireless network optimization; a given swath of radio frequencies may be shared by a hundred small radios designed to operate in the same general area, each with individual signaling characteristics

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