Interrogators communication systems communication methods and methods of processing a communication signal
US6324211A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1998 |
| Grant date | Nov 27, 2001 |
| Priority date | — |
| Expiry date | Apr 24, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D3/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention includes interrogators, communication systems, communication methods, and methods of processing a communication signal. One aspect of the present invention provides a backscatter system interrogator including a downconverter configured to receive a backscatter communication signal having a first frequency and convert the backscatter communication signal having the first frequency to a subcarrier signal having a second frequency less than the first frequency; a filter coupled with the downconverter and configured to filter direct path energy from the subcarrier signal; and a gain control coupled with the filter and configured to adjust the gain of the filtered subcarrier signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.