Bluetooth claims to own the low-power wireless space with its Low Energy (LE) flavor. A newer, yet older entrant in the space wants to claim that throne. That would be Low Energy UWB, or LE-UWB. And now you understand the reference to newer-older. 

SPARK Microsystems, a Canadian fabless semiconductor company specializing in next-generation ultra-wideband (UWB), and UWB Alliance, an international non-profit organization dedicated to the promotion and growth of the UWB industry, have initiated a joint effort to test the coexistence and aggregation capabilities of UWB technology in environments where other UWB or other wireless protocols and radio devices are in use.

With 10x faster data throughput, 60x less latency, and 40x better energy efficiency, UWB prompts a fresh look at design considerations from payload sizing to testing/certification and antenna design.