The use of wireless devices is exploding. Statista, an international research service, estimated in March 2019 that roughly 13 billion mobile devices (e.g., phones, tablets, laptops) were in use worldwide, and Gartner, a global research and advisory firm, predicts that the internet of things will swell that number to more than 21 billion devices by the end of 2020.
The widespread use of mobile devices already creates significant demand on the cellular system that supports all this wireless connectivity, especially at locations, such as an outdoor concert or a sports arena, where large numbers of users may be simultaneously connecting. The ability of current-era cellular technology, or even the proposed next-generation 5G technology, will be severely strained to provide the high data rates and wide-area communication range needed to support the escalating device usage.
The communications community has been looking at in-band full-duplex (IBFD) technology to increase the capacity...
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