RF output spectrum measurement analyzer and method
US6512788B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 24, 1998 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Nov 24, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present invention provides an RF spectrum measurement analyzer and method and more particularly to a GSM output RF spectrum measurement analyzer and corresponding method. One preferred embodiment of the present invention is applicable to GSM applications. However, other embodiments could be applicable to the general class of Time Division Multiple Access (TDMA) signals of which GSM, PDC (Pacific Digital Cellular), NADC and the like are a part. According to one preferred embodiment of the present invention, the method includes the steps of acquiring an RF carrier signal; converting the acquired RF carrier signal to an IF signal; converting the IF signal to a digital signal of relatively wide bandwidth; FFT filtering the digital signal to measure multiple offset frequencies within the IF bandwidth; and mathematically applying a resolution bandwidth filter at each offset. A further embodiment includes the steps of inverse FFT filtering the output of the resolution bandwidth filter and measuring the power in the time domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.