Frequency shifting a communications signal(S) in a multi-frequency distributed antenna system (DAS) to avoid or reduce frequency interference
US9253003B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 2015 |
| Grant date | Feb 2, 2016 |
| Priority date | — |
| Expiry date | Aug 12, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/14
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Frequency shifting a communications signal(s) in a multiple frequency (multi-frequency) distributed antenna system (DAS) to avoid or reduce frequency interference is disclosed. Related devices, methods, and DASs are disclosed. Non-limiting examples of frequency interference include frequency band interference and frequency channel interference. As a non-limiting example, frequency interference in a multi-frequency DAS may result from non-linearity of a signal processing component generating an out-of-band harmonic of a first, in-use communications signal in a first frequency band, within different frequency band(s) of other in-use communications signal(s). To avoid or reduce such interference, embodiments disclosed herein involve predicting frequency interference that may result from processing received, in-use communications signals in multiple frequency bands to be distributed in a multi-frequency DAS. Frequency shifting is performed to avoid or reduce any interfering signal products produced from the signal processing of any in-use communications signals, from interfering in the frequencies of other in-use communications signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.