Highly linear receiver front-end with thermal and phase noise cancellation
US9148186B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2014 |
| Grant date | Sep 29, 2015 |
| Priority date | — |
| Expiry date | Apr 28, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/123
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio receiver supporting cancellation of thermal and phase noise in a down-converted RF signal. An inbound RF signal and blocking signal are provided directly to a passive mixer for down-conversion into a first baseband signal having data, thermal noise, and reciprocal mixing (RM) noise components. The inbound signals are also provided to a transconductance circuit, the output of which is provided to a second passive mixer for conversion into a current signal having data and blocking signal components, and a RM image. The blocking signal component and the RM image are mixed with a second LO signal, derived from the blocking signal, to produce a RM noise cancellation signal. The data component of the current signal is converted into a second baseband signal having data and thermal noise components. The first baseband signal, second baseband signal and RM noise cancellation signal are then combined through harmonic recombination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.