Adjacent channel optimized receiver
US8219059B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2009 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Dec 17, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/1054
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention offers significant improvements in the performance of a radio receiver operating in an environment with high desired band interference. The present invention comprises a high selectivity RF circuit that is located between the antenna and the radio receiver, and utilizes superheterodyne technology to filter adjacent channel interference in the desired band frequency spectrum. This type of interference is problematic for IEEE 802.11 radio receivers that are implemented with the popular direct conversion radio receiver architectures. The present invention may be utilized in many types of radio receivers. The high selectivity RF circuit comprises channel select filters, a down-converter, an up-converter and a programmable local oscillator. The radio receiver provides control signals to the high selectivity RF circuit that permits the selection of an appropriate channel select filter and permits the generation of a local oscillator that subsequently generates the proper intermediate frequency in a mixer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.