Radios that can “talk” and “listen” at the same time on the
same or adjacent channels, defying self-interference

Kumu Networks’ solutions empower RF system designers to manage and even eliminate the self-interference produced by local transmitters.

Whether it is to build full-duplex systems, operate multiple radios in the same location on the same or nearby frequencies, improve the performance of traditional filters, or replace fixed filters with tunable filters, our solutions enable you to stay ahead of the technology curve–and ahead of the competition.


Kumu Networks enables radios to “talk” and “listen” on the same channel at the same time. Analog RFICs and digital logic are employed to cancel out the transmit signal and local reflections at the receiver, even in a dynamically changing environment. Self-Interference Cancellation makes it possible to transform a half-duplex radio into a full-duplex radio operating in the same spectrum with twice the throughput. Full-duplex radios are particularly desirable for backhaul links and point-to-multipoint networks.

Mesh networking

Old-fashioned repeaters, modern WiFi extenders, LTE Relay Nodes, and Mobile Ad-hoc Networks (MANETs) are all mesh networks. However, they have little ability to reuse frequencies across consecutive links. That means that either repeater gain must be limited, the signal must be stored-and-forwarded (increasing latency), or multiple frequencies must be used (complicating planning and management). Kumu Networks’ technology enables more robust mesh networks: mobile access frequencies can be reused for backhaul links, cellular repeaters can operate at maximum gain, and WiFi extenders (or other mesh nodes) can use any two channels–even immediately adjacent or overlapping channels.

Radio coexistence / Flexible filters

Self-Interference Cancellation allows radios in the same location to operate on nearby and even adjacent frequencies by eliminating mutual interference. Kumu Networks’ technology cancels out both the main signal that overloads the receiver’s front end and the noise that leaks into the receive channel. The result? More radios can operate in the same space, and long stretches of empty spectrum gaps can be eliminated. With Kumu Networks’ technology, Tri-band WiFi routers with dual 5 GHz radios can use any two available channels–not just channels on opposite ends of the 5 GHz band. Similarly, cable modems can use any combination of channels as defined in the latest DOCSIS standards–enabling cables with longer reach and higher throughput.

Spectrum sharing

Radios that can “talk” and “listen” at the same time make better neighbors. WiFi, LTE-Unlicensed, Bluetooth, Zigbee, Z-Wave, and other technologies all compete in the unlicensed bands. Regulators in some regions of the globe have mandated the use of Listen-Before-Talk protocols to ensure fairness. However, that was only because Listen-While-Talking was unknown. Now thanks to Kumu Networks, individual radios can share spectrum more efficiently, and large diverse networks can intelligently collaborate to optimize spectrum utilization.