Low-Power Digital Switching Technique to Eliminate RF Interference

Tech ID: 30589 / UC Case 2019-429-0


Software defined radio techniques require digital signal processing. Digital switching in the radio frequency (RF) environment generates unwanted harmonics and adjacent channel interference. Resolving these issues requires expensive analog filtering or digitally intensive and power-hungry methods such as raised cosine filters, sigma-delta modulation, and digital predistortion.


Researchers at the University of California, Santa Barbara have discovered a power digital, low-complexity switching technique for managing out of band signal leakage and switching harmonics. By adding precise switching intervals on the edges of each digital transition, the unwanted interference is eliminated allowing the digital RF front-end to be standards-compliant wideband at lower power consumption than sigma-delta modulation. This technique can also be executed with lower system requirements than the current industry alternatives.


  • Improved RF signal integrity
  • Standard-compliant wireless transmission
  • Reduced power consumption
  • Wideband software-defined radio


  •  5G networks - New Radio
  •  Internet of Things (IOT)
  •  Software-defined radio
  •  RF signal generation

Patent Status

Country Type Number Dated Case
Patent Cooperation Treaty Reference for National Filings WO 2020/242778 12/03/2020 2019-429

Patent Pending

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Other Information


5G, Network, Radio, RF, Wireless, SDR, IOT, Internet of things, New radio

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