Method and system for mitigating the effects of a transmitted blocker and distortions therefrom in a radio receiver
US9755691B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Nov 14, 2013 |
| Grant date | Sep 5, 2017 |
| Priority date | — |
| Expiry date | Jul 31, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2647
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A radio receiver processing path has a mixer with active interference/blocker cancellation to reduce the intensity of leaked and undesired signals by using a replica of the transmitted signal, emulating the phase and attenuation through the leakage path and subtracting the emulated signal within the mixer. Intermodulation distortions are predicted through the use of nonlinear modeling in the digital baseband between the baseband transmitter and baseband receiver and subsequently subtracted from the received signal. The nonlinear basis functions are combined to model the composite nonlinearity in the signal path based on digital baseband transmitted data. The modeled nonlinearity is subtracted from the received signal, and the result is observed and used to guide the nonlinear modeling parameters using self-contained control loops.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.